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Journal articles on the topic 'Composite material'
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1
Seng, De Wen. "Visualization of Composite Materials’ Microstructure with OpenGL." Applied Mechanics and Materials 189 (July 2012): 478–81. http://dx.doi.org/10.4028/www.scientific.net/amm.189.478.
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The composite material is made by two or more of the same nature, substance or material combinations together new material. Through appropriate methods, different materials are to be combined with each other sets’ advantages of various materials into one, and to be available to the various properties of new materials. This is the fundamental reason for the rapid development of composite materials and composite technology. The fiber reinforced composite fibrous material in such materials as filler, in order to play an enhanced role. The fiber reinforced composite materials and fiber reinforced ceramic matrix composites are discussed in detailed. OpenGL is used to implement visualization of composites' material microstructure, which can specify fiber parameters to gain a basis of visualization.
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Kala, Shiva Kumar, and Chennakesava Reddy Alavala. "Enhancement of Mechanical and Wear Behavior of ABS/Teflon Composites." Trends in Sciences 19, no. 9 (April 8, 2022): 3670. http://dx.doi.org/10.48048/tis.2022.3670.
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In the present investigations, Most of the engineering applications of metallic materials are replaced by polymeric based composite materials. Because of the low cost and accessible handling of polymer composite materials such as Acrylonitrile butadiene styrene (ABS) matrix materials are used to make the composites with additions of filler enhance the properties of the matrix materials. In the present study, ABS matrix material is used to make the composite materials by adding the Teflon materials. Investigations are carried out to find the enhancement of the composites' mechanical properties. Optimizing the process parameters is done to identify the composite's most optimum used to get composite with better mechanical properties. SEM analysis and wear Debris are investigated to study the microscopic surface nature and behavior of the composites.
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Bolf, Davor, Albert Zamarin, and Robert Basan. "Composite Material Damage Processes." Journal of Maritime & Transportation Science 3, no. 3 (June 2020): 307–23. http://dx.doi.org/10.18048/2020.00.23.
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Composite materials are in use in the shipbuilding industry for a long period of time. Composites appear in vast number of fibre – matrix combinations and can be produced with several different production processes. Due to the specific nature of the composite material structure, the selection of the production process and the limitations in the quality control procedures, composite materials will always be subject to defects and imperfections which may, under certain circumstances, lead to the appearance and propagation of cracks. The size and the shape of the crack, the load type and the stress field in the material surrounding the crack will be crucial for crack growth and crack propagation. This paper reviews the composite material damage processes especially relevant for shipbuilding. The basic principles of composite material fracture mechanics are briefly explained, and finally, mechanisms responsible for the development of damage and fracture of composite materials are presented. This paper has emerged from the need to summarize information about composite material fracture and failure mechanisms and modes relevant for the shipbuilding industry.
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Thakkar, Radhika, Anuj P. Maini, Sahil Mogla, Syed Shah Hussain Qadri, Praveen K. Varma, and Alok Dubey. "Effect of Staining Beverages on Color Stability of Composite: A Spectrophotometric Study." Journal of Pharmacy and Bioallied Sciences 16, Suppl 1 (February 2024): S389—S392. http://dx.doi.org/10.4103/jpbs.jpbs_611_23.
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ABSTRACT Objective: This study used spectrophotometry to examine how staining beverages affect the color stability of three commercial composite materials (nanohybrid composite (A), bulk fill composite (B), and flowable composite (C)) over time. Materials and Methods: Composite discs were randomly divided into groups. The specimens were kept in coffee, tea, red wine, and cola for 14 days at 37°C in the dark. At baseline, 7 days, and 14 days, spectrophotometers measured color. Calculated and analyzed color differences (E). Results: Staining beverages changed the color of all composites. Composite material A had the best color stability, whereas material C stained beverages the most. Red wine and coffee discolored composites most. Discoloration increased over the 14-day immersion period. Conclusion: Composite materials with better color stability were material A. Red wine and coffee discolored composites most. When choosing restorative materials, dentists should consider composite materials’ color stability for long-lasting, visually acceptable results.
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Ishii, Chika, Kimitaka Asatani, and Ichiro Sakata. "Detecting possible pairs of materials for composites using a material word co-occurrence network." PLOS ONE 19, no. 1 (January 26, 2024): e0297361. http://dx.doi.org/10.1371/journal.pone.0297361.
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Composite materials are popular because of their high performance capabilities, but new material development is time-consuming. To accelerate this process, researchers studying material informatics, an academic discipline combining computational science and material science, have developed less time-consuming approaches for predicting possible material combinations. However, these processes remain problematic because some materials are not suited for them. The limitations of specific candidates for new composites may cause potential new material pairs to be overlooked. To solve this problem, we developed a new method to predict possible composite material pairs by considering more materials than previous techniques. We predicted possible material pairs by conducting link predictions of material word co-occurrence networks while assuming that co-occurring material word pairs in scientific papers on composites were reported as composite materials. As a result, we succeeded in predicting the co-occurrence of material words with high specificity. Nodes tended to link to many other words, generating new links in the created co-occurrence material word network; notably, the number of material words co-occurring with graphene increased rapidly. This phenomenon confirmed that graphene is an attractive composite component. We expect our method to contribute to the accelerated development of new composite materials.
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Utami, Mala, Jonathan Ernest Sirait, Beny Budhi Septyanto, Aries Sudiarso, and I. Nengah Putra Apriyanto. "Laminar Composite Materials for Unmanned Aircraft Wings." Defense and Security Studies 3 (December 21, 2022): 106–12. http://dx.doi.org/10.37868/dss.v3.id211.
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Unmanned Aerial Vehicles (UAVs) have high popularity, especially in the military field, but are now also being applied to the private and public sectors. One of the UAV components that require high material technology is the wing. The latest material technology developed as a material for unmanned aircraft wings is a composite material that has high strength and lightweight. This research aims to identify composite materials that can be used for unmanned aircraft wing structures. The method used in this research is a qualitative method with a literature study approach. The results of this theoretical study show that some of the latest composite materials that have been developed into materials for unmanned aircraft wings are Laminar Composites with a sandwich structure. Laminar and sandwich composites consist of various constituent materials such as Balsa wood fiber-glass and polyester resin, microparticles, Carbon Fibre Reinforced Polymer, polymer matrix composites reinforced with continuous fibers, Polymer matrix composites, E-glass/Epoxy, Kevlar/Epoxy, Carbon/Epoxy, woven fabrics, acrylonitrile butadiene styrene-carbon (ABS) laminated with carbon fiber reinforced polymer (CFRP) and uniaxial prepreg fabrics. Laminar and sandwich composite materials are a reference for developing unmanned aircraft wing structures that have resistant strength and lightweight.
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Zhao, Fei, Bo Zhou, Xiuxing Zhu, and Haijing Wang. "Constitutive model of piezoelectric/shape memory polymer composite." Journal of Physics: Conference Series 2713, no. 1 (February 1, 2024): 012037. http://dx.doi.org/10.1088/1742-6596/2713/1/012037.
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Abstract The PZT/SMP composite material, combining piezoelectricity and shape memory effects, has emerged as a novel multifunctional smart material and has gained significant attention. The establishment of an effective constitutive model, describing the mechanical properties of the composites, holds tremendous importance in both theoretical and engineering realms. This study aims to develop a model to investigate the mechanical properties of PZT/SMP composites. By incorporating the deformation mechanisms of the PZT/SMP composites and the theories of viscoelasticity, the constitutive equation for PZT/SMP composites has been established. Based on composite material theory and the properties of transversely isotropic materials, combined with the material parameter equations for SMP, the material parameter equations of PZT/SMP composites have been established. Using the polarization direction of the composite material as an example, we conduct simulation analyses on PZT/SMP composites with various volume fractions of PZT particles by using the developed constitutive model. The variations in material parameter performance, piezoelectric performance, and shape memory performance are investigated. The simulation results demonstrate that an increase of PZT content in the PZT/SMP composite enhances both the piezoelectric and mechanical properties of the composite material, which significantly influences the shape memory process.
