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1
Khomenko, E. V., N. I. Grechanyuk e V. Z. Zatovsky. "Modern composite materials for switching and welding equipment. information 1. powdered composite materials". Paton Welding Journal 2015, n. 10 (28 ottobre 2015): 36–42. http://dx.doi.org/10.15407/tpwj2015.10.06.
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Öztaş, Saniye Karaman. "Fiber Reinforced Composite Materials in Architecture". Applied Mechanics and Materials 789-790 (settembre 2015): 1171–75. http://dx.doi.org/10.4028/www.scientific.net/amm.789-790.1171.
Testo completoAbstract (sommario):
Composite materials are made from two or more constituent materials with significantly different physical or chemical properties. The materials work together to give the composite more excellent properties than its components.Fiber reinforced composite materials constitute a widely used group of the composites. There are many researches about fiber reinforced composites. This study focused on fiber reinforced composite materials used in architecture unlike other researches. It was aimed to specify the benefits of the fiber composite materials for architecture and discussed several recent developments related to these materials. A literature review was made by grouping composites materials. The study reported that more research is needed for fiber reinforced composites to improve their technical performance, environmental and economic properties.
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Lagerlof, K. P. D. "Transmission electron microscopy of composite materials". Proceedings, annual meeting, Electron Microscopy Society of America 46 (1988): 1012–15. http://dx.doi.org/10.1017/s0424820100107125.
Testo completoAbstract (sommario):
Although most materials contain more than one phase, and thus are multiphase materials, the definition of composite materials is commonly used to describe those materials containing more than one phase deliberately added to obtain certain desired physical properties. Composite materials are often classified according to their application, i.e. structural composites and electronic composites, but may also be classified according to the type of compounds making up the composite, i.e. metal/ceramic, ceramic/ceramie and metal/semiconductor composites. For structural composites it is also common to refer to the type of structural reinforcement; whisker-reinforced, fiber-reinforced, or particulate reinforced composites [1-4].For all types of composite materials, it is of fundamental importance to understand the relationship between the microstructure and the observed physical properties, and it is therefore vital to properly characterize the microstructure. The interfaces separating the different phases comprising the composite are of particular interest to understand. In structural composites the interface is often the weakest part, where fracture will nucleate, and in electronic composites structural defects at or near the interface will affect the critical electronic properties.
4
Kala, Shiva Kumar, e Chennakesava Reddy Alavala. "Enhancement of Mechanical and Wear Behavior of ABS/Teflon Composites". Trends in Sciences 19, n. 9 (8 aprile 2022): 3670. http://dx.doi.org/10.48048/tis.2022.3670.
Testo completoAbstract (sommario):
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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Khosravani, Mohammad Reza. "Composite Materials Manufacturing Processes". Applied Mechanics and Materials 110-116 (ottobre 2011): 1361–67. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.1361.
Testo completoAbstract (sommario):
— Using Composite materials are growing more and more today and we have to use them in possible situation. One of the Composite materials applications is on the Airplane and aero space. Reduction of Airplane weight and more adaptability with nature are examples of benefit of using composite materials in aerospace industries. In this article process of manufacturing of composite materials and specially carbon fiber composite are explained. Advance composite materials are common today and are characterized by the use of expensive, high-performance resin systems and high-strength, high-stiffness fiber reinforcement. The aerospace industry, including military and commercial aircraft of all types, is the major customer for advanced composites. Product range now includes materials for low pressure and low temperature. Some using composite materials in aero space are as follow: Satellite Components, Thin Walled Tubing for Aircraft and Satellites, launch vehicle components and honeycomb structures.
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Ibraimov, T., e Y. Tashpolotov. "Technology for Producing Composite Materials Based on Multi-component Man-generic Raw Materials". Bulletin of Science and Practice 6, n. 12 (15 dicembre 2020): 274–80. http://dx.doi.org/10.33619/2414-2948/61/29.
Testo completoAbstract (sommario):
The state and prospects of development of production of composites based on various types of multicomponent raw materials (silicon oxide, slag, etc.) and their components are considered. Modern achievements in the field of condensed matter physics of composite materials with mineral matrices and various dimensional levels of fillers are considered. The approaches of leading scientific schools to the creation of composites are analyzed; it is revealed that many issues of obtaining multicomponent composite materials remain open. It is concluded that the optimization of the process of obtaining composites based on multicomponent raw materials should be carried out by changing the target functions and parameters that take into account all types of interaction of components. A method for selecting mineral matrices for the production of composite materials has been developed, the essence of which is to compare the component compositions of raw materials and composite materials, and the search for matrices is performed by the maximum optimal value of intermolecular distances in multicomponent raw materials and composite materials.
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Chen, Jieng-Chiang, e Bo-Yan Huang. "Flame-retardant corrugated paper/epoxy composite materials". Modern Physics Letters B 33, n. 14n15 (28 maggio 2019): 1940004. http://dx.doi.org/10.1142/s0217984919400049.
Testo completoAbstract (sommario):
The waterproof and flame-retardant properties of corrugated paper (CP) reinforced epoxy resin sandwich composites are discussed. Two composites, a CP-reinforced epoxy composite (CP/E composite) and a CP-reinforced flame-retardant epoxy composite (CP/FRE composite), were developed in this study. A dipping bath was developed for impregnating the paper with epoxy and a flame-retardant epoxy solution to make the CP/P and CP/FRE composite panels. A room-temperature-cured epoxy resin was blended with various contents (10%, 20%, and 30%) of phosphorus-based flame-retardant compounds and then was used as a matrix to make CP/FRE-10, CP/FRE-20, and CP/FRE-30 composite materials. Water absorption tests of these composites were used to estimate the waterproof properties. In addition, vertical and horizontal burning tests were used to evaluate the flame-retardant properties of the composites.
