Littérature scientifique sur le sujet « Composites material »

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Articles de revues sur le sujet "Composites material"

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Guo, Liang, Wenbin Tong, Yexin Xu et Hong Ye. « Composites with Excellent Insulation and High Adaptability for Lightweight Envelopes ». Energies 12, no 1 (25 décembre 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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Kala, Shiva Kumar, et Chennakesava Reddy Alavala. « Enhancement of Mechanical and Wear Behavior of ABS/Teflon Composites ». Trends in Sciences 19, no 9 (8 avril 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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Seng, De Wen. « Visualization of Composite Materials’ Microstructure with OpenGL ». Applied Mechanics and Materials 189 (juillet 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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Markovičová, Lenka, et Viera Zatkalíková. « Composites With Rubber Matrix And Ferrimagnetic Filling ». System Safety : Human - Technical Facility - Environment 1, no 1 (1 mars 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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Zhang, Jun, Zude Zhou, Fan Zhang, Yuegang Tan et Renhui Yi. « Molding process and properties of continuous carbon fiber three-dimensional printing ». Advances in Mechanical Engineering 11, no 3 (mars 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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Meisel, Nicholas Alexander, David A. Dillard et Christopher B. Williams. « Impact of material concentration and distribution on composite parts manufactured via multi-material jetting ». Rapid Prototyping Journal 24, no 5 (9 juillet 2018) : 872–79. http://dx.doi.org/10.1108/rpj-01-2017-0005.

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Purpose Material jetting approximates composite material properties through deposition of base materials in a dithered pattern. This microscale, voxel-based patterning leads to macroscale property changes, which must be understood to appropriately design for this additive manufacturing (AM) process. This paper aims to identify impacts on these composites’ viscoelastic properties due to changes in base material composition and distribution caused by incomplete dithering in small features. Design/methodology/approach Dynamic mechanical analysis (DMA) is used to measure viscoelastic properties of two base PolyJet materials and seven “digital materials”. This establishes the material design space enabled by voxel-by-voxel control. Specimens of decreasing width are tested to explore effects of feature width on dithering’s ability to approximate macroscale material properties; observed changes are correlated to multi-material distribution via an analysis of ingoing layers. Findings DMA shows storage and loss moduli of preset composites trending toward the iso-strain boundary as composition changes. An added iso-stress boundary defines the property space achievable with voxel-by-voxel control. Digital materials exhibit statistically significant changes in material properties when specimen width is under 2 mm. A quantified change in same-material droplet groupings in each composite’s voxel pattern shows that dithering requires a certain geometric size to accurately approximate macroscale properties. Originality/value This paper offers the first quantification of viscoelastic properties for digital materials with respect to material composition and identification of the composite design space enabled through voxel-by-voxel control. Additionally, it identifies a significant shift in material properties with respect to feature width due to dithering pattern changes. This establishes critical design for AM guidelines for engineers designing with digital materials.
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Markovičová, Lenka, et Viera Zatkalíková. « The Effect of Filler Content on the Mechanical Properties of Polymer Composite ». Applied Mechanics and Materials 858 (novembre 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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Huang, Fang. « Study on Mechanical Properties of Wood Plastic Composites ». Applied Mechanics and Materials 182-183 (juin 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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binti Mohd, Nurul Farah Adibah, Taufik Roni Sahroni et Mohammad Hafizudin Abd Kadir. « Feasibility Study of Casted Natural Fibre-LM6 Composites for Engineering Application ». Advanced Materials Research 903 (février 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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Manurung, Rokki, Sutan Simanjuntak, Jesayas Sembiring, Richard A. M. Napitupulu et 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 (5 novembre 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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Thèses sur le sujet "Composites material"

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Sinclair, Chad. « Co-deformation of a two-phase FCC/BCC material / ». *McMaster only, 2001.

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Siritanaratkul, Bhavin. « Enzyme-material composites for solar-driven reactions ». Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:55df8993-254b-4960-8ef4-fd9624206f3b.