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Qian, Bosen, Fei Ren, Yao Zhao, Fan Wu, and Tiantian Wang. "Enhanced Thermoelectric Cooling through Introduction of Material Anisotropy in Transverse Thermoelectric Composites." Materials 12, no. 13 (June 26, 2019): 2049. http://dx.doi.org/10.3390/ma12132049.
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Transverse thermoelectric materials can achieve appreciable cooling power with minimal space requirement. Among all types of material candidates for transverse thermoelectric applications, composite materials have the best cooling performance. In this study, anisotropic material properties were applied to the component phase of transverse thermoelectric composites. A mathematical model was established for predicting the performance of fibrous transverse thermoelectric composites with anisotropic components. The mathematical model was then validated by finite element analysis. The thermoelectric performance of three types of composites are presented, each with the same set of component materials. For each type of component, both anisotropic single-crystal and isotropic polycrystal material properties were applied. The results showed that the cooling capacity of the system was improved by introducing material anisotropy in the component phase of composite. The results also indicated that the orientation of the anisotropic component’s property axis, the anisotropic characteristic of a material, will significantly influence the thermoelectric performance of the composite. For a composite material consisting of Copper fiber and Bi2Te3 matrix, the maximum cooling capacity can vary as much as 50% at 300 K depending on the property axis alignment of Bi2Te3 in the composite. The composite with Copper and anisotropic SnSe single crystal had a 51% improvement in the maximum cooling capacity compared to the composite made of Copper and isotropic SnSe polycrystals.
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Yamatogi, Toshio, Hideaki Murayama, Kiyoshi Uzawa, Takahiro Mishima, and Yasuaki Ishihara. "Study on Composite Material Marine Propellers." Journal of The Japan Institute of Marine Engineering 46, no. 3 (2011): 330–40. http://dx.doi.org/10.5988/jime.46.330.
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Saikishore, G. J., K. Giridhar Saikiran, V. Chakri, Anshuman K, D. S. Naga Malleswara Rao, G. Saravanan, and L. S. P. Subbu. "Investigation of mechanical properties and thermal properties on sugarcane fiber composite material reinforced with polyethylene terephthalate matrix material for sustainable applications." E3S Web of Conferences 552 (2024): 01004. http://dx.doi.org/10.1051/e3sconf/202455201004.
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In this modern age composite materials are become the primary material for engineering production because composite materials have several specific properties such as high strength-to-weight ratio, low cost, ease of fabrication, tensile strength, compressive strength, Impact strength, high resistance to thermal which does not realize in pure material or non-composite material. Fabricating composite materials involves producing something useful from waste materials. The experimental investigation involves the fabrication of sugarcane fiber-reinforced PET composites through a controlled manufacturing process. Because of its vast application, every Mechanical Engineer should have the knowledge about the fabricate and test the composite material. In this research, two waste materials are used - bagasse and waste plastic to fabricate a composite. The main purpose of the composite material is for heat insulation that is applicable for industrial roofing. The main purpose of the composite material is for heat insulation that is applicable for industrial roofing applications and manufacturing for sustainable components. The mechanical results after compression and shear tests are 4.57 and 0.37 MPa respectively. The maximum thermal test after an exposed surface temperature test is 54 °C
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Teja, M. Eswar. "FABRICATION AND TESTING OF TiBA COMPOSITE POLYMER." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 04 (April 2, 2024): 1–5. http://dx.doi.org/10.55041/ijsrem29938.
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The modern environment is demanding more and more creative composite materials that provide high mechanical and thermal qualities. Composites are favored over traditional materials because they improve the properties of the base material and have a broad range of applications. One of the primary benefits of utilizing composite materials over conventional materials for components is weight reduction. Composite materials can be stronger than conventional materials even though they are lighter. Chemical resistance and electrical insulation qualities are two more benefits of choosing a composite material over a traditional kind. The objective of the current study is to assess the mechanical and thermal properties of Areca and Basalt fibers that have been reinforced using epoxy and matrix, with and without filler in the form of titanium dioxide powder. The mechanical properties of composites, such as their hardness, tensile, compression, flexural, and impact strengths, are assessed by varying the weight percentage of filler material. TGA, DTG, and DTA thermal properties are also assessed. The composite plate with 10g of TiO2 powder filer achieved excellent strength. Key Words: BCF (Basalt Continuous Fiber) DTG (Derivative Thermogravimetry), DTA (Differential Thermal Analysis), TGA (Thermal Gravimetric Analysis), FRCC (Fiber reinforced cementitious composites)
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Markovičová, Lenka, and Viera Zatkalíková. "The Effect of Filler Content on the Mechanical Properties of Polymer Composite." Applied Mechanics and Materials 858 (November 2016): 190–95. http://dx.doi.org/10.4028/www.scientific.net/amm.858.190.
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A composite material is a macroscopic combination of two or more distinct materials, having a recognizable interface between them. Modern composite materials are usually optimized to achieve a particular balance of properties for a given range of applications. Composites are commonly classified at two distinct levels. The first level of classification is usually made with respect to the matrix constituent. The major composite classes include organic – matrix composites (OMC's), metal – matrix composites (MMC's), and ceramic – matrix composites (CMC's). The OMC's is generally assumed to include two classes of composites: polymer – matrix composites (PMC's) and carbon – matrix composites [1]. The composite material used in the work belongs to the PMC's and the composite is formed by the polymer matrix - high density polyethylene. As filler was used hard-magnetic strontium ferrite. Composite samples were prepared with different filler content (0%, 60%, 70%, 80%). Testing of polymer composites included: tensile test, elongation at break, impact test, hardness test.
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Markovičová, Lenka, and Viera Zatkalíková. "Composites With Rubber Matrix And Ferrimagnetic Filling." System Safety: Human - Technical Facility - Environment 1, no. 1 (March 1, 2019): 776–81. http://dx.doi.org/10.2478/czoto-2019-0099.
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AbstractA composite material is a macroscopic combination of two or more distinct materials, having a recognizable interface between them. Modern composite materials are usually optimized to achieve a particular balance of properties for a given range of applications. Composites are commonly classified at two distinct levels. The first level of classification is usually made with respect to the matrix constituent. The major composite classes include organic – matrix composites (OMC's), metal – matrix composites (MMC's), and ceramic – matrix composites (CMC's). The OMC's is generally assumed to include two classes of composites: polymer – matrix composites (PMC's) and carbon – matrix composites (Peters, 1998). The composite material used in the work belongs to the PMC's and the composite is formed by the polymer matrix – rubber (sidewall mixture). As filler was used hard-magnetic strontium ferrite. Composite samples were prepared with different filler content (20%, 30%, 40%, 50%). Testing of polymer composites included: tensile test, elongation at break, hardness test and study of morphology.
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Henry Widya Prasetya, Dadang Sanjaya Atmaja, and Ilham Satrio Utomo. "Pengaruh Susunan Laminasi Serat Gelas Terhadap Kekuatan Tarik Komposit Untuk Bodi Lori Inspeksi." V-MAC (Virtual of Mechanical Engineering Article) 5, no. 2 (November 25, 2020): 44–46. http://dx.doi.org/10.36526/v-mac.v5i2.1061.
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Composite material is a type of new, engineered material consisting of two or more materials where the properties of each material differ from one another both in chemical and physical properties and remain separate in the final material. Composite materials have many advantages, one of which is lighter weight and corrosion resistance. In this study, composites made from glass fiber were carried out with variations in the arrangement of laminates, in order to select the material which was then applied to the manufacture of the inspection lorry body. Composites were made using the hand lay-up method. Tensile test specimens made according to ASTM D-638. The results of the tensile test show that the highest tensile strength of glass fiber composite material for the inspection lorry body is 5.45 MPa and the lowest tensile strength is 4.62 MPa.