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Yamamoto, Tetsuya, Yuya Takahashi e Naoya Toyoda. "Dispersion of Nano-materials in Polymer Composite Materials". MATEC Web of Conferences 333 (2021): 11003. http://dx.doi.org/10.1051/matecconf/202133311003.
Testo completoAbstract (sommario):
Polymer composites materials are the subject of extensive studies because of their novel properties compared with their constituent materials. Dispersion stability of sub-micron sized particles in the medium is important from the point of colloidal views. In the present study, dispersion of nano-materials in the matrix polymer is one of the most important problems to enhance their mechanical properties. We tackled this problem to carry out surface modification of the nano-materials, such as carbon nano tubes (CNTs), using amphiphilic polymers, polyNvinylacetamide (PNVA), synthesized thorough radical polymerization. Hydrogen bond worked between PNVA onto the modified nano-materials and hydrophilic matrix, such as polyvinyl alcohol (PVA), to enhance surface adhesions and dispersions of the nano-materials in the matrix. As a result, the mechanical properties of their composites materials were strengthened. When CNTs were used in PVA, the transparency of the composite was also increased due to improvement of their dispersions. In addition, if the CNTs formed the networks in the composites, the highly conductive and transparent polymer composite films were fabricated.
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Yamamoto, Tetsuya, Yuya Takahashi e Naoya Toyoda. "Dispersion of Nano-materials in Polymer Composite Materials". MATEC Web of Conferences 333 (2021): 11003. http://dx.doi.org/10.1051/matecconf/202133311003.
Testo completoAbstract (sommario):
Polymer composites materials are the subject of extensive studies because of their novel properties compared with their constituent materials. Dispersion stability of sub-micron sized particles in the medium is important from the point of colloidal views. In the present study, dispersion of nano-materials in the matrix polymer is one of the most important problems to enhance their mechanical properties. We tackled this problem to carry out surface modification of the nano-materials, such as carbon nano tubes (CNTs), using amphiphilic polymers, polyNvinylacetamide (PNVA), synthesized thorough radical polymerization. Hydrogen bond worked between PNVA onto the modified nano-materials and hydrophilic matrix, such as polyvinyl alcohol (PVA), to enhance surface adhesions and dispersions of the nano-materials in the matrix. As a result, the mechanical properties of their composites materials were strengthened. When CNTs were used in PVA, the transparency of the composite was also increased due to improvement of their dispersions. In addition, if the CNTs formed the networks in the composites, the highly conductive and transparent polymer composite films were fabricated.
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Kalizhanova, Aliya, Ainur Kozbakova, Bakhyt Eralieva, Murat Kunelbayev e Zhalau Aitkulov. "RESEARCH AND ANALYSIS OF THE PROPERTIES OF COMPOSITE MATERIALS. DEFINITION AND CLASSIFICATION OF COMPOSITE MATERIALS". Вестник КазАТК 128, n. 5 (19 ottobre 2023): 131–40. http://dx.doi.org/10.52167/1609-1817-2023-128-5-131-140.
Testo completoAbstract (sommario):
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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Spasenović, Jovana, e Ivan Blagojević. "Composite materials in automotive industry: A review". Industrija 49, n. 2 (2021): 57–68. http://dx.doi.org/10.5937/industrija49-34540.
Testo completoAbstract (sommario):
Composite materials have found extensive use among many industries including automotive. Vehicles are supposed to be lightweight, have low emission and energy consumption to provide some environmental protection while having appropriate stiffness and strength to assure occupant protection. These requirements can be met with the use of composite materials. Although composites have been present in the industry for decades, their use in the automotive sector is moderately new, which requires development in design and manufacturing processes, testing, and recycling - this paper indicates the details by which the automotive industry differs from others. Principal recycling methods, related legislation, and where recycling products are used are described. Specific uses of composite materials that show a high level of innovativeness are indicated - hybrid and natural composites, structural batteries, and high-performance vehicles.
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Drpić, Aleksandar. "Characteristics of composite materials based on polylactic acid (PLA)". Tehnika 78, n. 6 (2023): 633–38. http://dx.doi.org/10.5937/tehnika2306633d.
Testo completoAbstract (sommario):
Polylactic acid (PLA) is aliphatic thermoplastic polyester. Composites based on PLA are biocompatible, biodegradable and non-toxic, which are the main advantages of using such composites. Based on the research results described in this paper, it was concluded that by adding natural fibers to the composite, certain characteristics can be significantly improved. This paper describes some of composite material characteristics based on PLA, modification of PLA, advantages and disadvantages of using PLA in composite materials, composition and methods of obtaining PLA-based composites, as well as the advantages of using wood plastic composites (WPC) based on PLA.
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van Tooren, M., C. Kasapoglou e H. Bersee. "Composite materials, composite structures, composite systems". Aeronautical Journal 115, n. 1174 (dicembre 2011): 779–87. http://dx.doi.org/10.1017/s0001924000006527.
Testo completoAbstract (sommario):
Abstract The first part of the history of composites in aerospace emphasised materials with high specific strength and stiffness. This was followed by a quest for reliable manufacturing techniques that guaranteed sufficiently high fibre volume fractions in complex structural parts with reasonable cost. Further improvements are still possible leading, ultimately to an extension of the functionality of composite structures to non-mechanical functions. Reduction of material scatter and a more probability-based design approach, improved material properties, higher post buckling factors, improved crashworthiness concepts and improved NDI techniques are some of the evolutionary measures that could improve the performance of current composite structures. Modular design, increased co-curing, hybrid material structures, hybrid fabrication methods, innovative structural concepts and reduced development times are more revolutionary steps that could bring today’s solutions further. Manufacturing engineering is also important for achieving revolutionary change. Function integration such as embedded deicing, morphing,, and boundary-layer suction are among the next steps in weight and cost reduction, but now on the system level.
