Development of an integrated micro macro model for anticipating matrix cracking evolution and fiber breakage in the laminated composite containing an open hole

Abstract

The present study investigates the progressive damage formation in open-hole laminated composites subjected to axial tensile and compressive loading using a proposed constitutive model. To this aim, using the classical elasticity formulation, the stress distribution of a two-dimensional representative volume element (RVE) subjected to general remote loads, which is extracted from an arbitrary lamina in composite laminate, will be evaluated. Then, based on micromechanical damage criteria, the failure of the RVE (matrix or fiber) will be examined. Afterward, the concept of instant local failure in the RVE based on the mentioned failure criteria and further lamina stiffness degradation in macro level are implemented in ANSYS FE code. Finally, the progressive damage analysis of different open-hole laminated composites will be assessed and verified with the accessible numerical and experimental methods. The obtained results demonstrate an acceptable agreement with the available experimental outcomes. According to this, the proposed approach can be used as a reliable tool to analyze the formation of matrix cracking and fiber rupture in different composite laminates with the least computational costs.