PROGRESSIVE DAMAGE ANALYSIS OF PLAIN WOVEN COMPOSITES UNDER TENSILE LOADING

In this study, develop accurate finite element models of plain woven fabrics to determine their mechanical properties and progressive damage analysis. In addition, in order to describe the internal geometry from actual measurements of tow geometry made on photomicrographs of sectioned laminates. In the first step, a unit-cell of composite was created in CATIA software in meso scale. After that, unit-cell was imported in ABAQUS software to finite element (FE) analysis. For each architecture, the yarns are assumed to be transversely isotropic and the resin assumed isotropic. After that a stress averaging technique based on an iso-strain assumption is used to determine the effective moduli of the unit cells. Afterwards, The damage model is implemented in the FE code by a user-defined (USDFLD). In this damage model, in order to predict damage initiation of composite plates, 3D Hashin’s failure criterion is chosen. And in order to evolution damage instantaneous Material Property Degradation Method is applied. The good agreement between the theoretical results and experimental data, introduces the ability of the applied model and provided subroutine.