Numerical Simulation of Interface Crack Initiation and Propagation Along Interphase in Multiphase Composites Using Arbitrary Multiphase Hybrid Stress Element

Abstract

Arbitrary multiphase hybrid stress finite element (AMHSFE) is a high-order stress element based on hybrid stress finite element theory, featuring extremely simple mesh division. It demonstrates strong capabilities for multiphase materials, particularly particulate reinforced composites (PRCs) with high amounts of particulate matter [1]. Since the behavior of interfaces in multiphase materials significantly impacts their mechanical properties, research on interface cracks in multiphase materials holds considerable significance. The AMHSFE is employed in this study to simulate interface cracks of varying morphologies in multiphase materials, as well as the whole process of the interface crack initiation and propagation in PRCs with varying particle quantities and distribution patterns. A comparison of the results with those from finite element method (FEM) software analyses demonstrates the analytical reliability, accuracy and validity of AMHSFE. Furthermore, the simulations demonstrate the capability of AMHSFE in analyzing interface crack initiation and propagation in realistic PRCs with tremendous amounts of particles.