A Peridynamic Model for Ductile Fracture of Moderately Thick Plates

Abstract

This paper presents an effective modeling technique for propagation of mode I cracks in ductile materials using Peridynamics Implemented Finite Element Analysis (PDIFEA) in ABAQUS. Peridynamics is a nonlocal theory which removes the restrictions of fracture modeling in classical continuum mechanics. PDIFEA models of different Compact Tension (CT) specimens are generated using truss elements. The yield stretch of a bond is analytically determined by equating total force across fracture surface in yield state and experimentally measured yield strength of the material. The critical stretch of the bond is related to critical strain energy release rate. A new constitutive model is proposed for the bond failure which depends on yield stretch and critical stretch value. Load versus crack mouth opening displacement results are calculated and validated with the published results in the open literature. Based on the results obtained in this study, it can be indicated that PDIFEA with proposed constitutive model for two-dimensional is capable of capturing ductile damage in CT specimens. Copyright (C) 2016 The Authors. Published by Elsevier B.V.