Finite-strain thermo-viscoplasticity for case-hardening steels over a wide temperature range

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Abstract

The aim of this work is the development of a thermodynamically consistent fully coupled finite-strain thermo-viscoplastic material model for metals. The model is based on a split of the free energy into a thermo-elastic, a thermo-plastic and a purely thermal part and covers nonlinear cold-work hardening and thermal softening. Nonlinear temperature dependent effects are accounted for the elastic moduli, the plastic hardening moduli, the thermal expansion, the heat capacity and the heat conductivity. Furthermore, strain rate-dependency of the current yield stress is realized using a temperature dependent nonlinear Perzyna-type viscoplastic model based on an associative flow rule. The model and its parameters are fitted against experimental data for case hardening steel 16MnCr5 (1.7131).

Details

Authors
Organisations
External organisations
  • Institute of Mechanics,Technical University of Dortmund
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Applied Mechanics
  • Metallurgy and Metallic Materials

Keywords

  • Thermoplasticity, Material Model, Thermomechanics
Original languageEnglish
Title of host publicationProceedings in Applied Mathematics & Mechanics
PublisherWiley-VCH Verlag
Pagese201900237
Number of pages2
Volume19
Publication statusPublished - 2019 Nov 18
Publication categoryResearch
Peer-reviewedYes
EventGAMM Annual Meeting, 2019 - TU Wien, Vienna, Austria
Duration: 2019 Feb 182019 Feb 22
Conference number: 90
https://jahrestagung.gamm-ev.de/index.php/2019/2019-annual-meeting

Conference

ConferenceGAMM Annual Meeting, 2019
CountryAustria
CityVienna
Period2019/02/182019/02/22
Internet address

Related research output

Philip Oppermann, Ralf Denzer & Andreas Menzel, 2019 Feb 21, p. 277-278. 2 p.

Research output: Contribution to conferenceAbstract

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