J031024 Strength estimation of formed continuous fiber reinforced thermoplastic composites by accounting for variation in fiber shear angle caused during forming process

Abstract

Strength was examined by internal pressure fracture tests for press-formed hemispheres from woven continuous Carbon Fiber/PPS (Poly Phenylene Sulfide) composite sheet under various forming conditions, in order to study how forming process affects the strength of press formed parts. Miss-orientation of fibers to loading direction due to variation in fiber shear angle caused during the stamp forming to semi-spherical shape is supposed to affect most significantly on strength. Concerning press forming conditions, it was clarified that the fracture pressure varied with blank hold force in spite that formed shape and resulting fiber shear angle was the same, and on the other hand it was not affected by die temperature.