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Kyzioł, Lesław. "Composite Materials for Warship Constructions". Journal of KONES 26, n. 4 (1 dicembre 2019): 135–40. http://dx.doi.org/10.2478/kones-2019-0100.
Testo completoAbstract (sommario):
AbstractThe article presents the basic properties of composite materials used for the construction of special ships. Static and dynamic characteristics of materials such as wood and polyester-glass composites are presented. Noteworthy are materials such as surface modified wood and polyester-glass composites with the addition of recyclate. Composite materials are widely used materials for the construction of non-magnetic warships. The article describes the properties of surface modified wood with polymethyl methacrylate and a polyester-glass composite with the addition of recyclate. The recyclate is fragmented, milled polyester-glass scrap. The content of the recyclate greatly affects the mechanical properties of the composite. The properties of the composite with the addition of recyclate depend on the recyclate content as well as the production technology and size of the recycled granulates. The test results showed that the increase in the recycled content causes a decrease in the mechanical properties of the composite. However, it should be remembered that these materials originated from waste, waste that is not subject to self-degradation, which have a very negative impact on the natural environment. At present, where there is a very large pollution of the natural environment, the processing and management of huge amounts of composite waste is an essential goal. A significant amount of recyclate significantly reduces the mechanical properties of the composite; however, the same large amount of recycled material has been transformed and used. The manufactured material and its structural elements are still non-magnetic structures and can be used on a less loaded element. The choice of material for the construction of special ships elements is determined not only by its properties but also by knowledge, experience, method of processing, economic and technical risk.
15
Seng, De Wen. "Visualization of Composite Materials’ Microstructure with OpenGL". Applied Mechanics and Materials 189 (luglio 2012): 478–81. http://dx.doi.org/10.4028/www.scientific.net/amm.189.478.
Testo completoAbstract (sommario):
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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Utami, Mala, Jonathan Ernest Sirait, Beny Budhi Septyanto, Aries Sudiarso e I. Nengah Putra Apriyanto. "Laminar Composite Materials for Unmanned Aircraft Wings". Defense and Security Studies 3 (21 dicembre 2022): 106–12. http://dx.doi.org/10.37868/dss.v3.id211.
Testo completoAbstract (sommario):
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.
17
Wu, Chuan Bao, e Bo Qiao. "URSS/PVA/WP Composite Materials: Preparation and Performance". Advanced Materials Research 968 (giugno 2014): 80–83. http://dx.doi.org/10.4028/www.scientific.net/amr.968.80.
Testo completoAbstract (sommario):
A novel kind of environmentally friendly composite materials containing upper part of rice straw segments (URSS), poly (vinyl alcohol) (PVA) and waste paper (WP) were prepared by hot-pressing at 140°C for 10 min. The tensile strength, tensile elongation and hardness of composites were measured. Results showed that the tensile strength and the strength at tensile break of the composites first increased and then decreased with increasing PVA content. Tensile strength was higher than the strength at tensile break at different PVA contents, indicating that URSS/PVA/WP composite materials had certain toughness. Otherwise, URSS/PVA/WP composite materials had higher tensile strength than URSS/PVA composites. The tensile strengths of them were respectively 9.25 MPa and 3.9 MPa when prepared at PVA content of 40%. The hardness of composites lay between 90 and 96. Negligible difference exists in every composite.
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Antic, Milica. "Composite materials". Zavarivanje i zavarene konstrukcije 61, n. 1 (2016): 19–28. http://dx.doi.org/10.5937/zzk1601019a.
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YUASA, Eiji. "Composite Materials". Journal of the Japan Society for Technology of Plasticity 48, n. 554 (2007): 213–19. http://dx.doi.org/10.9773/sosei.48.213.
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MASAO, SUMITA. "Composite Materials". Sen'i Gakkaishi 45, n. 12 (1989): P556—P563. http://dx.doi.org/10.2115/fiber.45.12_p556.
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MAKI, HIROSHI. "Composite Materials". Sen'i Gakkaishi 47, n. 1 (1991): P35—P39. http://dx.doi.org/10.2115/fiber.47.p35.
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Sims, Graham D. "Composite materials". Matériaux & Techniques 82, n. 6-7 (1994): 50–52. http://dx.doi.org/10.1051/mattech/199482060050.
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JACOBY, MITCH. "COMPOSITE MATERIALS". Chemical & Engineering News 82, n. 35 (30 agosto 2004): 34–41. http://dx.doi.org/10.1021/cen-v082n035.p034.
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Tarnopol'skii, Yuri M. "Composite materials series, vol. 7. thermoplastic composite materials". Composites Science and Technology 46, n. 1 (gennaio 1993): 87–88. http://dx.doi.org/10.1016/0266-3538(93)90085-u.
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Liang, Yun Xing, Li Chen, Hai Wen Liu e Hua Wu Liu. "The Development of a High Elastic 3D Prefabricated Composite". Advanced Materials Research 332-334 (settembre 2011): 1773–76. http://dx.doi.org/10.4028/www.scientific.net/amr.332-334.1773.
Testo completoAbstract (sommario):
With the development of modern technology, fiberglass composite materials are widely applied. The advantages of fiberglass reinforced composite materials are high strength and light weight. In order to produce a prefabricated fiberglass composite, a machine chart was drafted for weaving the 3D fiberglass fabric with five layers. The obtained five-layer 3D fabrics were composited with polyurethane matrix. Afterwards, the performance of the prefabricated composites was tested and the optimal ratio of fiberglass to matrix was determined by statistical analysis.