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Using sunlight to drive chemical reactions has long been one of the goals in developing sustainable processes. Previous research has focused on solar fuel production in the form of H2, but this thesis demonstrates that solar-to-chemicals processes can be constructed to produce more complex compounds, using hybrid systems composed of enzymes and inorganic materials. Tetrachloroethene reductive dehalogenase (PceA), an enzyme that catalyzes the conversion of tetrachloroethene (PCE) to trichloroethene (TCE) and subsequently to cis-dichloroethene (cDCE), was shown to accept electrons from both graphite and TiO2 electrodes. Irradiation by UV light onto PceA-adsorbed TiO2 particles led to the selective production of TCE and cDCE, which was not possible without PceA as a catalyst. Ferredoxin-NADP+ reductase (FNR) is a key enzyme in photosynthesis, as it receives energetic electrons from Photosystem I and produces NADPH as an energy carrier for downstream 'Dark' reactions involving CO2 assimilation. This thesis presents the discovery of FNR activity on indium tin oxide (ITO) electrodes which led to direct electrochemical investigation of the properties of FNR, both in the absence and presence of its substrate, NADP+. The FNR-adsorbed electrode, termed 'the electrochemical leaf', rapidly interconverts NADP+/NADPH, and this was coupled to a downstream NADPH-dependent enzyme, thus demonstrating a new approach to cofactor regeneration for enzyme-catalyzed organic synthesis. The NADP+ reduction by FNR was also driven by light using a photoanode made of visible-light responsive semiconductors.
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Guodong, Xu. « Fibre-cement hybrid composites ». Thesis, University of Surrey, 1994. http://epubs.surrey.ac.uk/844012/.

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The theoretical stress-strain behaviour of individual fibre reinforced cement composites is reviewed. Based on the multiple cracking concept of the existing theory, analytical expressions are developed to describe the tensile stress-strain behaviour of a fibre-cement hybrid composite consisting of three components, i.e. two reinforcing fibres with different moduli, strengths and strains to failure and a common cement binder. The model predicts that the tensile stress-strain curve of the hybrid composites consists of five stages, instead of three stages of the existing models for individual fibre cements, and relates the tensile behaviour of each stage to the component properties of the components and the test system parameters. A description is given of the physical and mechanical properties of four types of reinforcing fibres used in the study. These were fibrillated polypropylene film, alkali-resistant glass, polyvinyl alcohol fibres and carbon fibres. A small number of direct tensile tests on continuous glass, carbon and polyvinyl alcohol were performed. The tensile stress-strain behaviour of four types of fibre-cement hybrid composites was studied with particular emphasis on that of the glass- polypropylene hybrids for which the flexural load-deflection behaviour was also examined. It is shown that the fibre-cement hybrid composites yield superior engineering properties over their parent composites and the improvements are sensitive to volume fractions of each of the two fibres. The measured tensile stress-strain curves of the hybrids were compared with the theoretical predictions and satisfactory agreement in general is obtained. Implications from the present work for the design of fibre-cement hybrid composites are assessed.
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Sacks, Serena. « Effects of thermal aging on the mechanical behavior of K3B matrix material and its relationship to composite behavior ». Thesis, Georgia Institute of Technology, 1997. http://hdl.handle.net/1853/18865.

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Teh, Kuen Tat. « Impact damage resistance and tolerance of advanced composite material systems ». Diss., This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-06062008-170512/.

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Marklund, Erik. « Micromechanism based material models for natural fiber composites / ». Luleå : Luleå University of Technology, 2005. http://epubl.luth.se/1402-1757/2005/84.

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Kruch, Serge. « Comportement global des materiaux composites viscoelastiques ». Paris 6, 1988. http://www.theses.fr/1988PA06A006.

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Apres un rappel de la theorie d'homogeneisation en elasticite, on developpe l'etude des lois de comportement viscoelastiques homogeneisees. Analyse du module complexe homogeneise. Application a l'etude du composite sic/sic
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Jack, David Abram. « Advanced analysis of short-fiber polymer composite material behavior ». Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4363.

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Thesis (Ph. D.) University of Missouri-Columbia, 2006.
The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 2, 2007) Includes bibliographical references.
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Foston, Marcus Bernard. « Cyclic, tethered and nanoparticulate silicones for material modification ». Diss., Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/24762.

