PHASE-FIELD DAMAGE MODELLING OF HIGH-STRENGTH STEEL FAILURE: NUMERICAL AND EXPERIMENTAL VALIDATION

Abstract

Phase-field damage modelling (PFDM) has emerged as an effective framework for simulating a material degradation and failure processes due to its ability to predict the evolu-tion of damage. In this study, a 2D axisymmetric PFDM formulation is verified in PAK-DAM FEM software through comparison with 3D solid model for benchmark example from the literature. After that, 2D axisymmetric FE model is used for a comparison with experimental tensile tests of high-strength S1100QL steel. The finite element model is developed using 2D axisymmetric elements, incorporating large-strain von Mises plasticity with a logarithmic strain constitutive model. The FE mesh consists of 970 elements and 1078 nodes, with boundary and loading conditions de-fined to replicate the experimental setup. A comparison of stress-strain response obtained from numerical simulations and experimental measurements shows good agreement, con-firming the capability of the proposed PFDM approach to accurately reproduce the tensile behaviour of metallic mate-rials such as S1100QL steel.