High Performance Composite
Design and Manufacturing
Canada Research Chair - Tier 1

Study of voids formation in RTM manufacturing

Professor : Edu Ruiz
Project coordinator : François LeBel, Ph.D. student
Participant : Pier-Alexandre Pelletier, undergraduate student



Over years, the composite manufacturing industry has progressed to meet with aeronautical and automotive segment needs. The principal causes of these developments are linked to the fact that composite parts show excellent properties such as specific strength and rigidity, electrical and acoustic insulation and corrosion resistance. Traditional manufacturing processes such as autoclave and hand lay-up present some technical and economical drawbacks in comparison with the closed mould techniques such as Resin Transfer Moulding and Vacuum Assisted Resin Infusion. The needs for high performance parts, productivity increase and decrease of worker exposure to styrene have promoted companies to develop these techniques. However, they need some improvements to control the parameters that influence the parts’ quality.
Some parameters that influence the quality are:
-Complete reinforcement impregnation by resin
-Homogeneous mixing of species in resin
-Injection gate and vent localisations
-Minimal void content in parts

In this project, reinforcement impregnation and void formation will be the principal axis of research since mechanical properties are directly related to these parameters. We must control them to produce high performance composite parts.

Void formation and reinforcement impregnation study during the Resin Transfer Moulding process with a constant volumetric flow rate injection in a mould of constant area.