Effects of Damage Evolution on Edge Crack Sensitivity in Dual-Phase Steels

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Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2024-10

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Mcode

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Language

en

Pages

18

Series

Steel Research International, Volume 95, issue 10

Abstract

The present study aims to thoroughly investigate the edge-cracking phenomenon in high-strength sheets. Hence, the edge crack sensitivity of three dual-phase steels is studied in various combinations of edge manufacturing and forming processes. Finite element simulations are performed to elaborate the study. In this regard, the Yoshida–Uemori kinematic hardening model is employed to describe the plasticity behavior of the materials under multistep processes. A stress-state fracture model is coupled with this plasticity model to illustrate the distinguished local fracture strains of each material. Moreover, the effects of strain rate and the consequent temperature rise on hardening and damage are taken into account, which play significant roles during shear-cutting. The results show that although the shear-cutting processes are applied at very low speed, the strain rate and induced temperature are still high at the cutting area. The hole expansion results show different fracture behaviors for different cases. In brief, cracking is initiated at a location, which shows the highest damage accumulation during edge manufacturing plus the subsequent forming process. Such a complicated situation can only be successfully predicted by using a computer-aided approach along with proper material modeling, like the applied model in this study.

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Publisher Copyright: © 2024 The Author(s). Steel Research International published by Wiley-VCH GmbH.

Keywords

dual-phase steels, edge crack sensitivity, finite element methods, fracture models, kinematic hardening

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Citation

Habibi, N, Beier, T, Lian, J, Tekkaya, B, Koenemann, M & Muenstermann, S 2024, ' Effects of Damage Evolution on Edge Crack Sensitivity in Dual-Phase Steels ', Steel Research International, vol. 95, no. 10, 2400178 . https://doi.org/10.1002/srin.202400178