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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"composite matrix"”.
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Characterization of Thermoplastic Polyamide Composite Matrix Material
Although thermoplastic matrix composites are being proposed as a second generation of composite material for a number of advanced and high performance applications, little has been reported concerning the processing-structure-property relationships for either the newly developed matrix resins or …
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The Z axis and its composite matrix of perception
… mental space, these perceptions constitute a composite matrix of perception. When we navigate physical spaces, we are navigating ideas, and when we maneuver ideas we maneuver spaces. Ideologies form when the organization of this composite matrix crystallizes, refusing to adjust to new ideas or …
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The selection of adhesives and composite matrix resins for aircraft repairs
… energy data clearly separated the brittle composite "matrix resins" from the tougher "adhesives" • It was concluded that matrix resins and adhesives can be more easily and effectively compared using the fundamental properties of the resins themselves than by using the limited data normally …
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Structure-property behavior of novel high performance thermoplastic and thermoset structural adhesives and composite matrix resins
… networks suitable for structural adhesives and matrix resins have been identified. This was proven by characterization of these novel networks. Ninety-nine percent gel fraction networks were observed after cure at 380°C for 60 minutes. Thermomechanical properties such as tensile properties, …
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The fabrication of carbon-fiber composites by aqueous suspension prepregging with larc-tpi and peek
… and binding agent and its interactions with the composite matrix are assessed. A time-temperature-pressure consolidation cycle was designed for PEEK prepreg. Two thermoplastic polymers were studied : LaRC-TPI, provided by Mitsui Toatsu Chemicals, and Poly(etheretherketone), synthesized in …
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Influence of rearrangement of actin cytoskeleton on the overall material properties of ATDC5 cells during chondrogenesis
… model of cell. The cell was considered as a composite matrix and the actin as the embedded fibers. Radial deformations of the cell (difference in the corresponding undeformed and deformed radii of the cell at a particular angle w.r.t. loading axis) were calculated for 5 sets of experimental …
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Toughening of cyanate ester networks with reactive thermoplastic modifiers
… candidates for high temperature adhesives and composite matrices. Low toughness is a major drawback with most crosslinked thermosetting materials, including the cyanate ester networks. Considerable attention has been devoted to the aspect of toughening such brittle networks in our laboratories. …
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High performance thermoplastic matrix composite processing: dry powder prepregging, plasma treatment, consolidation/crystallization analysis
… responsible for the birth and growth of the composites industry, is now responsible for the drive to produce composites which outperform those used today. A great deal of this interest lies in the use of thermoplastic polymers as the composite matrix. Thermoplastics offer the potential of …
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An investigation of the interfacial characteristics of nitinol fibers in a thermoset composite
… by means of active control, frequently utilize composite materials as the skeletal structure. In order for composite materials to be utilized in intelligent material systems to their utmost capability, many material properties, including the interfacial shear strength between the embedded sensor …
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The characterization of thermoplastic starch (TPS) reinforced with banana peel (BP) Polymer composites
… (TPS) reinforced with banana peel (BP) polymer composites. Recently, various studies have centred more on the use of polymer composite where thermoplastic starch (TPS) has received significant attention to behave as the composite matrix due to its degradable nature. In the meantime, numerous …
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Composite materials made of chitosan and nanosized apatite : preparation and physicochemical characterization
Taking inspiration from nature, where composite materials made of a polymer matrix and inorganic fillers are often found, e.g. bone, shell of crustaceans, shell of eggs, etc., the feasibility on making composite materials containing chitosan and nanosized hydroxyapatite were investigated. A new …
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Model-based optimization of ultra high performance concrete highway bridge girders
… material model, in which the brittle-plastic composite matrix and the elasto-plastic composite fiber reinforcement are modeled as two distinct and interacting phases, using a minimal number of model input parameters that are all accessible by a single notched tensile test. The UHPC model is …
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Processing of toughened cyanate ester matrix composites
… as candidate materials for high performance composite matrix applications. The resin investigated was a Bisphenol-A cyanate ester toughened with hydroxy functionalized phenolphthalein based amorphous poly(arylene ether sulfone). The thermoplastic modified toughened networks exhibited …
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Novel Novolac-Phthalonitrile and Siloxane-Phthalonitrile Resins cured with low melting Novolac Oligomers for Flame Retardant Structural Thermosets
… materials appealing for use in carbon-carbon composites. Post-curing these networks at 200 ºC for 1h, and then at 225 ºC for 4h, resulted in high thermo-oxidative stability, with a 5% weight loss observed at 447 ºC and 50 % char at 800 ºC. Blending tetramethyldisiloxane phthalonitrile monomers …
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Self-sealing of thermal fatigue and mechanical damage in fiber-reinforced composite materials
Fiber reinforced composite tanks provide a promising method of storage for liquid oxygen and hydrogen for aerospace applications. The inherent thermal fatigue of these vessels leads to the formation of microcracks, which allow gas phase leakage across the tank walls. In this dissertation, …
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Influences on nanocomposite structural performance: experimental study on materials processing and bonding
Nanocomposites have been widely reported to enhance performance in polymers, in both<br/>mechanical and physical properties. An increasing amount of research has resulted in many<br/>nanocomposite polymers being applied to various consumer products from motorcars to golf<br/>balls. Yet, at this …
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Ordered macroporous metal oxides and carbonaceous composites for Li-ion and beyond Li-ion batteries
… batteries. Exploring the potential of composite structures, this research focuses on TiO2/GeO2 nanocomposites and C/TiO2 inverse opal anodes in Li-ion batteries, and carbon inverse opal anodes in Na-ion and K-ion batteries. Employing comprehensive characterization techniques, this …
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The Adhesion Strength of a Plasma Sprayed Silicon Bond Coating on a Silicon Carbide Ceramic Matrix Composite
Silicon-based ceramics and ceramic matrix composites (CMCs), such as silicon carbide (SiC) fiber reinforced SiC, are promising candidates for hot section components in next generation turbine engines. Environmental barrier coatings (EBCs) are essential for implementing these components as they …
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Caratterizzazione di membrane metalliche e ionomeriche per applicazioni energetiche
… A model that considers the PFSI membrane as a composite matrix with a hydrophilic and a hydrophobic phase was considered allowing to estimate the variation of gas permeability with relative humidity on the basis of the permeability in the dry PFSI membrane and in pure liquid water.
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Interfacial and Physical Confinement Effects on the Structure and Properties of Aligned Carbon Nanotube Architectures
… their use as shape-engineerable materials and composite reinforcement. While controlling nanofiber adhesion to the growth substrate and nanofiber packing density in arrays, e.g. aligned-CNT (A-CNT) arrays in this work, are essential for improving material properties towards bulk-scale …