A methodology for online characterization of the deconsolidation of fiber-reinforced thermoplastic composite laminates

Pre-consolidated fiber-reinforced thermoplastic laminates often need a secondary manufacturing step such as welding, forming. When low pressure is applied during the laminate heating stage, porosities can appear in various forms (bubbles, delaminations, etc.). This deconsolidation phenomenon. These significantly deteriorate mechanical properties of composites. Usually, characterized by analysis after processing or Thermomechanical Analysis (TMA). However, these techniques do not allow online investigation mechanisms on representative composite laminates. In order to overcome limitations, new experimental device has been developed. It allows characterization deconsolidation, continuous measurement strain samples with large size (several centimeters contrast few millimeters TMA) under conditions. The capability setup illustrated plate made high-performance Carbon Fiber (CF) - reinforced (CF/PEKK laminates).