Keyword: composite, glass fiber, tensile test, inspection lorry
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Janiszewski, Jacek, Paweł Przybyłek, Rafał Bieńczak, Łukasz Komorek, and Miłosz Sobieski zu Schwarzenberg. "The influence of the manufacturing method on the mechanical properties of the honeycomb core sandwich composite." Technologia i Automatyzacja Montażu, no. 4 (2022): 20–33. http://dx.doi.org/10.7862/tiam.2022.4.3.
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Reducing weight and fuel consumption is one of the main goals of modern aeronautical engineering. The most common materials to achieve this goal are composite layered materials, including the sandwich ones. High strength, stiffness and low density have made sandwich composites one of the fundamental materials of the aerospace industry. Sandwich-structured composites can be manufactured with a variety of methods, differing primarily in the manufacturing time, which translates into an overall cost of making a composite component. The research focused on three methods of manufacturing sandwich composite materials with a honeycomb core, differing in the number of operations, during which it was possible to obtain a finished composite panel (single-phase, two-phase and three-phase methods). The authors manufactured and examined composites with a honeycomb cover and two composite glass fibre-reinforced covers. The composites were made by means of the vacuum bag method. As a result of the conducted study, it was found that composites manufactured with the single-phase method have the shortest manufacture time as well as the lowest material consumption, however their strength properties are the lowest. The two-phase method requires a longer manufacture time and more material consumption, however it makes it possible to obtain a composite with higher strength compared with the single-phase method. The three-phase method has the longest composite manufacture time and the highest material consumption.
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Huang, Fang. "Study on Mechanical Properties of Wood Plastic Composites." Applied Mechanics and Materials 182-183 (June 2012): 307–10. http://dx.doi.org/10.4028/www.scientific.net/amm.182-183.307.
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Composite material has many excellent properties, current, receives special attention was paid to its mechanical properties. By adding the dispersed phase can make the strength of the composites than did not join the dispersed phase of pure matrix material strength several times or several times. Composite materials are often called fiber ( or other dispersed phase) reinforced composite materials.
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Zhang, Jun, Zude Zhou, Fan Zhang, Yuegang Tan, and Renhui Yi. "Molding process and properties of continuous carbon fiber three-dimensional printing." Advances in Mechanical Engineering 11, no. 3 (March 2019): 168781401983569. http://dx.doi.org/10.1177/1687814019835698.
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Currently, carbon fiber composite has been applied in the field of three-dimensional printing to produce the high-performance parts with complex geometric features. This technique comprise both the advantages of three-dimensional printing and the material, which are light weight, high strength, integrated molding, and without mold, and the limitation of model complexity. In order to improve the performance of three-dimensional printing process using carbon fiber composite, in this article, a novel molding process of three-dimensional printing for continuous carbon fiber composites is developed, including the construction of printing material, the design of printer nozzle, and the modification of printing process. A suitable structure of nozzle on the printer is adjusted for the continuous carbon fiber composites. For the sake of ensuring the continuity of composited material during the processing, a cutting algorithm for jumping point is proposed to improve the printing path during process. On this basis, the experiment of continuous carbon fiber composite is performed and the mechanical properties of the printed test samples are analyzed. The results show that the tensile strength and bending strength of the sample printed by polylactic acid–continuous carbon fiber composites increased by 204.7% and 116.3%, respectively compared with pure polylactic acid materials, and those of the sample printed by nylon–continuous carbon fiber composites increased by 301.1% and 17.4% compared with pure nylon materials, and those of test sample by nylon–continuous carbon fiber composites under the heated and pressurized treatment increased by 383.6% and 233.2% compared with pure nylon material.
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Kim, Jeongguk. "Investigation of Failure Mechanisms in Ceramic Composites as Potential Railway Brake Disc Materials." Materials 13, no. 22 (November 15, 2020): 5141. http://dx.doi.org/10.3390/ma13225141.
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Ceramic composite materials have been efficiently used for high-temperature structural applications with improved toughness by complementing the shortcomings of monolithic ceramics. In this study, the fracture characteristics and fracture mechanisms of ceramic composite materials were studied. The ceramic composite material used in this study is Nicalon ceramic fiber reinforced ceramic matrix composites. The tensile failure behavior of two types of ceramic composites with different microstructures, namely, plain-weave and cross-ply composites, was studied. Tensile tests were performed on two types of ceramic composite material specimens. Microstructure analysis using SEM was performed to find out the relationship between tensile fracture characteristics and microstructure. It was found that there was a difference in the fracture mechanism according to the characteristics of each microstructure. In this study, the results of tensile tests, failure modes, failure characteristics, and failure mechanisms were analyzed in detail for two fabric structures, namely, plain-weave and cross-ply structures, which are representative of ceramic matrix composites. In order to help understanding of the fracture process and mechanism, the fracture initiation, crack propagation, and fracture mechanism of each composite material are schematically expressed in a two-dimensional figure. Through these results, it is intended to provide useful information for the design of ceramic composite materials based on the mechanistic understanding of the fracture process of ceramic composite materials.
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Kim, Kyungju, Dasom Kim, Kwangjae Park, Myunghoon Cho, Seungchan Cho, and Hansang Kwon. "Effect of Intermetallic Compounds on the Thermal and Mechanical Properties of Al–Cu Composite Materials Fabricated by Spark Plasma Sintering." Materials 12, no. 9 (May 10, 2019): 1546. http://dx.doi.org/10.3390/ma12091546.
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Aluminium–copper composite materials were successfully fabricated using spark plasma sintering with Al and Cu powders as the raw materials. Al–Cu composite powders were fabricated through a ball milling process, and the effect of the Cu content was investigated. Composite materials composed of Al–20Cu, Al–50Cu, and Al–80Cu (vol.%) were sintered by a spark plasma sintering process, which was carried out at 520 °C and 50 MPa for 5 min. The phase analysis of the composite materials by X-ray diffraction (XRD) and energy-dispersive spectroscopy (EDS) indicated that intermetallic compounds (IC) such as CuAl2 and Cu9Al4 were formed through reactions between Cu and Al during the spark plasma sintering process. The mechanical properties of the composites were analysed using a Vickers hardness tester. The Al–50Cu composite had a hardness of approximately 151 HV, which is higher than that of the other composites. The thermal conductivity of the composite materials was measured by laser flash analysis, and the highest value was obtained for the Al–80Cu composite material. This suggests that the Cu content affects physical properties of the Al–Cu composite material as well as the amount of intermetallic compounds formed in the composite material.
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Kalizhanova, Aliya, Ainur Kozbakova, Bakhyt Eralieva, Murat Kunelbayev, and Zhalau Aitkulov. "RESEARCH AND ANALYSIS OF THE PROPERTIES OF COMPOSITE MATERIALS. DEFINITION AND CLASSIFICATION OF COMPOSITE MATERIALS." Вестник КазАТК 128, no. 5 (October 19, 2023): 131–40. http://dx.doi.org/10.52167/1609-1817-2023-128-5-131-140.
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Unlike conventional materials, composites have become a suitable form for a range of current applications in industry, hospital and sports. This is combined with their remarkable physical, thermal, galvanic and mechanical properties, as well as, in addition, their low weight and investment cost in the given cases. This review article attempts to provide a general concept of composite materials, definition and classification of composite materials, most commonly polymer matrix composites and metal matrix composites. Polypropylene polyurethane and aluminum alloy were selected as matrices for this extract given their attractive properties and their use in various applications. All kinds of research are devoted to a variety of building materials, material processing and various properties. The determination of mechanical data appears to be a significant iterative process in the development and design of composite materials and their components. With regard to the mechanical properties of composite materials, this article highlights some of the uncertainties and limitations that affect the evaluation of mechanical properties, ranging from material constituents, industrial process, test characteristics and environmental conditions.
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Guo, Liang, Wenbin Tong, Yexin Xu, and Hong Ye. "Composites with Excellent Insulation and High Adaptability for Lightweight Envelopes." Energies 12, no. 1 (December 25, 2018): 53. http://dx.doi.org/10.3390/en12010053.
