On computational modeling of postbuckling behavior of composite laminates containing single and multiple through-the-width delaminations using interface elements with cohesive law

This paper presents an extensive analysis on effect of various parameters on the postbuckling behavior of laminated composites. The analysis is performed by developing an interface element with de-cohesive constitutive law. The debonding of adjacent plies has been simulated to illustrate the effects of delaminations growth on the post buckling behavior of the laminated composites. A parametric study is carried out to investigate the effect of size, location, distribution of delaminations, and layups configuration on the postbuckling response of composite panels concurrent with propagation of delamination. The obtained numerical results are validated against existing numerical and experimental results.