A new peridynamic mixed-mode bond failure model for interface delamination and homogeneous materials fracture analysis

Abstract

A new peridynamic bond failure model is proposed for mixed-mode crack fracture analysis in material interface and homogeneous isotropic materials, which utilize bond failure criteria presented for mixed-mode peridynamic bonds using the angle-dependent formations of critical stretch (CS) or critical energy density (CED). Then, three tests of asymmetric double cantilevered beams (ADCB), single edge-notched plate (SENP) and three-point bend (TPB) tests are investigated for model verification and application, and the numerical predicted fracture characteristics (e.g., crack path, load–displacement curve and critical load) from the proposed model are compared to those obtained from the finite element method (FEM) result, theoretical solution and experimental data. The close comparisons demonstrate that the proposed peridynamic bond failure model can successfully capture mixed-mode fracture behaviors of interface and homogeneous materials fracture.