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Lightweight insulation materials are widely used in lightweight buildings, cold-chain vehicles and containers. A kind of insulation composite, which can combine the super insulation of state-of-the-art insulation materials or structures and the machinability or adaptability of traditional insulation materials, was proposed. The composite consists of two components, i.e., polyurethane (PU) foam as the base material and vacuum insulation panel (VIP) or silica aerogel as the core material. The core material is in plate shape and covered with the base material on all sides. The thermal conductivity of the core material is nearly one order lower than that of the base material. The effective thermal conductivity of the insulation composite was explored by simulation. Simulation results show that the effective thermal conductivity of the composite increases with the increase of the thermal conductivity of the core material. The effective thermal conductivities of the composites decrease with the increase of the cross-section area of the core material perpendicular to heat flow direction and the thicknesses of the core material parallel with heat flow direction. These rules can be elucidated by a series-parallel mode thermal resistance network method, which was verified by the measured results. For composite with a VIP as the core material, when the cross-section area and thickness of the VIP are respectively larger than 60% and 21% of the composite, the composite’s effective thermal conductivity can be 50% or less than that of the base material. Simulated heat loss of the envelope adopting the insulation composites with VIP as the core material is nearly a half of that of the envelope adopting traditional insulation materials.
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Lv, Xiangzhe, Zaiji Zhan, and Haiyao Cao. "Microstructure Evolution and Mechanical Properties of Needle-like ZrB2 Reinforced Cu Composites Manufactured by Laser Direct Energy Deposition." Micromachines 13, no. 2 (January 28, 2022): 212. http://dx.doi.org/10.3390/mi13020212.
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Laser additive manufacturing is an advanced material preparation technology, which has been widely used to prepare various materials, such as polymers, metals, ceramics and composites. Zirconium diboride (ZrB2) reinforced copper composite material was fabricated using laser direct energy deposition technology. The microstructure and phase composition of the composite material were analyzed, and the influence of laser energy density on the microstructure and mechanical properties of composite materials was discussed. The results showed that the needle-like ZrB2 ceramic reinforcement was successfully synthesized via an in-situ synthesis reaction. The composites were mainly composed of needle-like ZrB2, Ni dendrites and a Cu matrix. The morphological changes of Ni dendrites could be observed at the interface inside the composite material: cellular crystals → large-sized columnar dendrites → small-sized dendrites (along the solidification direction). The continuous Ni dendritic network connected the ZrB2 reinforcements together, which significantly improved the mechanical properties of the composite material. At a laser energy density of 0.20 kJ/mm2, the average microhardness of the composite material reached 294 HV0.2 and the highest tensile strength was 535 MPa. With the laser energy density increased to 0.27 kJ/mm2, the hardness and tensile strength decreased and the elongation of the Cu composites increased due to an increase in the size of the ZrB2 and a decrease in the continuity of the Ni dendritic.
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Manurung, Rokki, Sutan Simanjuntak, Jesayas Sembiring, Richard A. M. Napitupulu, and Suriady Sihombing. "Analisa Kekuatan Bahan Komposit Yang Diperkuat Serat Bambu Menggunakan Resin Polyester Dengan Memvariasikan Susunan Serat Secara Acak Dan Lurus Memanjang." SPROCKET JOURNAL OF MECHANICAL ENGINEERING 2, no. 1 (November 5, 2020): 28–35. http://dx.doi.org/10.36655/sproket.v2i1.296.
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Composites are materials which are mixed with one or more different and heterogeneous reinforcement. Matrix materials can generally be polymers, ceramics and metals. The matrix in the composite serves to distribute the load into all reinforcing material. Matrix properties are usually ductile. The reinforcing material in the composite has the role of holding the load received by the composite material. The nature of the reinforcing material is usually rigid and tough. Strengthening materials commonly used so far are carbon fiber, glass fiber, ceramics. The use of natural fibers as a type of fiber that has advantages began to be applied as a reinforcing material in polymer composites. This study seeks to see the effect of the use of bamboo natural fibers in polyester resin matrix on the strength of polymer composites with random and straight lengthwise fiber variations. From the tensile test results it can be seen that bamboo fibers can increase the strength of polymer composites made from polyester resin and the position of the longitudinal fibers gives a significantly more strength increase than random fibers.
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KAGEYAMA, Kazuro. "Composite material course.Fracture mechanics of composite material.1." Journal of the Japan Society for Composite Materials 18, no. 2 (1992): 83–89. http://dx.doi.org/10.6089/jscm.18.83.
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Aydaraliev, Zh, M. Abdiev, and Yu Ismanov. "Two-layer Composite Reinforced With Basalt Fibers of Various Lengths." Bulletin of Science and Practice 6, no. 5 (May 15, 2020): 12–20. http://dx.doi.org/10.33619/2414-2948/54/01.
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The article considers the issues of creating composites using long, continuous structures along the entire length of the structure, and short basalt fibers, and, based on them, multilayer composite materials as reinforcement. A mathematical description of the strength properties of multilayer composite materials based on layers of composites using long, continuous along the entire length of the structure, and short basalt fibers as reinforcement is considered. The results of theoretical studies showed that the multilayer composite material has improved properties. The first layer of material, which is a layer of reinforcement made of continuous fibers, provides tensile and bending strength. The second layer of composite material provides thermal insulation properties and compressive and deformation strength. This layer consists of a composite whose reinforcement is short fibers. It is shown that a multilayer composite material, which is a combination of composites created on the basis of long continuous and short fibers, works as a single system. The first layer of the composite, created on the basis of continuous fibers, works in tension and bending, the second layer, created on the basis of short fibers, determines the strength characteristics during compression and deformation. In order to confirm the theoretical results, work was carried out to create composites based on long and short basalt fibers. When creating a layered composite, a heat-insulating plate was used as the first component, which was reinforced with pieces of basalt fiber. For the production of such plates, a plant was developed to obtain pieces of basalt fiber and further uniform distribution of these pieces in a composite plate. A multilayer composite material with improved properties based on long and short basalt fibers is obtained. The composite slab was reinforced with a mesh assembled from continuous basalt fibers.
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He, Wei, Xiaodong Huang, Jun Zhang, Yue Zhu, Yajun Liu, Bo Liu, Qilong Wang, Xiaonan Huang, and Da He. "CaCO3–Chitosan Composites Granules for Instant Hemostasis and Wound Healing." Materials 14, no. 12 (June 17, 2021): 3350. http://dx.doi.org/10.3390/ma14123350.
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Excessive bleeding induces a high risk of death and is a leading cause of deaths that result from traffic accidents and military conflict. In this paper, we developed a novel porous chitosan–CaCO3 (CS–CaCO3) composite material and investigated its hemostatic properties and wound healing performance. The CS–CaCO3 composites material was prepared via a wet-granulation method. Granulation increases the infiltrating ability of the CS–CaCO3 composites material. The improved water absorption ability was enhanced to 460% for the CS–CaCO3 composites material compared to the CaCO3 or chitosan with only one single component. The coagulation studies in vivo illustrated that the blood clotting time was greatly reduced from 31 s for CaCO3 to 16 s for the CS–CaCO3 composite material. According to the results of the wound healing experiments in rats, it was found that the CS–CaCO3 composite material can promote wound healing. The CS–CaCO3 composite material could accelerate wound healing to a rate of 9 days, compared with 12 days for the CaCO3. The hemostatic activity, biocompatibility, and low cost of CS–CaCO3 composite material make it a potential agent for effective hemostatic and wound healing materials.
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Kwon, Hansang, Mart Saarna, and Marc Leparoux. "Effects of Processing Parameters on Mechanical Properties of Silicon Carbide Nanoparticle-Reinforced Aluminium Alloy Matrix Composite Materials." Journal of Nanoscience and Nanotechnology 20, no. 10 (October 1, 2020): 6482–88. http://dx.doi.org/10.1166/jnn.2020.17884.
