Research on the progressive damage model and trigger geometry of composite waved beam to improve crashworthiness

A nonlinear progressive damage model is proposed to predict the failure response of composite waved beam subjected to quasi-static axial crushing. To predict the failure model, both of the intra-laminar failure and delamination are considered. Based on continuum damage mechanics(CDM), the in-plane damage initiation is modeled with the maximum-stress failure criterion. To simulate the failed material, a stiffness degradation method combined with...