Logo: University of Southern California

Project Title:
In-situ Monitoring of Void Evolution in Out-of-Autoclave Prepregs


Wei Hu


In the layup of prepreg laminates, air is inevitably entrapped between adjacent prepreg plies. However, the removal of this inter-ply air under vacuum bag-only (VBO) cure condition is not well understood. An in-situ visualization technique was developed to dynamically obersve inter-ply void evolution duirng VBO cure. Simulating the conditions of inter-ply air removal during cure is accomplished by incorporating a perforated resin film inter the lay-up. The goals of this present study are(1) to increase the understanding of inter-ply gas induced void formation and removal mechanisms; (2) to develop science-based void reduction strategies for VBO prepregs