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Chmielewski, Marcin, Remigiusz Michalczewski, Witold Piekoszewski e Marek Kalbarczyk. "Tribological Behaviour of Copper-Graphene Composite Materials". Key Engineering Materials 674 (gennaio 2016): 219–24. http://dx.doi.org/10.4028/www.scientific.net/kem.674.219.
Testo completoAbstract (sommario):
In the present study, the influence of the volume fraction of graphene on the tribological properties of copper matrix composites was examined. The composites were obtained by the spark plasma sintering technique in a vacuum. The designed sintering conditions (temperature 950°C, pressing pressure 50 MPa, time 15 min) allowed obtaining almost fully dense materials. The tribological behaviour of copper-graphene composite materials was analysed. The tests were conducted using a CSM Nano Tribometer employing ball-on-plate tribosystem. The friction and wear behaviour of copper-graphene composite materials were investigated. An optical microscope, interferometer, and scanning electron microscope were used to analyse the worn surfaces. In friction zone, the graphene acts as a solid lubricant, which results in the increase in the content in the composites positively influencing the tribological characteristics of the steel- Cu-graphene composite.
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Zhao, Liang, Rui Ying Ma, Xiang Lan Meng, Gang Wang e Xiang Chen Fang. "Characterization and Preparation of Paraffin/Modified Inorganic Porous Materials Composites as Building Energy Storage Materials". Advanced Materials Research 450-451 (gennaio 2012): 1419–24. http://dx.doi.org/10.4028/www.scientific.net/amr.450-451.1419.
Testo completoAbstract (sommario):
Paraffin and modified inorganic porous materials composites as phase change energy storage materials were prepared by absorbing paraffin in porous network of inorganic materials. In composite materials, paraffin was used as phase change material (PCM) for thermal energy storage, and γ-Al2O3 acted as supporting material, ethanol was solvent. A series of characterization were conducted to analyse and test the performance of the composite materials, and differential scanning calorimeter (DSC) results showed that the PCM-3 composite has the melting latent heat of 115.9 kJ/kg with melting temperature of 63.0°C. Due to the capillary and surface tension forces between paraffin and γ-Al2O3, the leakage of melted paraffin from the composites can be prevented. Several kinds of paraffin mixtures were also studied by adsorbing into the supporting materials, so that the composite energy storage materials with different phase change temperature can be used in the building wall to storage thermal of different regions. In a word, the paraffin/γ-Al2O3 composites have a good thermal stability and can be used repeatedly.
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Gama, Ana Caroline Silva, Andre Guaraci de Vito Moraes, Lilyan Cardoso Yamasaki, Alessandro Dourado Loguercio, Ceci Nunes Carvalho e Jose Bauer. "Properties of Composite Materials Used for Bracket Bonding". Brazilian Dental Journal 24, n. 3 (giugno 2013): 279–83. http://dx.doi.org/10.1590/0103-6440201302184.
Testo completoAbstract (sommario):
The purpose of this study was to evaluate in vitro the shear bond strength to enamel, flexural strength, flexural modulus, and contraction stress of one orthodontic composite and two flowable composites. Orthodontic brackets were bonded to 45 human maxillary premolars with the composites Transbond XT, Filtek Z-350 flow and Opallis flow and tested for shear bond strength. For measurement of flexural strength and flexural modulus, specimens were fabricated and tested under flexion. For the contraction stress test, cylindrical specimens were tested and an extensometer determined the height of the specimens. The data were subjected to one-way ANOVA and Tukey's test (α=0.05). The shear bond strength values were significantly lower (p<0.05) for the flowable composites compared with the orthodontic composite. For the flexural strength, no statistically significant difference was found among the composites (p>0.05) while the flexural modulus was significantly higher (p<0.05) for Transbond XT than for Filtek Z-350 flow and Opallis flow. The orthodontic composite presented significantly lower contraction stress values than the flowable composites (p<0.05). The light-activated orthodontic composite material presented higher flexural modulus and shear bond strength and lower contraction stress than both flowable composites.
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Riesgo, Graciela, Laura Elbaile, Javier Carrizo, Rosario Díaz Crespo, María Ángeles García, Yadir Torres e José Ángel García. "Villari Effect at Low Strain in Magnetoactive Materials". Materials 13, n. 11 (29 maggio 2020): 2472. http://dx.doi.org/10.3390/ma13112472.
Testo completoAbstract (sommario):
Magnetic composites of soft magnetic FeGa particles embedded in a silicone matrix have been synthesized. The Villari effect has been studied depending on the size and concentration of the particles and on the magnetic state of the composite. The results indicate a decrease in the Villari effect when the concentration of the magnetic particles increases. These results suggest a relationship between the Villari effect and the mechanical properties of the composites. The Young’s modulus of the composites has been obtained by microindentation and their values related to the intensity and slope of the Villari signals. The results are explained on the basis that the reduction in the cross section of the composite when submitted to stress is the main origin of the variation of the magnetic flux in the Villari effect in this kind of composite. It has also been obtained that the magnetic state of the composite plays an important role in the Villari signal. When the magnetization of the composite is greater, the magnetic flux across the composite is greater too and, so, the same reduction in the cross section originates a greater Villari signal.
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Dr. S. Arunkumar, P. Bharathvaaj, R.K. Mathubalan e S. Logesh. "A Review on Composite Materials Reinforcing with Organic/ Natural Materials". International Research Journal on Advanced Engineering and Management (IRJAEM) 2, n. 03 (22 marzo 2024): 538–44. http://dx.doi.org/10.47392/irjaem.2024.0074.
