Abstract
Stamp formed parts of continuous fiber reinforced thermoplastic composites (CFRTP) show local degradation in strength caused by wrinkling and fiber misalignment. In addition those causes, micro damage or residual stresses are supposed to reduce the strength of formed parts. In this study strength of hemispheres formed under various forming conditions was examined. Strength of the hemispheres varied on blank holder forces in spite that fiber alignment was all the same. In order to clarify the reason residual stresses in fibers of formed parts were evaluated by using micro-Raman spectroscopy.
