Aspects of ductile failure prediction of interstitial‐free steel based on a Gurson‐type damage model

Abstract

Numerical simulation of manufacturing processes has been gaining widespread attention owing to importance in the development of new products and components. In a parallel path, there has been a substantial development of steels with improved mechanical characteristics, such as the interstitial‐free (IF) steel. The present work is inserted within this context and introduces application of a micromechanical modelling approach to an interstitial‐free steel based on a Gurson‐type constitutive model with the objective of assessing the evolution of mechanical degradation and failure prediction in fracture‐free materials. The inelastic material parameters were obtained from tensile tests of cylindrical specimens. Evolution of the mechanical degradation, represented by a micromechanical damage measure, is discussed based on three‐point bend tests.

Constitutive Model and Fracture Criterion of Q345 Steel Welded Joints

“…al. [13], Liao et al [14], Xin et al [15], Li Z et al [16], and Bressan et al [17] have also researched various materials. It can be seen that many scholars have proposed failure models on the relationship between triaxial stress or strain rate and fracture strain.…”