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Nano-silicon carbide (nSiC) particle-reinforced aluminium (Al) 6061 alloy matrix composites were fabricated by high-energy ball milling, hot-pressing (HP), and hot-forging (HF). The composite powders were degassed and the composites were synthesised under air and/or vacuum. Mechanical properties of the obtained composite materials were evaluated using various tests, including indentation, compression, four-point bending, and tensile tests as well as by microstructural observations. Different amounts of nSiC were added and the mechanical properties of the obtained composite materials were measured and discussed. The microstructures of the composites depended on the nSiC content and synthesis conditions. The Vickers hardness and tensile strength values of the nSiC reinforced Al 6061 composites were approximately three times higher than that of a pure Al 6061 alloy bulk. The results demonstrated that the small amount of nSiC particles functioned as efficient reinforcement material in the Al 6061 alloy matrix composite material and that the strength and ductility of the composite material can be controlled by adjusting the processing parameters and nSiC content.
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Balaji, N., S. Balasubramani, T. Ramakrishnan, and Y. Sureshbabu. "Experimental Investigation of Chemical and Tensile Properties of Sansevieria Cylindrica Fiber Composites." Materials Science Forum 979 (March 2020): 58–62. http://dx.doi.org/10.4028/www.scientific.net/msf.979.58.
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The natural fiber reinforced composites are least expensive material and alternative material of wood, plastic material for the construction and industrial applications. The polymer based composites are used to fabricate the automobile components. The present investigation the composite materials reinforced with sansevieria cylindrica fibers were fabricated. These fibers were used because of their impressive mechanical properties. The composite panels are fabricated by hand lay-up technique. Sansevieria cylindrica fibers and polyester resin to produce the composite material. Sansevieria cylindrica plant has each leaf 20 to 30mm thickness and height 1000 to 2000mm approximately. The chemical tests of fiber and tensile strength for different fiber length composites such as 10mm, 20mm, 30mm, 40mm, & 50mm are determined.
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Bryll, Katarzyna, Ewelina Kostecka, Mieczysław Scheibe, Renata Dobrzyńska, Tomasz Kostecki, Wojciech Ślączka, and Iga Korczyńska. "Evaluation of Fire Resistance of Polymer Composites with Natural Reinforcement as Safe Construction Materials for Small Vessels." Applied Sciences 13, no. 10 (May 9, 2023): 5832. http://dx.doi.org/10.3390/app13105832.
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In small vessels, for example, yachts, polymer–glass composites are mainly used for their construction. However, the disposal and/or recycling of composite units is very difficult. It is advisable to solve the problem of disposing of post-consumer items as soon as possible. Therefore, alternative, environmentally friendly, but also durable and safe construction materials are being sought. Such materials can be polymer–natural composites, which can be used as a potential material (alternative to polymer–glass composites) for the construction of small vessels. However, its performance properties should be investigated as new construction materials. The possibility of using polymer–hemp composites was assessed in terms of safety, i.e., the fire resistance of these materials. This paper compares selected characteristics that the reaction of composite materials has to fire with glass fiber and hemp fiber reinforcements. During the study, a natural composite reinforced with hemp fabric was investigated. Based on the laboratory test, it was found that this composite showed better susceptibility to energy recycling, with a relatively small deterioration in fire resistance compared to the composite reinforced with glass fiber. This material could therefore be a potential construction material for small vessels if we consider fire resistance in terms of the safety of the vessel’s operation.
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Rafiq, Mr Jawed, and Abhishek Pal. "Fabrication of Fiber Reinforced Composite Material Using Bamboo Fiber, Glass Fiber and Polyester." International Journal for Research in Applied Science and Engineering Technology 11, no. 5 (May 31, 2023): 3293–301. http://dx.doi.org/10.22214/ijraset.2023.52168.
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Abstract: Sheet Composites are essential for the aerospace, space, and automotive industry. In fact, a lot of structures and highperformance machines incorporate composites into their design. There are plenty of companies in India who perform composite analysis and manufacturing. Having knowledge and experience in the design and fabrication of composite material increases the employ-ability of an engineer. In this project, you are going to fabricate a composite material in which multiple materials will be used as fiber. This will help you gaining knowledge of composite material too.There are many processes to fabricate a composite material, such as hand lay-up, automated lay-up, spray-up, filament winding, protrusion, resin transfer molding etc. but hand layup method is easy and cost-effective. You will use this process to fabricate this composite material. After fabricating the sample, you need to perform the Tensile test and Compressive test by making standard specimens of your sample in Charpy impact test machine.
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Musliman, Acep, and Fitri Damayanti. "ANALISIS MEKANIK DAN TERMAL MATERIAL KOMPOSIT BERBASIS SERAT ECENG GONDOK SEBAGAI BAHAN KEMASAN RAMAH LINGKUNGAN." JOURNAL ONLINE OF PHYSICS 9, no. 1 (November 2, 2023): 98–103. http://dx.doi.org/10.22437/jop.v9i1.28125.
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This study aims to analyze the mechanical and thermal properties of water hyacinth fiber-based composite materials as an alternative to environmentally friendly packaging materials. This composite material is produced by mixing water hyacinth fiber with a natural polymer matrix that can decompose easily. Manufacturing methods include mixing, pressing, and thermal treatment processes. The mechanical properties of composite materials, including tensile strength and resistance to deformation, are tested using tensile tests and hardness tests. Thermal analysis is carried out through thermogravimetric tests (TGA) to identify the thermal stability and decomposition of the material. The results showed that the water hyacinth fiber-based composite materials had fairly good mechanical properties in certain mixture compositions, although they were not as strong as composite materials using synthetic fibers. However, this material shows potential in packaging applications that do not require extreme mechanical strength. The mechanical properties of the water hyacinth fiber composite produced lead to the fulfillment of the need for use as packaging, which is light, flexible and not easily broken. The thermal properties of the composites show faster decomposition compared to synthetic fiber based composites, but are still within the acceptable range for single-use packaging. With its environmentally friendly properties, this composite material can be an attractive alternative to reduce the use of plastic in the packaging industry. Nonetheless, improvements in manufacturing processes and material formulations are still required to improve their mechanical and thermal properties and maintain packaging durability under diverse usage conditions.
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Chandra, Anuj. "Retrofitting of the Structure using Composite Material FRP." International Journal for Research in Applied Science and Engineering Technology 9, no. 10 (October 31, 2021): 1242–52. http://dx.doi.org/10.22214/ijraset.2021.38601.
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Abstract: Retrofitting is the process of modifying existing structures in order to increase their performance and durability. Dayto-day concrete structures may require retrofitting owing to a variety of issues such as corrosion, detailing laceration, and bonding failure, among others. Fiber reinforced polymers (FRP) are a relatively recent method used in retrofitting to strengthen and repair structural damage. The goal of this research is to go over the advantages, applications, and major challenges of employing FRP as a composite material. To begin, the paper will describe the principles of FRP composites, including the definition and description of components such as fibers and matrices. We have collected significant information properties of composite materials and uses in retrofitting process to improve strength and durability of the structure and studying the behavior of reinforced concrete structure strengthened (retrofitted) using composite materials in this paper on Retrofitting of the Structure using Composite material FRP. Our research included a fact study and prediction analysis of key records and data connected to our research purpose, which assisted us in reaching a conclusion on Retrofitting of the Structure Using Composite Material FRP and also comparative analysis between steel retrofitting and composites materials (FRP) retrofitting of the existing structure. Keywords: Retrofitting, FRP, Concrete reinforced, Matrix, Rehabilitation
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Martínez-Sabio, Laura, Lissethe Peñate, María Arregui, Ana Veloso Duran, José Raúl Blanco, and Francisco Guinot. "Comparison of Shear Bond Strength and Microleakage between Activa™ Bioactive Restorative™ and Bulk-Fill Composites—An In Vitro Study." Polymers 15, no. 13 (June 27, 2023): 2840. http://dx.doi.org/10.3390/polym15132840.
