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...

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...

Thick composite laminates can be used in aerospace and automotive industry replacing metals for weight saving. Increasing the thickness can bring more defects, like voids. This master thesis focuses on the multi-scale voids prediction and their mechanical effect simulation of thick composite laminates manufacturing by Resin Transfer Molding (RTM). It could be potentially used in safe design of ...

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...

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...

The successful manufacture of thick-sectioned composites is challenging, since the highly exothermic nature of thermoset resins and limited temperature control make it difficult to avoid detrimental thermal and cure gradients within the composite. In order to make quality parts, it has been found experimentally that cure temperatures must be lowered as much as 50% from those suggested for thin ...

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...

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...