Predictions of Nonlinear Behavior and Strength of Thick Composites with Fiber Waviness under Tensile/Compressive Load

굴곡진 보강섬유를 가진 두꺼운 복합재료의 인장/압축 비선형 거동 및 강도예측

Fiber waviness is one of manufacturing defects encountered frequently in thick composite structures. It affects significantly on the behavior as well as strength of thick composites. Thick composites with fiber waviness have two kinds of nonliearity. One is material nonlinearity, and the other is geometrical nonliearity due to fiber waviness. There are only a few studies that have considered both material and geometrical nonlinearities. In this paper, a FEA model was proposed to predict nonlinear behavior and strength of thick composites with fiber waviness.