L型炭素繊維強化熱可塑性プラスチックのプレス成形によるしわを考慮した力学特性評価

抄録

A carbon fiber reinforced thermoplastic (CFRTP) sheet was made by a plain-woven carbon fiber fabric and thermoplastic polyimide. Two types of the L-shaped CFRTP specimen were fabricated by hot-pressing of laminated sheet or hot-pressing of pre-consolidated laminated sheet. Wrinkle of fiber was not observed in the L-shaped CFRTP specimen by laminated sheet but observed in the specimen by pre-consolidated laminated sheet. Four-point bending tests on the L-shaped CFRTP specimens were performed and the interlaminar tensile strengths were calculated. The L-shaped CFRTP specimen by laminated sheet showed higher interlaminar tensile strength than the specimen by pre-consolidated laminated sheet. Small delamination parallel to the wrinkle was developed at the relatively low stress condition for the L-shaped CFRTP by pre-consolidated laminated sheet which degraded the interlaminar tensile strength.