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Bioactive materials have emerged as a promising alternative to conventional restorative materials as part of more conservative dentistry. The aim of this study was to evaluate and compare the shear bond strength (SBS) and microleakage of a new bioactive restorative material, two bulk-fill restorative composites, and a conventional composite at 24 h, 4 weeks, and 8 weeks. Three hundred and sixty molars and premolars were divided into four groups: ACTIVA™ BioACTIVE Restorative™, Filtek™ Bulk-Fill Restorative Composite, Tetric® N-Ceram Bulk-Fill Composite, and G-aenial® Composite. The normality of the data was determined with the Kolmogorov-Smirnov test, then the two-way ANOVA and Fisher’s test were used for analyzing SBS data, and the Kruskal-Wallis and DSCF tests were conducted to analyze the microleakage. In the SBS test, there were no statistically significant differences between materials (p = 0.587), and the relation between material and time (p = 0.467), time points showed statistically significant differences (p = 0.016). As for the microleakage, statistically significant differences were found for all three time periods (p < 0.05), showing the conventional composite to have the lowest microleakage, followed by the bioactive material, and lastly the two bulk-fill composites. In conclusion, the new bioactive material has similar evaluated properties to bulk-fill composites (bond strength) and conventional composites (bond strength and microleakage) and can be used as an alternative restorative material.
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Rajak, Dipen, Durgesh Pagar, Pradeep Menezes, and Emanoil Linul. "Fiber-Reinforced Polymer Composites: Manufacturing, Properties, and Applications." Polymers 11, no. 10 (October 12, 2019): 1667. http://dx.doi.org/10.3390/polym11101667.
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Composites have been found to be the most promising and discerning material available in this century. Presently, composites reinforced with fibers of synthetic or natural materials are gaining more importance as demands for lightweight materials with high strength for specific applications are growing in the market. Fiber-reinforced polymer composite offers not only high strength to weight ratio, but also reveals exceptional properties such as high durability; stiffness; damping property; flexural strength; and resistance to corrosion, wear, impact, and fire. These wide ranges of diverse features have led composite materials to find applications in mechanical, construction, aerospace, automobile, biomedical, marine, and many other manufacturing industries. Performance of composite materials predominantly depends on their constituent elements and manufacturing techniques, therefore, functional properties of various fibers available worldwide, their classifications, and the manufacturing techniques used to fabricate the composite materials need to be studied in order to figure out the optimized characteristic of the material for the desired application. An overview of a diverse range of fibers, their properties, functionality, classification, and various fiber composite manufacturing techniques is presented to discover the optimized fiber-reinforced composite material for significant applications. Their exceptional performance in the numerous fields of applications have made fiber-reinforced composite materials a promising alternative over solitary metals or alloys.
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Yu, Seonghun, Junhee Lee, Jongkyu Kim, Hojong Chang, Chansol Kang, and Jeehyun Sim. "Analysis of Mechanical Properties and Structural Analysis According to the Multi-Layered Structure of Polyethylene-Based Self-Reinforced Composites." Polymers 15, no. 20 (October 11, 2023): 4055. http://dx.doi.org/10.3390/polym15204055.
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In this research, a self-reinforced composite material was manufactured using a single polyethylene material, and this self-reinforced composite material has excellent recyclability and is environmentally friendly compared to composite materials composed of other types of material, such as glass fiber reinforced composites (GFRP) and carbon fiber reinforced composites (CFRP). In this research, the manufactured self-reinforced composite material consists of an outer layer and an inner layer. To manufacture the outer layer, low density polyethylene (LDPE) films were laminated on high density polyethylene (HDPE) fabrics and knitted fabrics, and composite materials were prepared at various temperatures using hot stamping. A 3D printing process was utilized to manufacture the inner layer. After designing a structure with a cross-sectional shape of a triangle, circle, or hexagon, the inner layer structure was manufactured by 3D printing high-density polyethylene material. As an adhesive film for bonding the outer layer and the inner layer, a polyethylene-based self-reinforced composite material was prepared using a low-density polyethylene material. Input data for simulation of self-reinforced composite materials were obtained through tensile property analysis using a universal testing machine (UTM, Shimadzu, Kyoto, Japan), and the physical property values derived as output data and actual experimental values were obtained. As a result of the comparison, the error rate between simulation data and experimental data was 5.4% when the shape of the inner layer of self-reinforced composite material was a hexagon, 3.6% when it was a circle, and 7.8% when a triangular shape showed the highest value. Simulation in a virtual space can reduce the time and cost required for actual research and can be important data for producing high-quality products.
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Li, Guang, Gui Dong Luan, and Hao Qu. "Study on Novel Relaxor Ferroelectric Single Crystal PMNT/Epoxy Composite." Applied Mechanics and Materials 475-476 (December 2013): 1257–61. http://dx.doi.org/10.4028/www.scientific.net/amm.475-476.1257.
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Use relaxor ferroelectric single crystals PMNT as piezoelectric phase, epoxy resin as a non-piezoelectric phase material, take the cutting - filling method fabricated piezoelectric composite. Its structure character is achieved 1-3 type piezoelectric composites and piezoelectric crystal substrate composite again inseries by the integration, the composite horizontal and vertical bracket to be supported by piezoelectric crystal frame, it has a good impact resistance and affected by changes in ambient temperature characteristics. This composite material both has the advantages of 1-3 type composites, and has stable mechanical and thermal properties. Based on R.E.Newnhams series-parallel theory, combined with the structural characteristics of this composite, given the formula of piezoelectric composites density, piezoelectric constant, and dielectric constant. Fabricated the PMNT / epoxy composites and piezoelectric PZT / epoxy piezoelectric composite materials samples, which have the same scale, the same structural parameters. The experimental results show that, the piezoelectric composite test parameter values match theoretical calculations. The PMNT/epoxy composite has batter function than PZT/epoxy composite.
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Kayili, Merve Tuna, and Gülser Celebi. "ENVIRONMENTAL PROPERTIES OF ENVIRONMENTALLY FRIENDLY CONSTRUCTION MATERIALS: RECYCLED LDPE COMPOSITES FILLED BY BLAST FURNACE DUST." Journal of Green Building 16, no. 3 (June 1, 2021): 135–53. http://dx.doi.org/10.3992/jgb.16.3.135.
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ABSTRACT This study focused on creating a sustainable composite material using blast furnace dust of the iron-steel industry and plastic wastes of the plastic industry in order to reduce the embodied energy of the material and generate more sustainable material. In this study, varying amounts of blast furnace dust (BFD), which is the primary iron-steel industry waste and which is used as filler for recycled low-density polyethylene (LDPE), was mixed to create the composite material. The embodied energy, emissions to water and air (volatile organic compounds) of BFD filled LDPE composites were determined. It was found that the composite materials had less embodied energy compared with polymer-based flooring materials such as epoxy, polyurethane (PU) and polyvinylchloride (PVC). In addition, it was determined that the composite material did not release emissions to water and have fewer total volatile organic compounds (TVOCs). These results showed that the produced composite material could be used in buildings as a sustainable floor coating material, thus saving raw materials and supporting indoor air quality and recycling.
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Vanaerschot, Andy, Stephan Lomov, David Moens, and Dirk Vandepitte. "Variability in Composite Materials Properties." Applied Mechanics and Materials 807 (November 2015): 23–33. http://dx.doi.org/10.4028/www.scientific.net/amm.807.23.
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Composite materials are created as a quite complex architecture which includes a fibre reinforcement structure and matrix material. Many material parameters play a role when composite structures are modelled, e.g. in finite element models. In addition to the properties of the raw fibre and matrix materials which are used, also geometrical parameters have a significant effect on structural characteristics. Fibre reinforcement geometry together with material properties of fibre and matrix determine homogenised material properties.The first part of the paper gives an overview of the most important processes which are used in composites processing industry. The factors which affect variability are also listed, and the effect of variability on material parameters is mentioned as well. The second part of the paper elaborates the identification of geometrical variability of the fibre reinforcement structure which is encountered with one particular type of composite material, namely a twill 2/2 carbon fibre weave with an epoxy matrix.
