On the Modelling of Thermo-Viscoplasticity of 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 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

  • Metallurgy and Metallic Materials
  • Applied Mechanics

Keywords

  • Thermoplasticity, Viscoplasticity, Thermomechanical, finite element implementation of coupled problems
Original languageEnglish
Title of host publicationProceedings in Applied Mathematics and Mechanics
EditorsCarsten Könke, Carsten Trunk
Place of PublicationWeinheim
PublisherWiley-VCH
Pages447-448
Number of pages2
StatePublished - 2018 Mar 15
Publication categoryResearch
Peer-reviewedYes

Publication series

NameProceedings in Applied Mathematics and Mechanics
Number1
Volume17
ISSN (Electronic)1617-7061

Related research output

View all (1)