Resin Transfer Molding (RTM) has drawn interest in recent years as an attractive technique for the manufacture of advanced ber reinforced composite materials. A major issue in this new manufacturing process is the reduction of voids during the resin ll process so that products with high quality are manufactured. Process modeling is particularly useful in understanding, designing, and optimizing...

This investigation completed 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 computer model can predict the flow front location, resin pressure distribution, and t...

This research aimed to determine riveted carbon/epoxy composites’ mechanical performance when fabricated by resin transfer molding (RTM). As this manufacturing process is gaining importance in the aeronautics and automotive industries, assembly methods their reliability must be studied terms of airworthiness transportation implementation. The study case resumes determination bearing strength RT...

Abstract: This paper presents the results of experimental determination of fiber bed permeability variation with porosity. Flow measurement experiments were designed to measure fiber mat permeability for fiber beds with various fiber volume fractions. Woven fiberglass, chopped fiberglass, and carbon fiber mats were used as reinforcements. The effects of reinforcement type and porosity on fiber ...

In this study, three novel thermoplastic impregnation processes were analyzed towards automotive applications. The first process is compression resin transfer molding in which a glass fiber mat impregnated through thickness by polymer. second melt-thermoplastic Resin Transfer Molding (RTM) the fibers are plane with help of spacer. third process, stamp forming hybrid bicomponent fibers, coats in...

This paper presents a multi-scale thermo-chemo-mechanical simulation predicting the distortion of 3D woven composite part manufactured using Resin Transfer Molding (RTM) process. The numerical procedure relied on an anisotropic temperature- and degree cure-dependent viscoelastic constitutive law whose parameters were obtained from experimental data blackbox optimization algorithm. Analytical (a...

NASA has been a leader in development of composite materials for aircraft applications during the past 25 years. In the early 1980’s NASA and others conducted research to improve damage tolerance of composite structures through the use of toughened resins but these resins were not costeffective. The aircraft industry wanted affordable, robust structures that could withstand the rigors of flight...

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The use of fiber reinforced plastics (FRPs) has significant potential to reduce the weight components. As regards sustainability these components, thermoplastic matrices offer more for recycling than thermoset ones. A possible manufacturing process production FRPs is resin transfer molding (T-RTM). In this very moisture-sensitive process, ε-caprolactam in addition an activator and catalyst poly...