Testo completoAbstract (sommario):
The utilization of natural and fiber-reinforced polymer matrix composites as a sustainable solution in the industries. The composite consists of sugarcane bagasse and mesquite fibers. which offers a low-cost, environmentally friendly alternative with potential applications in various industries. epoxy resin known for its cost-effectiveness and resilience, serves as the matrix material. Types of fabrication methods are Vacuum Bag Molding, Hand Lay-Up, Filament Winding, and Hydraulic compression molding from the literature we collected Hydraulic compression molding technique with varying fiber orientations (uniaxial, biaxial, and triaxial) is selected for its versatility and reduced material waste. The study involved alkaline, potassium permanganate, and potassium dichromate treatments. The overall study concludes the promising potential of using bagasse and mesquite fibers as sustainable alternatives for reinforcement in epoxy resin composites, offering a viable solution for valorizing agricultural waste and promoting environmentally conscious manufacturing practices. Chemical treatments and fiber processing play a crucial role in enhancing the properties of the fibers, making them suitable for composite applications.
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Naik, Nithesh, P. Suresh, Sanjay Yadav, M. P. Nisha, José Luis Arias-Gonzáles, Juan Carlos Cotrina-Aliaga, Ritesh Bhat, Manohara D. Jalageri, Yashaarth Kaushik e Aakif Budnar Kunjibettu. "A Review on Composite Materials for Energy Harvesting in Electric Vehicles". Energies 16, n. 8 (10 aprile 2023): 3348. http://dx.doi.org/10.3390/en16083348.
Testo completoAbstract (sommario):
The field of energy harvesting is expanding to power various devices, including electric vehicles, with energy derived from their surrounding environments. The unique mechanical and electrical qualities of composite materials make them ideal for energy harvesting applications, and they have shown tremendous promise in this area. Yet additional studies are needed to fully grasp the promise of composite materials for energy harvesting in electric vehicles. This article reviews composite materials used for energy harvesting in electric vehicles, discussing mechanical characteristics, electrical conductivity, thermal stability, and cost-effectiveness. As a bonus, it delves into using composites in piezoelectric, electromagnetic, and thermoelectric energy harvesters. The high strength-to-weight ratio provided by composite materials is a major benefit for energy harvesting. Especially important in electric vehicles, where saving weight means saving money at the pump and driving farther between charges, this quality is a boon to the field. Many composite materials and their possible uses in energy harvesting systems are discussed in the article. These composites include polymer-based composites, metal-based composites, bio-waste-based hybrid composites and cement-based composites. In addition to describing the promising applications of composite materials for energy harvesting in electric vehicles, the article delves into the obstacles that must be overcome before the technology can reach its full potential. Energy harvesting devices could be more effective and reliable if composite materials were cheaper and less prone to damage. Further study is also required to determine the durability and dependability of composite materials for use in energy harvesting. However, composite materials show promise for energy harvesting in E.V.s. Further study and development are required before their full potential can be realized. This article discusses the significant challenges and potential for future research and development in composite materials for energy harvesting in electric vehicles. It thoroughly evaluates the latest advances and trends in this field.
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Wu, Yulun. "Application of carbon fiber composite materials in aircraft". Applied and Computational Engineering 61, n. 1 (8 maggio 2024): 245–48. http://dx.doi.org/10.54254/2755-2721/61/20240969.
Testo completoAbstract (sommario):
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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Margarita, Valigun. "MODERN APPROACHES TO THE USE OF COMPOSITE MATERIALS IN CONSTRUCTION". American Journal of Engineering and Technology 6, n. 7 (1 luglio 2024): 57–65. http://dx.doi.org/10.37547/tajet/volume06issue07-07.
Testo completoAbstract (sommario):
A review of the literature on scientific approaches in the development of composite materials and building structures made of composites is carried out. When creating and manufacturing traditional and new composite materials, for example, by additive manufacturing, and when creating structures and structures in engineering calculations, new techniques, finite element computational software systems, and neural network technologies are used, which are used in the creation of modern metal and composite materials, analysis of mechanical characteristics of materials, forecasting loads on the structure, optimization of structures and calculation of their construction characteristics. The distinctive features of modern composite materials are shown. The main types of composite materials are considered: talc, diatomite, calcium carbonate, gibbsite, barium sulfate, feldspar, nepheline, aragonite, calcium carbonate, wool, silk, cotton, linen, jute, wood pulp, asbestos, fiberglass, metal fibers, quartz fibers, basalt fibers, polyamide fibers, polyester fibers, polyvinyl alcohol fibers, carbon fibers, viscose fibers. The physical and mechanical characteristics of composite materials (based on epoxy, aluminum, carbon, magnesium, and nickel matrices) and traditional (steel, aluminum, brick, concrete) building materials are presented. The disadvantages of such composite materials as carbon fiber, fiberglass, organoplastics, textolite, carbon concrete, and polystyrene concrete are presented. Deformation diagrams of some types of fibers for composite materials are considered: high-modulus carbon fibers, high-strength carbon fibers, aramid fibers, glass fibers, and basalt fibers. The advantages of the system of external reinforcement of building structures with composite materials are described. Examples of reinforcement of building structures are considered: reinforced concrete reinforcement; reinforcement of floor slabs; reinforcement of columns; and reinforcement of brick walls.
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Min, Kyung Ju, e Ho Sung Lee. "Composite Materials Characterization for Aircraft Application". Materials Science Forum 857 (maggio 2016): 169–73. http://dx.doi.org/10.4028/www.scientific.net/msf.857.169.