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Thesis (Ph.D.)--Polymer, Textile and Fiber Engineering, Georgia Institute of Technology, 2009.
Committee Chair: Dr. Haskell W. Beckham; Committee Member: Dr. Anselm Griffin; Committee Member: Dr. Johannes Leisen; Committee Member: Dr. Sankar Nair; Committee Member: Dr. Uwe Bunz.
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Yar, Mazher Ahmed. « Development of Nanostructured Tungsten Based Composites for Energy Applications ». Doctoral thesis, KTH, Funktionella material, FNM, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101319.

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Tungsten (W) based materials can be used in fusion reactors due to several advantages. Different fabrication routes can be applied to develop tungsten materials with intended microstructure and properties for specific application including nanostructured grades. Therein, innovative chemical routes are unique in their approach owing numerous benefits. This thesis summarizes the development of W-based composites dispersed-strengthened by rare earth (RE) oxides and their evaluation for potential application as plasma facing armour material to be used in fusion reactor. Final material development was carried out in two steps; a) fabrication of nanostructured metallic tungsten powder dispersed with RE-oxides and b) powder sintering into bulk oxide-dispersed strengthened (ODS) composite by spark plasma process. With the help of advanced characterization tools applied at intermediate and final stages of the material development, powder fabrication and sintering conditions were optimized. The aim was to achieve a final material with a homogenous fine microstructure and improved properties, which can withstand under extreme conditions of high temperature plasma. Two groups of starting materials, synthesized via novel chemical methods, having different compositions were investigated. In the first group, APT-based powders doped with La or Y elements in similar ways, had identical particles’ morphology (up to 70 μm). The powders were processed into nanostructured composite powders under different reducing conditions and were characterized to investigate the effects on powder morphology and composition. The properties of sintered tungsten materials were improved with dispersion of La2O3 and Y2O3 in the respective order. The oxide dispersion was less homogeneous due to the fact that La or Y was not doped into APT particles. The second group, Ydoped tungstic acid-based powders synthesized through entirely different chemistry, contained nanocrystalline particles and highly uniform morphology. Hydrogen reduction of doped-tungstic acid compounds is complex, affecting the morphology and composition of the final powder. Hence, processing conditions are presented here which enable the separation of Y2O3 phase from Y-doped tungstic acid. Nevertheless, the oxide dispersion reduces the sinterability of tungsten powders, the fabricated nanostructured W-Y2O3 powders were sinterable into ultrafine ODS composites at temperatures as low as 1100 °C with highly homogeneous nano-oxide dispersion at W grain boundaries as well as inside the grain. The SPS parameters were investigated to achieve higher density with optimum finer microstructure and higher hardness. The elastic and fracture properties of the developed ODS-W have been investigated by micro-mechanical testing to estimate the materials’ mechanical response with respect to varying density and grain size. In contrast from some literature results, coarse grained ODS-W material demonstrated better properties. The developed ODS material with 1.2 Y2O3 dispersion were finally subjected to high heat flux tests in the electron beam facility “JUDITH-1”. The samples were loaded under ELM-like thermal-shocks at varying base temperatures up to an absorbed power density of 1.13 GW/m2, for armour material evaluation. Post mortem characterizations and comparison with other reference W grades, suggest lowering the oxide contents below 0.3 wt. % Y2O3. As an overview of the study conducted, it can be concluded that innovative chemical routes can be potential replacement to produce tungsten based materials of various composition and microstructure, for fusion reactor applications. The methods being cheap and reproducible, are also easy to handle for large production at industrial scale.

QC 20120827

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Livres sur le sujet "Composites material"

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Sundarkrishnaa, K. L. Friction Material Composites : Materials Perspective. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012.

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author, Gupta A. C., dir. Polymer composites. London : New Academic Science, 2019.

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Sundarkrishnaa, K. L. Friction Material Composites. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33451-1.

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Sundarkrishnaa, K. L. Friction Material Composites. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-14069-8.

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Yosomiya, Ryūtoku. Adhesion and bonding in composites. New York : M. Dekker, 1990.

