Work

Numerical Modeling of Stress-State Dependent Damage Evolution and Ductile Fracture of Austenitic Stainless Steel

Year: 2025

Type: article

Abstract: In this study, a stress-state-dependent elastoplastic-damage coupled constitutive model was developed and implemented into a commercial FEA program to predict the plastic behavior and fracture of 304L stainless steel. Damage evolution was experimentally quantified using unloading-reloading tensile tests, and Bonora’s damage model was applied to describe this evolution. The uncoupled damage model accurately captured the force-displacement response of smooth tensile specimens but exhibited up to an 8% discrepancy in predicting the maximum load for notched specimens. In contrast, the coupled damage model, which accounted for stress triaxiality-dependent damage evolution, reduced this discrepancy to just 1.8%. This study demonstrates that 304L stainless steel sheets show a true stress-strain relationship that depends on stress triaxiality, and disregarding this factor can lead to notable differences in fracture predictions.

Source: International Journal of Solids and Structures

DOI: 10.1016/j.ijsolstr.2025.113439

Authors: Myung-Sung Kim, You-Hee Cho, Hwasup Jang

Institutions: Korea Institute of Machinery & Materials, Korean Register (South Korea)

Language: English

Topic: Metal Forming Simulation Techniques

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,790

Funder: Ministry of Trade, Industry and Energy