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binti Mohd, Nurul Farah Adibah, Taufik Roni Sahroni, and Mohammad Hafizudin Abd Kadir. "Feasibility Study of Casted Natural Fibre-LM6 Composites for Engineering Application." Advanced Materials Research 903 (February 2014): 67–72. http://dx.doi.org/10.4028/www.scientific.net/amr.903.67.
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This paper presents the investigation of casted natural fiber-LM6 composites for engineering application. The objective of this research is to study the feasibility of natural fibre to introduce in the metal matrix composites for sand casting process. LM6 is the core material used in this research while natural fibre used as composite materials as well as to remain the hardness of the materials. The preparation of natural fibre composites was proposed to introduce in metal matrix composite material. Empty Fruit Bunch (EFB) and kenaf fibre were used in the experimental work. Natural fibre is reinforced in the LM6 material by using metal casting process with open mould technique. LM6 material was melted using induction furnace which required 650°C for melting point. The structure and composition of the composite materials is determined using EDX (Energy Dispersive X-ray) to show that fibres are absent on the surface of LM6. The microstructure of casted natural fibre-LM6 composites was presented using Zeiss Scanning Electron Microscope (SEM) with an accelerating voltage of 15kV. As a result, natural fibre composites were feasible to be introduced in metal matrix composites and potential for engineering application.
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Wu, Yulun. "Application of carbon fiber composite materials in aircraft." Applied and Computational Engineering 61, no. 1 (May 8, 2024): 245–48. http://dx.doi.org/10.54254/2755-2721/61/20240969.
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Carbon fiber composite is a material with excellent mechanical properties. Compared with other high-performance fiber materials, carbon fiber composites have the advantages of high strength and high modulus even at ultra-high temperatures. In addition, the carbon fiber composite material also has excellent electrical and thermal conductivity and electromagnetic shielding performance. Carbon fiber composites are widely used in the aircraft manufacturing industry due to their incomparable performance with other composite materials. In recent years, the amount of carbon fiber composite materials in newly developed aircraft products has reached more than 50%. This paper aims to explore the application of carbon fiber in aircraft, and to reflect the importance of carbon fiber composite materials by comparing models that use composite materials and models that do not use composite materials. The study explores the application of carbon fiber composite materials in aircraft through a comprehensive literature analysis and review. Key findings indicate significant advantages of these materials in enhancing aircraft performance, including reduced weight and increased strength. The paper also discusses the challenges in manufacturing and environmental impacts, offering insights into future research directions for sustainable aviation technologies.
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Yan, Dinkun. "NiMoO4/MnCo2O4 for high-performance positive electrodes of supercapacitors." Journal of Physics: Conference Series 2783, no. 1 (June 1, 2024): 012015. http://dx.doi.org/10.1088/1742-6596/2783/1/012015.
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Abstract To discover more effective energy storage materials, it is crucial to investigate the impact of composite properties. The composite material NiMoO4/MnCo2O4 was synthesized on a nickel foam substrate through hydrothermal and annealing methods. Physical and electrochemical performance tests were subsequently performed on the product. The X-ray diffraction analysis revealed a blend of NiMoO4 and MnCo2O4 peaks. The microscopic morphology of the composites yielded both nanosheet arrays and nanoflowers. Furthermore, the EDS patterns demonstrated inconsistent elemental distributions, which confirm a composite material nature. The material exhibits promising electrochemical properties, offering a viable solution for incorporating composites into the anode of supercapacitors.
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Prokešová, Pavla, Nikolay Petkov, Jiří Čejka, Svetlana Mintova, and Thomas Bein. "Micro/Mesoporous Composites Based on Colloidal Zeolite Grown in Mesoporous Matrix." Collection of Czechoslovak Chemical Communications 70, no. 11 (2005): 1829–47. http://dx.doi.org/10.1135/cccc20051829.
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Composite materials containing micro- and mesopores are prepared under instantaneous hydrothermal treatment of initial solutions generally used for zeolite Beta and precursor solutions for mesoporous Al-MCM-41 material. The resulting composites are compared with pure, highly crystalline colloidal microporous Beta zeolite and hexagonally ordered mesostructured samples. The porosity and morphological features of the composite materials are influenced by the conditions of hydrothermal synthesis of the initial colloidal solutions used for the preparation of Beta seeds, as well as by the conditions of the synchronized crystallization of the final composites. The embedding of Beta seeds in the mesoporous silica matrix is possible via immediate heating of mesoporous precursor solutions with Beta seeds primarily formed. The composite materials contain either microcrystalline Beta nanodomains with sizes of about 5-10 nm surrounded by mesoporous material or defined Beta nanocrystals (20-40 nm), and at the same time connected with mesostructured material. The presence of highly crosslinked silicate framework walls and tetrahedrally coordinated aluminum in the composite material are confirmed by solid-state 29Si and 27Al MAS NMR spectroscopy. The concentration of Brønsted acid sites in the micro/mesoporous composites is increased substantially in comparison with pure mesoporous Al-MCM-41 material proven by FTIR acetonitrile-d3 adsorption study.
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Thilmany, Jean. "Unknown Qualities." Mechanical Engineering 135, no. 08 (August 1, 2013): 44–49. http://dx.doi.org/10.1115/1.2013-aug-2.
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This article reviews various tools that are evolving to help engineers work with complex composite materials. Specialized composite analysts are needed to help find the best material for a particular use and to determine if it can be manufactured with the chosen material and in a particular shape. The Falcon Heavy spaceflight system is planned to launch on a SpaceX-designed rocket engine. As composite materials are lighter than metal, SpaceX engineers realized that composites could improve the strength-to-weight ratio of its materials. In order to help engineers choose the best composite for the design, the software system contains a large library of material models that designers can use to explore a composite material and determine how it might behave under a variety of circumstances. Predicting how the cracks will affect the part long-term still cannot be done within software packages and must be prototyped.
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Gönder, Hakan Yasin, Reza Mohammadi, Abdulkadir Harmankaya, İbrahim Burak Yüksel, Yasemin Derya Fidancıoğlu, and Said Karabekiroğlu. "Teeth Restored with Bulk–Fill Composites and Conventional Resin Composites; Investigation of Stress Distribution and Fracture Lifespan on Enamel, Dentin, and Restorative Materials via Three-Dimensional Finite Element Analysis." Polymers 15, no. 7 (March 25, 2023): 1637. http://dx.doi.org/10.3390/polym15071637.
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Objectives: the aim of this study was to examine the stress distribution of enamel, dentin, and restorative materials in sound first molar teeth with restored cavities with conventional resin composites and bulk–fill composites, as well as to determine their fracture lifetimes by using the three-dimensional finite element stress analysis method. Materials and Methods: an extracted sound number 26 tooth was scanned with a dental tomography device and recorded. Images were obtained as dicom files, and these files were transferred to the Mimics 12.00 program. In this program, different masks were created for each tooth tissue, and the density thresholds were adjusted manually to create a three-dimensional image of the tooth, and these were converted to a STL file. The obtained STL files were transferred to the Geomagic Design X program, and some necessary adjustments, such as smoothing, were made, and STP files were created. Cavity preparation and adhesive material layers were created by transferring STP files to the Solidworks program. Finally, a FE model was created in the ABAQUS program, and stress distributions were analyzed. Results: when the bulk–fill composite and conventional resin composite materials were used in the restoration of the cavity, the structures that were exposed to the most stress as a result of occlusal forces on the tooth were enamel, dentin, restorative material, and adhesive material. When the bulk–fill composite material was used in restoration, while the restorative material had the longest fracture life as a result of stresses, the enamel tissue had the shortest fracture life. When the conventional resin composite material was used as the restorative material, it had the longest fracture life, followed by dentin and enamel. Conclusion: when the bulk–fill composite material was used instead of the conventional resin composite material in the cavity, the stress values on enamel, dentin, and adhesive material increased as a result of occlusal forces, while the amount of stress on the restorative material decreased. In the fracture analysis, when the bulk–fill composite material was used instead of the conventional resin composite material, a decrease in the number of cycles required for the fracture of enamel, dentin, and restorative materials was observed as a result of the forces generated in the oral cavity.