Testo completoAbstract (sommario):
Various composite materials have been developed for many of aircrafts feature and it is important to establish the composite materials characterization procedure based on the airworthiness requirement. Since properties of composites are a function of the properties of the constituent phases, their relative amounts, and processing methods, the overall processing must be carefully evaluated. This paper presents a composite materials evaluation procedure for composite aircraft and provide the effective statistical allowable to be approved by airworthiness certification agency. All material, specimens, fixtures and test results contained within this study were traceable and approved by the agency. In this study 8 different mechanical properties are obtained for 4 environmental conditions from 5 batches for robust sampling. By using modified coefficient of variation, the B-basis value of 0°tensile strength of carbon/epoxy unidirectional composite for elevated temperature/wet condition increases from 2,291MPa to 2,331MPa. The result would be applied to qualify domestic composite materials for aircraft within the level of a global standard.
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Bealer, Elizabeth J., Shola Onissema-Karimu, Ashley Rivera-Galletti, Maura Francis, Jason Wilkowski, David Salas-de la Cruz e Xiao Hu. "Protein–Polysaccharide Composite Materials: Fabrication and Applications". Polymers 12, n. 2 (17 febbraio 2020): 464. http://dx.doi.org/10.3390/polym12020464.
Testo completoAbstract (sommario):
Protein–polysaccharide composites have been known to show a wide range of applications in biomedical and green chemical fields. These composites have been fabricated into a variety of forms, such as films, fibers, particles, and gels, dependent upon their specific applications. Post treatments of these composites, such as enhancing chemical and physical changes, have been shown to favorably alter their structure and properties, allowing for specificity of medical treatments. Protein–polysaccharide composite materials introduce many opportunities to improve biological functions and contemporary technological functions. Current applications involving the replication of artificial tissues in tissue regeneration, wound therapy, effective drug delivery systems, and food colloids have benefited from protein–polysaccharide composite materials. Although there is limited research on the development of protein–polysaccharide composites, studies have proven their effectiveness and advantages amongst multiple fields. This review aims to provide insight on the elements of protein–polysaccharide complexes, how they are formed, and how they can be applied in modern material science and engineering.
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Abdelkarim, M. F., L. S. Nasrat, S. M. Elkhodary, A. M. Soliman, A. M. Hassan e S. H. Mansour. "Volume Resistivity and Mechanical Behavior of Epoxy Nanocomposite Materials". Engineering, Technology & Applied Science Research 5, n. 2 (20 aprile 2015): 775–80. http://dx.doi.org/10.48084/etasr.536.
Testo completoAbstract (sommario):
Electrical and mechanical properties of polymer composite materials are investigated through the determination of resistivity and hardness for composites samples. Epoxy composite samples have been prepared with different concentrations of certain inorganic fillers such as; Titanium dioxide (TiO2) and Silica (SiO2), of various size (micro, nano and hybrid) to study the electrical and mechanical behavior. The volume resistivity reaches 3.23×1014 ohm.cm for the micro silica composite. Surface of composite material has been mechanically examined by hardness test. The results show that the resistivity of microcomposites and nanocmposites are increased with the decrease of filler concentration. But the resistivity of hybrid composites is increased with the increase of filler concentration. Maximum hardness value was obtained from hybrid silica composite with 0.1% filler concentration.
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Gupta, B. P. "Micromechanical Property Prediction for Flexible Matrix Composite Materials". Journal of Engineering for Industry 109, n. 1 (1 febbraio 1987): 29–33. http://dx.doi.org/10.1115/1.3187089.
Testo completoAbstract (sommario):
Several closed-form solutions exit to predict elastic constants of a composite material. Most of these methods give comparable results for epoxy matrix composites, but not for flexible matrix composites, where the matrix is much softer than the fiber. We have devised a method that uses energy values given by finite element analyses of composite models, subjected to various independent displacement conditions. Results for flexible matrix composites thus obtained are compared with those determined by some of the existing methods. Closed-form solutions are recommended for approximate prediction of the different elastic constants by this comparison.
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Vanaerschot, Andy, Stephan Lomov, David Moens e Dirk Vandepitte. "Variability in Composite Materials Properties". Applied Mechanics and Materials 807 (novembre 2015): 23–33. http://dx.doi.org/10.4028/www.scientific.net/amm.807.23.
Testo completoAbstract (sommario):
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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Abdulrahman, Jibrilla, Williams S. Ebhota e Pavel Y. Tabakov. "Biopolymer Composite Materials in Oil and Gas Sector". International Journal of Polymer Science 2024 (21 febbraio 2024): 1–18. http://dx.doi.org/10.1155/2024/8584879.
Testo completoAbstract (sommario):
In the oil and gas industry, the demand for alternative materials is rising due to corrosion and the desire to reduce costs through weight reduction. Polymer composites are gaining attention for their corrosion resistance, favourable strength-to-weight ratio, and cost-effectiveness. The biopolymer composite is projected to have an output worth $4.95 billion between 2021 and 2025 and growth at a 5.38% compound annual growth rate. This review focuses on exploring the potential of natural fibres as reinforcement for biofibre polymer composite pipes in oil and gas, highlighting their ecofriendliness, biodegradability, and cost-efficiency. The paper assesses biopolymer composite pipes’ development, challenges, and applications, particularly those using continuous basalt and banana fibres. While basalt fibre has found field applications, banana fibre-reinforced polymer composites are still in the early research stages. Despite significant oil and gas industry players already endorsing polymer composites, further research is needed for biopolymer composites to address challenges like compatibility, environmental impact, standardisation, long-term durability, production processes, and regulatory acceptance. Advancing biocomposite research and exploring new research opportunities are essential for engineering advancements and advanced materials.
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Li, Geng. "Electrochemical Sensor under Nanostructured Materials". Key Engineering Materials 852 (luglio 2020): 70–79. http://dx.doi.org/10.4028/www.scientific.net/kem.852.70.
