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Showing 1 to 20 of 23 for “"Resin Flow"”.
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Measurement of resin pressure in composite laminates during cure
A promising method of measuring the resin pressure within a composite laminate during processing has been developed. This method can be used to investigate the control of voids, or resin flow and laminate compaction in several composite material processing methods such as ACND, hot press curing and …
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Processing parameters and chamber length impact on detached die and attached die resin injection pultrusion
… are pull speed, fiber volume fraction, resin viscosity, injection port location and compression ratio. 3-D finite volume technique is used to simulate the liquid resin flow through the fiber reinforcement in the injection pultrusion process. The purpose of the present work is to …
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Impact of Design Parameters on Detached-Die Tapered Resin Injection Pultrusion
… of the detached-die with the attached-die resin injection chamber configurations. In this work the impact of various geometric design parameters (the length of the injection chamber, slot width, multiple injection slot locations, and part thickness) on the performances and complete wetout …
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Modeling the pultrusion process to obtain low void fraction composites
… can be reduced. The goal is to promote uniform resin flow through the glass fibers, while the part is still in the die; this is because increasing resin flow in the die should result in fewer voids in the final product.;To achieve this objective, an existing pultrusion process was analyzed by …
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Fiber tension loss during the winding and cure of a filament wound composite case
… slippage and clumping can occur. The resulting resin rich areas can significantly decrease the strength of the composite case. The objectives of the present investigation were 1) to measure the change in fiber tension during the winding and cure of a composite case wound with prepreg material, …
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Vacuum Assisted Resin Transfer Molding (VARTM): Model Development and Verification
… investigation, a comprehensive Vacuum Assisted Resin Transfer Molding (VARTM) process simulation model was developed and verified. The model incorporates resin flow through the preform, compaction and relaxation of the preform, and viscosity and cure kinetics of the resin. The computer model can …
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Parameter establishment and verification of a fabrication stress model and a thermo-kinetic cure model for filament wound structures
… is a thermo-kinetic model. FWCURE models the resin viscosity, percent of cure, temperature, resin flow, and layer location. As these characteristics change, they have an effect on the fiber tension within the composite. The "Winding and Curing Stress Analysis Finite Element" (WACSAFE) code …
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Development and verification of a resin film infusion/resin transfer molding simulation model for fabrication of advanced textile composites
… computer model for the simulation of the resin transfer molding/resin film infusion processing of advanced composite materials. This computer simulation model is designed to provide aircraft structure and tool designers with a method of predicting the infiltration and curing behavior of a …
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Compaction and Cure of Resin Film Infusion Prepregs
… the cure and consolidation of prepregs used for resin film infusion. Resin kinetics, rheology, flow and fiber deformation are considered. Resin kinetics are simulated with an isothermal autocatalytic-1 type relation. The non-Newtonian viscosity of the Cytec™ 754 resin is represented with a gel …
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Experimental and theoretical investigation of the curing process of thermosetting composite structures with angle-bend
… heat transfer, viscosity, extent of cure, and resin flow submodels. Matrix material properties were allowed to vary with temperature. As a result, various cure parameters such as temperature, degree of cure, viscosity, compaction and fiber volume fraction were examined. A first set of …
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Fiber compaction and wetout in tapered resin injection pultrusion manufacturing
… section. Reinforced fibers are pulled through a resin, possibly folloby a separate injection chamber preforming system, and into a heated die, where the resin undergoes complete wetout. Thus the required pultruded composite is obtained in the desired profile. The main objective of this research …
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Interfacial strength development in thermoplastic resins and fiber-reinforced thermoplastic composites
… strength development in amorphous thermoplastic resins and fiber-reinforced thermoplastic prepregs. All tests were performed using polysulfone P1700 thermoplastic resin and AS4/P1700 graphite-polysulfone prepreg. Two test methods were examined to measure autohesion in neat resin samples. These …
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Fiber Reinforcement Compaction In Resin Injection Pultrusion Process
Resin injection pultrusion is a cost-effective continuous manufacturing process to produce composites of constant cross-section. In this process, fiber reinforcements are continuously pulled through the injection chamber where liquid resin is injected to cause complete wetout of the fibers before …
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Thermoplastic composite consolidation
… prepreg surface topology characterization with a resin flow analysis. Both unidirectional and cross-ply lay-ups were modeled. Two-ply unidirectional laminae fabricated from graphite-polysulfone and graphite-PEEK prepregs and [0/90/0]<sub>T</sub> laminates were consolidated using different …
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Colloidal Stability, Rheology, and Flexural Strength of Antiviral 3D Printable Colloids
… with varied amounts of FS in a 3D printable resin. Flow distance of the colloids were measured as a function of time (6 months) to determine the stability of the colloids. The viscosity of each mixture was measured for 90 seconds using a rheometer at 1, 10, and 25 RPM. Flexural-strength of …
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A process simulation model for the manufacture of composite laminates from fiber-reinforced, polyimide matrix prepreg materials
… be used to determine the degree of crosslinking, resin melt viscosity, temperature, and the resin pressure inside the composite during the consolidation process. Also, the model is used to predict the total resin flow, thickness change, and total process time. The simulation model was solved by a …
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Verification of a three-dimensional resin transfer molding process simulation model
… finite element model simulating the resin flow and cure through an orthotropic fabric preform. The material characterizations completed include resin kinetics and viscosity models, as well as preform permeability and compaction models. The steady-state and advancing front permeability …
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Verification of a Three-Dimensional Resin Film Infusion Process Simulation Model
… the verification of a three-dimensional resin transfer molding/resin film infusion (RTM/RFI) process simulation model. The model incorporates resin flow through an anisotropic carbon fiber preform, cure kinetics of the resin, and heat transfer within the preform/tool assembly. The …
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Investigations on Void Formation in Composite Molding Processes and Structural Damping in Fiber-Reinforced Composites with Nanoscale Reinforcements
… molding techniques, such as injection molding or resin transfer molding. One significant issue during these processing methods is void formation due to incomplete wet-out of the resin within the fiber preform, resulting in discontinuous material properties and localized failure zones in the …
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AN INTEGRATED CAD TOOL BASED ON DESIGN INTENT
… configuration and specification; (b) parameteric resin flow path design; (c) instantiation and dimensional variation of the mould body assembly; (d) instantiation and variation of inter-penetrating mould components; and, (e) pre-manufacturing planning information generation. The output of the …
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