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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 12 of 12 for “"out-of-autoclave"”.
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Nanomaterial-Enabled Out-of-Autoclave and Out-of-Oven Manufacturing of Fiber Reinforced Polymer Composites
… polymer composite materials have been a staple of the aerospace industry, integral to creating lightweight flight vehicles due to their high specific material properties. These materials often come in a prepreg form, where microfibers are pre-impregnated with a polymer matrix to form lamina that …
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Out of autoclave manufacturing of cfrps having multiscale reinforcement for improved interlaminar fracture toughness and multifunctional characteristics
… due to their laminated structure appear poor out-of-plane properties due to the absence of through-thickness reinforcement. Additionally, their low polymer matrix toughness leads to interlaminar failures such as delamination. Delaminations as a primary failure mode are resulted either from …
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Fundamental Behavior of Nanoporous Networks in the Out-of-Autoclave Manufacturing of Carbon Fiber Reinforced Polymer Composites
Throughout the aerospace industry, carbon fiber reinforced polymer (CFRP) laminated composites are used extensively in spacecraft and aircraft vehicles due to their high specific strength and stiffness and other properties. Processing these advanced structural CFRP composites, especially in prepreg …
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Effects of Shallow Bi-Angle, Thin-Ply Laminates on the Structural Performance of Composite Wings
In this study, we investigate the enhancement of mechanical properties that shallow bi-angle, thin-ply laminates bring to fiber reinforced polymer composites. Coupon- and structural-level tests are conducted along with numerical simulations. According to the coupon tests, we find that shallow …
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Advanced composites using non-autoclave processes: manufacturing and characterization
<p>"The objective of the present study is to develop non-autoclave processes to manufacture high performance composites for aerospace applications. In Paper 1, vacuum assisted resin transfer molding (VARTM) process was developed for elevated temperature composites. Use of VARTM process for …
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A Comparison of Crushing Parameters of Graphite Composite Thin-Walled Cylinders Cured in Low and High Pressures
<p>Out-of-Autoclave (OoA) processes for manufacturing aerospace-grade parts needs to be better understood to further the development and success of industries that are manufacturing reusable launch vehicles, military and commercial aircraft, and spacecraft. Overcoming the performance limitations …
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Manufacturing of advanced continuous fiber reinforced composites for high temperature applications
… effects. The current work is on the development of processes to produce continuous fiber reinforced materials from two state of the art resin systems. Two processes were developed to produce continuous fiber reinforced ceramic materials from a preceramic polymer. The first was a vacuum forming …
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Physical finite elements
… function from a mass-produced construction kit of parts, is indeed an exciting vision. The ability to decouple conventionally linked material properties and reach new territory in parameter space has already been demonstrated [12] by the fabrication of ultralight samples with extreme specific …
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Performance analysis of a reduced cost manufacturing process for composite aircraft secondary structure
… reinforced polymer (FRP) composites are known to offer weight savings over<br/>traditional metallic components, due to their excellent stiffness and strength to weight ratios.<br/>However, the major limiting factor for the use of aerospace quality composites is the<br/>manufacturing cost. The …
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Micro-computed tomography for interlaminar analysis, void quantification, and feature localization in carbon fiber composites
… subjectivity compared to extant CT analysis of composites. The developed tools extract micron-scale morphological information in three dimensions for laminated advanced composite structures, specifically unidirectional prepreg aerospace-grade carbon fiber reinforced plastic (CFRP) laminated …
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Manufacturing of thermosetting polymers and composites using frontal polymerization: A numerical study
… and will be integral to the next generation of lightweight, energy-e cient structures owing to their excellent specific stiffness and strength, thermal stability and chemical resistance. Yet, the wider use of highperformance thermoset composites is limited by the complexity and cost of the …
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Nanomaterial-enabled manufacturing for next-generation multifunctional advanced composite prepreg laminate architectures
Manufacturing of advanced aerospace-grade structural composites has traditionally utilized autoclaves to impart heat and pressure, in addition to vacuum, to create high-quality, void (defect)- free, reproducible structures. Carbon (micro) fiber reinforced polymer (CFRP) composites, which are …