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J, Reinhart Theodore, Dostal Cyril A et ASM Handbook Committee., dir. Composites. Metals Park, Ohio : ASM International, 1987.

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M, Gammon Luther, dir. Optical microscopy of fiber reinforced composites. Materials Park, Ohio : ASM International, 2010.

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Composites manufacturing : Materials, product, and process engineering. Boca Raton, FL : CRC Press, 2002.

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Pierre, Delhaes, dir. Fibers and composites. London : Taylor & Francis, 2003.

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G, Wouters Tobias, dir. Leading-edge composite material research. New York : Nova Science Publishers, 2008.

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Chapitres de livres sur le sujet "Composites material"

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Beorkrem, Christopher. « Composites/Plastics ». Dans Material Strategies in Digital Fabrication, 166–69. Names : Beorkrem, Christopher, author. Title : Material strategies in digital fabrication / Christopher Beorkrem. Description : Second edition. | New York : Routledge, 2017. : Routledge, 2017. http://dx.doi.org/10.4324/9781315623368-32.

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Sundarkrishnaa, K. L. « Design Essentials—Friction Material Composite System ». Dans Friction Material Composites, 63–85. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33451-1_2.

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Sundarkrishnaa, K. L. « Design Essentials—Friction Material Composite System ». Dans Friction Material Composites, 75–98. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-14069-8_2.

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Sundarkrishnaa, K. L. « Frictional Force—Introduction ». Dans Friction Material Composites, 1–61. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33451-1_1.

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Sundarkrishnaa, K. L. « Test Requirements in an Automotive BFMC Design ». Dans Friction Material Composites, 291–320. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33451-1_10.

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Sundarkrishnaa, K. L. « Rolling Motion ». Dans Friction Material Composites, 87–114. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33451-1_3.

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Sundarkrishnaa, K. L. « Formulation Design ». Dans Friction Material Composites, 115–72. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33451-1_4.

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Sundarkrishnaa, K. L. « Design of Experiments ». Dans Friction Material Composites, 173–83. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33451-1_5.

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Sundarkrishnaa, K. L. « BFMC—Processing ». Dans Friction Material Composites, 185–252. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33451-1_6.

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Sundarkrishnaa, K. L. « BFMC—Formulations and Processes ». Dans Friction Material Composites, 253–65. Berlin, Heidelberg : Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-33451-1_7.

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Actes de conférences sur le sujet "Composites material"

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PAYNE, NICHOLAS, et KISHORE POCHIRAJU. « A Methodology for Characterization of Material Constants for Strain-locking Materials ». Dans American Society for Composites 2017. Lancaster, PA : DEStech Publications, Inc., 2017. http://dx.doi.org/10.12783/asc2017/15383.

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NELSON, JARED W., RONALD B. BUCINELL et DANIEL WALCZYK. « Bio-Industrial Materials Institute : Characterization of Natural Fiber Material Property Variability ». Dans American Society for Composites 2019. Lancaster, PA : DEStech Publications, Inc., 2019. http://dx.doi.org/10.12783/asc34/31325.

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Allen, Emily A., Lee D. Taylor et John P. Swensen. « Smart Material Composites for Discrete Stiffness Materials ». Dans ASME 2018 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/smasis2018-8203.

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This paper presents an initial step towards a new class of soft robotics materials, where localized, geometric patterning of smart materials can exhibit discrete levels of stiffness through the combinations of smart materials used. This work is inspired by a variety of biological systems where actuation is accomplished by modulating the local stiffness in conjunction with muscle contractions. Whereas most biological systems use hydrostatic mechanisms to achieve stiffness variability, and many robotic systems have mimicked this mechanism, this work aims to use smart materials to achieve this stiffness variability. Here we present the compositing of the low melting point Field’s metal, shape memory alloy Nitinol, and a low melting point thermoplastic Polycaprolactone (PCL), composited in simple beam structure within silicone rubber. The comparison in bending stiffnesses at different temperatures, which reside between the activation temperatures of the composited smart materials demonstrates the ability to achieve discrete levels of stiffnesses within the soft robotic tissue.
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Yamamoto, K., M. Somemiya, S. Matsubara, N. Hirayama et K. Terada. « Distortional Hardening Material Model for Unidirectioally Reinforced CFRTP Considered from the Results of Numerical Material Testing ». Dans VIII Conference on Mechanical Response of Composites. CIMNE, 2021. http://dx.doi.org/10.23967/composites.2021.055.

