Mode-I stress intensity factor by peridynamic stresses

Abstract

While nodal displacements and/or strain energy have been used to analyze the fracture parameters in previous peridynamic studies, a simple method is here proposed to compute stress intensity factors from the nodal tensile stresses revealed by peridynamics with the virial theorem. The method is demonstrated for the mode I fracture of single edge- and center-cracked plates with a wide range of initial crack length-plate width ratios from 0.1 through 0.5. Crack opening displacement is also studied. δ-convergence is considered. Results are discussed with analytical and finite element methods.