Quasi-Static Indentation test Analyses of CFRP laminate using quasi three-dimensional XFEM

Abstract

CFRP laminates subjected to out-of-plane load may have complex damage such as delamination, matrix crack and fiber failure. In this study, damage propagation analyses for Quasi-Static Indentation (QSI) tests were performed by static implicit method using quasi-3D extended finite element method (XFEM) considering materially, geometrically and boundary nonlinear. In the numerical models, interface elements considering cohesive zone model (CZM) are introduced to model delamination. The accuracy of QSI test analysis was improved by quasi-3D XFEM using multiple matrix crack model, and ZECZM considering the dependence of shear strength on hydrostatic pressure. It was shown that the results including relation between load point displacement and applied load, and delamination obtained by the analyses are in good agreement with the experimental results.