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Miot, S., L. Barriere, J. Casero et M. Lozzo. « Virtual Testing Integration and Material Allowables Generation ». Dans VIII Conference on Mechanical Response of Composites. CIMNE, 2021. http://dx.doi.org/10.23967/composites.2021.013.

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FENG, HAOTIAN, et PAVANA PRABHAKAR. « Deep Reinforcement Learning for Composite Material Optimization ». Dans American Society for Composites 2020. Lancaster, PA : DEStech Publications, Inc., 2020. http://dx.doi.org/10.12783/asc35/34901.

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CHERUET, ANTHONY, et BOBBY COOK. « Material Simulation’s Advantage : An illustration with 3D Woven ». Dans American Society for Composites 2018. Lancaster, PA : DEStech Publications, Inc., 2018. http://dx.doi.org/10.12783/asc33/25934.

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BABER, FORREST, BRIAN JUSTUSSON, VIPUL RANATUNGA, JOSEPH SCHAEFER et IBRAHIM GUVEN. « A Numerical Approach for Determining Peridynamic Material Parameters ». Dans American Society for Composites 2019. Lancaster, PA : DEStech Publications, Inc., 2019. http://dx.doi.org/10.12783/asc34/31274.

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KUNDURTHI, SARATCHANDRA, et MAHMOODUL HAQ. « Tailoring Substrate Stiffness in Bi-Material Adhesive Joints ». Dans American Society for Composites 2019. Lancaster, PA : DEStech Publications, Inc., 2019. http://dx.doi.org/10.12783/asc34/31290.

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Klosowicz, Stanislaw J. « Material properties of PDLC composites ». Dans Nonlinear Optics of Liquid and Photorefractive Crystals, sous la direction de Gertruda V. Klimusheva et Andrey G. Iljin. SPIE, 1996. http://dx.doi.org/10.1117/12.239193.

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Rapports d'organisations sur le sujet "Composites material"

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Norris, Robert, Cliff Eberle, Christopher Pastore, Thomas Sudbury, Fue Xiong et David Hartman. Multi-material Preforming of Structural Composites. Office of Scientific and Technical Information (OSTI), mai 2015. http://dx.doi.org/10.2172/1221729.

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Barnes, Eftihia, Jennifer Jefcoat, Erik Alberts, Hannah Peel, L. Mimum, J, Buchanan, Xin Guan et al. Synthesis and characterization of biological nanomaterial/poly(vinylidene fluoride) composites. Engineer Research and Development Center (U.S.), septembre 2021. http://dx.doi.org/10.21079/11681/42132.

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The properties of composite materials are strongly influenced by both the physical and chemical properties of their individual constituents, as well as the interactions between them. For nanocomposites, the incorporation of nano-sized dopants inside a host material matrix can lead to significant improvements in mechanical strength, toughness, thermal or electrical conductivity, etc. In this work, the effect of cellulose nanofibrils on the structure and mechanical properties of cellulose nanofibril poly(vinylidene fluoride) (PVDF) composite films was investigated. Cellulose is one of the most abundant organic polymers with superior mechanical properties and readily functionalized surfaces. Under the current processing conditions, cellulose nanofibrils, as-received and 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidized, alter the crystallinity and mechanical properties of the composite films while not inducing a crystalline phase transformation on the 𝛾 phase PVDF composites. Composite films obtained from hydrated cellulose nanofibrils remain in a majority 𝛾 phase, but also exhibit a small, yet detectable fraction of 𝛼 and ß PVDF phases.
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Grujicic, Mica. Multi-length Scale Material Model Development for Armorgrade Composites. Fort Belvoir, VA : Defense Technical Information Center, mai 2014. http://dx.doi.org/10.21236/ada605327.

