틸팅차량 차체용 복합재 구조재에 대한 모우드 I 변형 하의 손상허용 평가 기법 연구

초록

Damage tolerance under Mode I deformation of the carbon fabric/epoxy composite for a tilting train carbody was evaluated through Mode I interlaminar fracture. The specimens were made of plain woven fabric with epoxy resin. An artificial delamination was fabricated by inserting 12.5㎛ or 25.0 thick Teflon film at the one end of the specimen. Delamination propagating behaviors and ㎛ interlaminar fracture surfaces were examined through an optical travelling scope and a scanning electron microscope. According to the results, abruptly unstable crack propagation such as stick-slip phenomena was observed and interlaminar fracture behaviors were affected on the location and the morphology of a delamination