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Acchar, Wilson, Marcus Diniz, Ygor Alexandre A. Fonseca, and F. C. C. Costa. "Effect of a LZSA Glass Infiltration on the Properties of a Porous Ceramic Composite Material Derived from Polysiloxane/Al/Nb." Materials Science Forum 591-593 (August 2008): 409–14. http://dx.doi.org/10.4028/www.scientific.net/msf.591-593.409.
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By using the active filler controlled polymer pyrolysis, new and cost-effective composite materials can be obtained. In this work, ceramic matrix composites were prepared by using this precursor route, using a polysiloxane network filled with metallic niobium and aluminum powders as active fillers. The mixtures were blended, uniaxially warm pressed, and pyrolyzed in flowing argon at 1400 °C. Porous ceramic preforms were infiltrated with a LZSA glass material, in order to improve the density of a porous composite material. The properties of the pyrolyzed composite material and the effect of the LZSA infiltration on the Al2O3-NbC-SiOC ceramic composite material were investigated. The results have showed that the infiltration processes has improved the physical and mechanical properties of the composite material.
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Firmansyah, Hilmi Iman, Wirawan Wirawan, and Moh Nasir Hariyanto. "Analysis of Fiber Metal Composite Shear Strength Using Independent Variables of Fiber Angle Orientation and Metal Surface Roughness." Jurnal Energi dan Teknologi Manufaktur (JETM) 5, no. 02 (December 30, 2022): 29–34. http://dx.doi.org/10.33795/jetm.v5i02.136.
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Fiber Metal Laminates (FML) is a classification of metallic materials consisting of several thin layers of metal combined with composite materials. The constraint of FML is the weak bond between the layer material and the core composite. The weak bond between the layer material and the core composite can be influenced by several things, including the absence of an interlock system between the layer material and the core composite so that the strength of the FML composite decreases. In this study, a study was conducted on the shear strength of FML composites using the independent variables of surface roughness and fiber angle orientation. The highest shear strength in FML composite with fiber angle orientation of 45/45° and with a surface roughness value of 2.128 m with a shear strength value of 2.7 MPa
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Li, Yan. "A Multiscale Framework for Designing High-Toughness Composite Materials." International Journal of Computational Methods 17, no. 05 (May 7, 2019): 1940008. http://dx.doi.org/10.1142/s0219876219400085.
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Development of high-toughness composite materials requires careful microstructure design as geometric distribution of phases, constituent properties and interface attributes combine to influence the deformation and failure behavior of composites. In two-phase composite materials, reinforcement cracking and interface debonding are two competing fracture mechanisms observed during the crack–microstructure interactions. The activation of each fracture mechanism largely depends on the microstructure and ultimately determines the fracture toughness of composites. The objective of this study is to quantify the competition of the two fracture mechanisms as function of microstructure and find their intricate coupling with material fracture toughness. The multiscale material design framework developed here allows fracture toughness to be predicted through cohesive element-based fracture simulation and digital image correlation measurement. Based on the numerical and experimental results, two analytical models are developed for fracture mode determination of both brittle and ductile composites. Although calculations carried out concern ceramic composites Al2O3/SiC and metal matrix composites Al/SiC, the approach developed can be applied to other composite material systems.
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Ghias, A. Siddique Ahmed, and B. Vijaya Ramnath. "Investigation of Tensile Property of Aluminium SiC Metal Matrix Composite." Applied Mechanics and Materials 766-767 (June 2015): 252–56. http://dx.doi.org/10.4028/www.scientific.net/amm.766-767.252.
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The composite material is a combination of two or more materials with different physical and chemical properties. The composite has superior characteristics than those individual components. A hybrid composite is the one which contains at least three materials. When the matrix material is a metal, the composite is termed as metal matrix composites (MMC). The MMC is a composite material with two constituent parts, one being a metal. The other material may be another metal, ceramic or fiber. Among all the MMC’s, Aluminium is the most widely used matrix material due to its light weight, high strength and hardness. This paper deals with the fabrication and mechanical investigation of hybrid metal matrix composite Al - SiC. The fabrication is done by stir casting by adding the required quantities of additives into the stirred molten Aluminium. The results show significant effect of mechanical properties such as tensile strength, yield stress and flexural strength. The internal structure of the composite is observed using Scanning electron microscope (SEM) and found that are formation of pores in them.
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Dzierwa, Andrzej, and Nataliia Stelmach. "ANALYSIS OF STRENGTH CRITERIA IN THE DESIGN OF PRODUCTS FROM COMPOSITE MATERIALS." Bulletin of Kyiv Polytechnic Institute. Series Instrument Making, no. 61(1) (June 30, 2021): 46–51. http://dx.doi.org/10.20535/1970.61(1).2021.237094.
Full textAbstract:
Technological progress gives rise to the continuous expansion of the class of structural materials and the improvement of their properties. The appearance of new materials is due to the natural desire to increase the efficiency of the structures under development. One of the most striking manifestations of progress in the development of materials, structures and technology is associated with the development and application of composite materials. Composites have a number of obvious advantages over other materials, in particular over metals. Such advantages are high specific strength and rigidity, high corrosion resistance, good ability to withstand alternating loads and others. It should be noted another, perhaps the most important feature of composites - is the ability to change the properties of the material in accordance with the purpose of the structure and the nature of its load during operation.
Under the influence of loads on the structure, its strength is estimated by the ultimate state of the materials of the structural elements. When a boundary state arises in a material, its transition to another mechanical state - elastic, plastic, or fracture state - occurs. This article aims to determine the optimal criterion for the strength of composite material that takes into account different values of ultimate stresses not only in different directions of the coordinate axes, but also to stretch and compress and further calculate the maximum allowable load for single-layer unidirectional composite material
During the research the main properties of composite materials, methods of manufacturing parts from composite material, their main properties and methods of destruction were considered. The characteristics of the strength criteria of composite materials are given, the most suitable for calculating the maximum value of the allowable load for a single-layer unidirectional composite material is determined. The proposed approach to the optimal design of elements of single-layer composite structures may be of interest to developers of numerous and analytical methods for solving problems of optimal design of more complex structures.
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Bege�, Özlem Akyüz, and Hakan Bege�. "An Analysis of Water Sorption of Some Composites Used in Dentistry." Materiale Plastice 60, no. 2 (July 3, 2023): 76–83. http://dx.doi.org/10.37358/mp.23.2.5663.
Full textAbstract:
This study aimed to investigate the water sorption levels of 3 different condensable bulk fill composites, two flowable bulk fill composites, two microhybrid composites, one nanofilled composite, and one nanohybrid composite material polymerized with the same beam device on the 14th and 30th days.We evaluated nine different composite materials. The materials were prepared as cylindrical blocks (n=7) with a diameter of 7 mm and a thickness of 2 mm and polymerized. Each sample was kept in distilled water for specified times and measured by the ISO 4049 method.We used The Kruskal-Wallis test to compare more than two independent groups where numerical variables had no normal distribution. The Dwass-Steel-Critchlow-Fligner test evaluated differences between the groups if the non-parametric tests were applied. We used The Wilcoxon test to compare the numerical variables without normal distribution (water sorption values in the 14th and 30th-day measurements for each cement material).For water sorption, there was no statistically significant difference between the water sorption values of the resin composite materials on the 14th and 30th days. No statistically significant difference was found in comparing water sorption values between the 14th and 30th measurements for each resin composite material. There is a need for more extended studies by keeping the conditions constant for the evaluated composites and for bulk fill composites to be evaluated with 4mm samples.