Testo completoAbstract (sommario):
In order to study the electrochemical sensor of nanometer mechanism materials to realize the high sensitive detection of different chemical molecules, in this research, the preparation methods of molybdenum dioxide nanomaterials, molybdenum dioxide/metal particles (Au, Pt, Au@Pt) composites and the preparation of molybdenum dioxide nanomaterials, molybdenum dioxide /Au composite nanomaterials, molybdenum dioxide /Pt composite nanomaterials and molybdenum dioxide /Au @Pt composite nanomaterials were introduced. Then the electrochemical behavior of several modified electrodes, electrochemical behavior in catechol system, scanning and pH were applied to the modified electrode. Finally, the electrode p-catechol system was detected by differential pulse voltammetry and the actual samples were analyzed. The results showed that compared with unmodified electrode materials, the electrode modified by molybdenum dioxide nanomaterials, molybdenum dioxide /Au composite nanomaterials, molybdenum dioxide /Pt composite nanomaterials and molybdenum dioxide /Au @Pt composite nanomaterials has better electrocatalytic performance and the detection of catechol has a good effect. Among them, the electrochemical sensor constructed by MoS2-Au@Pt composite has the best detection performance for catechol. The results have a good guiding significance for the performance improvement of electrochemical sensor.
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Sathish, S., T. Ganapathy e Thiyagarajan Bhoopathy. "Experimental Testing on Hybrid Composite Materials". Applied Mechanics and Materials 592-594 (luglio 2014): 339–43. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.339.
Testo completoAbstract (sommario):
In recent trend, the most used fiber reinforced composite is the glass fiber composite. The glass-fiber composites have high strength and mechanical properties but it is costlier than sisal and jute fiber. Though the availability of the sisal and jute fiber is more, it cannot be used for high strength applications. A high strength-low cost fiber may serve the purpose. This project focuses on the experimental testing of hybrid composite materials. The hybrid composite materials are manufactured using three different fibers - sisal, glass and jute with epoxy resin with weight ratio of fiber to resin as 30:70. Four combinations of composite materials viz., sisal-epoxy, jute-epoxy, sisal-glass-epoxy and sisal-jute-epoxy are manufactured to the ASTM (American Society for Testing and Materials) standards. The specimens are tested for their mechanical properties such as tensile and impact strength in Universal Testing machine. The results are compared with that of the individual properties of the glass fiber, sisal fiber, jute fiber composite and improvements in the strength-weight ratio and mechanical properties are studied.
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Pastuszak, Przemysław D., e Aleksander Muc. "Application of Composite Materials in Modern Constructions". Key Engineering Materials 542 (febbraio 2013): 119–29. http://dx.doi.org/10.4028/www.scientific.net/kem.542.119.
Testo completoAbstract (sommario):
The paper presents the general review of application of composite materials including the distinction of their specific features. Also short overview of history of composite materials is conducted. The major subject is the explanation, what is advantage of the composites over traditional materials. Additionally, a lot of examples demonstrate in which areas of current industry they are applied.
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Misirli, Cenk, Nilgün Becenen e Mümin Şahin. "An Investigation on Plastic Matrix Composite Materials". Applied Mechanics and Materials 555 (giugno 2014): 406–12. http://dx.doi.org/10.4028/www.scientific.net/amm.555.406.
Testo completoAbstract (sommario):
Composite materials with plastic matrix consist of a fiber material, which is used as the core and a matrix material, which forms the volumetric majority around that fiber material. Glass fiber reinforced plastics (GRP) are polymer-based plastic matrix composites that are used in a wide range of applications. In this work, a plastic-based composite material, which is used in tractor bonnets, was produced and thermal analysis and scanning electron microscopy (SEM) analysis of fracture surfaces for this material were performed. The SEM images of the fractured surfaces of the composites showed varied extents of fiber pull-outs under tensile failure modes. The nature of interfacial adhesion was discussed on the basis of the SEM study. A good correlation was established between the SEM study and the mechanical strength properties of the composites. However, it was observed that vinyl ester resin is a more suitable matrix for tractor bonnet parts due to its higher thermal resistance compared with orthophthalic resin. Keywords: composites, thermal analysis, scanning electron microscopy
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Newkirk, M. S., A. W. Urquhart, H. R. Zwicker e E. Breval. "Formation of LanxideTM ceramic composite materials". Journal of Materials Research 1, n. 1 (febbraio 1986): 81–89. http://dx.doi.org/10.1557/jmr.1986.0081.
Testo completoAbstract (sommario):
An overview is given of a new process that has been used successfully to make numerous ceramic/metal composite materials by directed oxidation of molten metallic precursors. As an example, the formation of A12O3/A1 composites from Al is discussed in detail.
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Zimcik, D. G. "Application of Composite Materials to Space Structures". Transactions of the Canadian Society for Mechanical Engineering 12, n. 2 (giugno 1988): 49–56. http://dx.doi.org/10.1139/tcsme-1988-0008.
Testo completoAbstract (sommario):
Advanced composite materials are playing an increasingly important role in the design and fabrication of high performance space structures. Composite materials may be tailored for a particular application to establish a unique combination of high specific stiffness and strength, dimensional stability and specific damping which makes these materials ideal candidates for many applications in the hostile space environment. Demonstrative examples of typical applications to primary structures and payloads, each with a different set of performance requirements, are presented in this paper. Unfortunately, the use of polymer matrix composites for very long exposure to space has not been without problems due to various environmental effects which are discussed. The use of metal matrix composites is proposed as a possible solution to the problem. However, an understanding of the fundamental properties of composites and their response to space environmental effects is essential before the full benefit of these materials can be realized.
