Computational modeling study demonstrates robust simulation of ductile fracture in high-strength metals, indicating a unified framework for diverse dynamic loading scenarios.
Key Points
To develop and evaluate a reformulated bond-level Gurson-type peridynamic model for simulating ductile fracture and crack propagation in high-strength metallic materials.
Integrated the Gurson–Tvergaard–Needleman (GTN) constitutive formulation into a non-ordinary state-based peridynamics framework at the bond level.
Coupled porosity-driven softening with microscopic bond degradation and established a fracture criterion governed by the GTN void volume fraction.
Tested and validated the framework using numerical benchmark simulations under tensile, shear, compressive, and impact loading conditions.
Achieved stable two-way coupling between void-controlled plastic yield behavior and macroscopic crack initiation and propagation.
Demonstrated qualitative and robust modeling performance across varied stress states and dynamic loading regimes without numerical instability.