Energy-based numerical modeling of the strain rate effect on fracture toughness of SA508 Gr. 1a

Abstract

This article presents an energy-based method to simulate ductile tearing under dynamic loading conditions. The strain rate-dependent material properties are characterized by the Johnson-Cook-type model. The damage model is defined based on the multi-axial fracture strain energy concept. The proposed damage model is applied to simulate the fracture toughness test of SA508 Gr. 1a under four different test speeds. Simulated results show a good overall agreement with the experimental results.