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Koltsova, Tatiana, Elizaveta Bobrynina, Aleksei Vozniakovskii, Tatiana Larionova e Olga Klimova-Korsmik. "Thermal Conductivity of Composite Materials Copper-Fullerene Soot". Materials 15, n. 4 (14 febbraio 2022): 1415. http://dx.doi.org/10.3390/ma15041415.
Testo completoAbstract (sommario):
Copper-based composites strengthened with fullerene soot nanoparticles of 20–30 nm size in concentration up to 23 vol.% were prepared via two methods: mechanical mixing and molecular level mixing. The dependence of thermal conductivity on the carbon concentration was studied. Maxwell’s model describes well the change in the thermal conductivity of the composite obtained by molecular level mixing. However, thermal conductivity of the composite produced by mechanical mixing is significantly lower than the calculated values, due to structural inhomogeneity and residual stresses. Comparison of the thermal conductivity of Cu-fullerene soot composites with that of Cu-based composites described in the literature showed that the prepared materials are not inferior in thermal conductivity to composites containing carbon nanotubes, despite the fact that fullerene soot has a much lower thermal conductivity.
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Gümrük, Recep, Uğur Mazlum e R. A. W. Mines. "COMPRESSIVE MECHANICAL BEHAVIORS OF HYBRID COMPOSITE MATERIALS BASED ON MICRO LATTICE STRUCTURE AND RUBBERLIKE MATERIALS". Rubber Chemistry and Technology 88, n. 1 (1 marzo 2015): 147–62. http://dx.doi.org/10.5254/rct.14.86921.
Testo completoAbstract (sommario):
ABSTRACT This article investigates compressive and energy absorption characteristics for composites obtained by filling stainless steel micro lattice materials, manufactured via the selective laser melting method, with three different rubbers, including room temperature vulcanization silicone, natural rubber, and neoprene rubber. At the stage of building the composites with natural and neoprene rubbers, an experimental setup was designed for these two rubbers to be infiltrated into lattice spaces under vulcanization temperatures and high pressures. The results showed that the composites with silicone and neoprene matrix had a quite similar response as well as a seriously enhanced energy absorbing capacity and plateau stresses, in comparison with the corresponding lattice structures, for especially small sized lattice components. Also, the compression tests of the composite with natural rubber matrix clearly show that there should be no large differences between the individual mechanical properties of each component in the composite, and, in this way, the contribution of each component on the mechanical behavior of composite should be guaranteed to provide the satisfying performance.
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Khamidullaevna, Alimova Zebo, e Dauletbaeva Hulkar Ilkhomzhonovna. "RESEARCH OF POLYMER COMPOSITE MATERIALS BASED ON THERMOPLASTICS". European International Journal of Multidisciplinary Research and Management Studies 02, n. 06 (1 giugno 2022): 170–73. http://dx.doi.org/10.55640/eijmrms-02-06-33.
Testo completoAbstract (sommario):
The specific operating conditions of products made of thermoplastic materials necessitate targeted modification of polymer binders, which reduces the characteristic disadvantages of thermoplastics and enhances their advantages .The article examines some aspects of the use of composite materials based on thermoplastics. The most effective modifiers of polymer matrices, from the point of view of increasing their parameters of deformation-strength and tribotechnical characteristics, are components that prevent the development of thermo -oxidative destruction and tribocracking processes. In our opinion, the formed requirements for functional composite materials based on thermoplastics can be ensured by implementing the basic methodological principles, which consist in increasing the resistance to the effects of thermo oxidizing and operating environments and aging.
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MILLER, A., e P. B. STICKLER. "Composite Materials for the 787(PLENARY LECTURE I)". Proceedings of the JSME Materials and Processing Conference (M&P) 2005 (2005): 1. http://dx.doi.org/10.1299/jsmeintmp.2005.1_2.
Testo completo
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Kobayashi, Junya, Masahiro Kaneko, Chamaiporn Supachettapun, Kenji Takada, Tatsuo Kaneko, Joon Yang Kim, Minori Ishida, Mika Kawai e Tetsu Mitsumata. "Mechanical Properties and Reinforcement of Paper Sheets Composited with Carboxymethyl Cellulose". Polymers 16, n. 1 (26 dicembre 2023): 80. http://dx.doi.org/10.3390/polym16010080.
Testo completoAbstract (sommario):
The mechanical properties for paper sheets composited with glucose (Glc), methyl cellulose (MC), and carboxymethyl cellulose (CMC) were investigated. The paper composites were prepared by immersing paper sheets in aqueous solutions of these materials and drying at 100 °C for 30 min. The stress–strain curves for these paper composites were measured by a uniaxial tensile apparatus with a stretching speed of 2 mm/min. The breaking stress and strain for untreated paper were 24 MPa and 0.016, respectively. The paper composites demonstrated stress–strain curves similar to the untreated paper; however, the breaking point largely differed for these composites. The breaking strain and breaking stress for the Glc composite slightly decreased and those for the MC composite gradually increased with the concentration of materials composited. Significant increases in the mechanical properties were observed for the CMC composite. The breaking stress, breaking strain, and breaking energy for the 3 wt.% CMC composite were 2.0-, 3.9-, and 8.0-fold higher than those for untreated paper, respectively. SEM photographs indicated that the CMC penetrated into the inner part of the paper. These results strongly suggest that the mechanical improvement for CMC composites can be understood as an enhancement of the bond strength between the paper fibrils by CMC, which acts as a bonding agent. It was also revealed that the breaking strain, breaking stress, and breaking energy for the CMC composites were at maximum at the first cycle and decreased gradually as the immersion cycles increased.