Nonlinear Elastic Analysis of Thick Composites with Fiber Waviness Using a FEA Model

FEA 모델을 이용한 굴곡진 보강섬유를 가진 두꺼운 복합재료의 비선셩 거동에 관한 연구

A FEA model is proposed to study the effects of fiber waviness on tensile/comprssive nonlinear behaviors of thick unidirectional composites. In the analyses both material and geometical nonlinarities are considered. The predicted results from the FEA model are compared with those obtained from the previous analytical model (thin carpet model) Tensile/compressive tests are also conducted on the specimens with various controlled fiber waviness to obtain the nonlinear behaviors of composites experimentally. The predictions from the FEA model show better agreements with the experiments than those from the analytical model.