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Kennedy, Alan, Mark Ballentine, Andrew McQueen, Christopher Griggs, Arit Das et Michael Bortner. Environmental applications of 3D printing polymer composites for dredging operations. Engineer Research and Development Center (U.S.), janvier 2021. http://dx.doi.org/10.21079/11681/39341.

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This Dredging Operations Environmental Research (DOER) technical note disseminates novel methods to monitor and reduce contaminant mobility and bioavailability in water, sediments, and soils. These method advancements are enabled by additive manufacturing (i.e., three-dimensional [3D] printing) to deploy and retrieve materials that adsorb contaminants that are traditionally applied as unbound powders. Examples of sorbents added as amendments for remediation of contaminated sediments include activated carbon, biochar, biopolymers, zeolite, and sand caps. Figure 1 provides examples of sorbent and photocatalytic particles successfully compounded and 3D printed using polylactic acid as a binder. Additional adsorptive materials may be applicable and photocatalytic materials (Friedmann et al. 2019) may be applied to degrade contaminants of concern into less hazardous forms. This technical note further describes opportunities for U.S. Army Corps of Engineers (USACE) project managers and the water and sediment resource management community to apply 3D printing of polymers containing adsorptive filler materials as a prototyping tool and as an on-site, on-demand manufacturing capability to remediate and monitor contaminants in the environment. This research was funded by DOER project 19-13, titled “3D Printed Design for Remediation and Monitoring of Dredged Material.”
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RA Wolf. Carbon-Carbon Composites as Recuperator Material for Direct Gas Brayton Systems. Office of Scientific and Technical Information (OSTI), juillet 2006. http://dx.doi.org/10.2172/884666.

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Coppola, Anthony, Omar Faruque, James F. Truskin, Derek Board, Martin Jones, Jian Tao, Yijung Chen et Manish Mehta. Validation of Material Models For Automotive Carbon Fiber Composite Structures Via Physical And Crash Testing (VMM Composites Project). Office of Scientific and Technical Information (OSTI), septembre 2017. http://dx.doi.org/10.2172/1395831.

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Whisler, Daniel, Rafael Gomez Consarnau et Ryan Coy. Novel Eco-Friendly, Recycled Composites for Improved CA Road Surfaces. Mineta Transportation Institute, juillet 2021. http://dx.doi.org/10.31979/mti.2021.2046.

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The continued use of structural plastics in consumer products, industry, and transportation represents a potential source for durable, long lasting, and recyclable roadways. Costs to dispose of reinforced plastics can be similar to procuring new asphalt with mechanical performance exceeding that of the traditional road surface. This project examines improved material development times by leveraging advanced computational material models based on validated experimental data. By testing traditional asphalt and select carbon and glass reinforced composites, both new and recycled, it is possible to develop a finite element simulation that can predict the material characteristics under a number of loads virtually, and with less lead time compared to experimental testing. From the tested specimens, composites show minimal strength degradation when recycled and used within the asphalt design envelopes considered, with an average of 49% less wear, two orders of magnitude higher compressive strength, and three orders for tensile strength. Predictive computational analysis using the validated material models developed for this investigation confirms the long-term durability.
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Karpur, Prasanna. Nondestructive Methods for Evaluating Damage Evolution and Material Behavior in Metal Matrix Composites. Fort Belvoir, VA : Defense Technical Information Center, février 1997. http://dx.doi.org/10.21236/ada329643.

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Siranosian, Antranik Antonio, Philip Edward Schembri et Darby Jon Luscher. Proposal of a Novel Approach to Developing Material Models for Micro-scale Composites Based on Testing and Modeling of Macro-scale Composites. Office of Scientific and Technical Information (OSTI), avril 2016. http://dx.doi.org/10.2172/1249008.

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Alexander, A., J. T. Tzeng, W. H. Drysdale et B. P. Burns. Effective Three-Dimensional (3-D) Finite Element Material Stiffness Formulation for Modeling Laminated Composites. Fort Belvoir, VA : Defense Technical Information Center, avril 1996. http://dx.doi.org/10.21236/ada306454.

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