MATEC Web of Conferences (2016-01-01)

Ductile failure analysis of high strength steel in hot forming based on micromechanical damage model

  • Ying Liang,
  • Liu Wenquan,
  • Wang Dantong,
  • Hu Ping

DOI
https://doi.org/10.1051/matecconf/20168003002
Journal volume & issue
Vol. 80
p. 03002

Abstract

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The damage evolution of high strength steel at elevated temperature is investigated by using the Gurson-Tvergaard-Needleman (GTN) model. A hybrid method integrated thermal tensile test and numerical technique is employed to identify the damage parameters. The analysis results show that the damage parameters are different at different temperature as the variation of tested material microstructure. Furthermore, the calibrated damage parameters are implemented to simulate a bugling forming at elevated temperature. The experimental results show the availability of GTN damage model in analyzing sheet formability in hot forming.