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Modelling Thermo‐Viscoplasticity of Case‐Hardening Steels Over Wide Temperature Ranges

Oppermann, Philip LU orcid ; Denzer, Ralf LU and Menzel, Andreas LU (2018) GAMM Annual Meeting, 2018 18. p.201800199-201800199
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... (More)
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). (Less)
Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Thermoplasticity, Finite element (FE) numerical modeling, Thermodynamics, Thermomechanics, Thermo-mechanical processes
host publication
Procedings in Applied Mathematics and Mechanics
volume
18
pages
2 pages
publisher
Wiley-VCH Verlag
conference name
GAMM Annual Meeting, 2018
conference location
Munich, Germany
conference dates
2018-03-19 - 2018-03-23
DOI
10.1002/pamm.201800199
language
English
LU publication?
yes
id
24cbbe26-00f8-46ad-a57a-f787d17df22f
date added to LUP
2019-10-24 13:29:09
date last changed
2022-02-14 12:22:09
@inproceedings{24cbbe26-00f8-46ad-a57a-f787d17df22f,
  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).}},
  author       = {{Oppermann, Philip and Denzer, Ralf and Menzel, Andreas}},
  booktitle    = {{Procedings in Applied Mathematics and Mechanics}},
  keywords     = {{Thermoplasticity; Finite element (FE) numerical modeling; Thermodynamics; Thermomechanics; Thermo-mechanical processes}},
  language     = {{eng}},
  month        = {{12}},
  pages        = {{201800199--201800199}},
  publisher    = {{Wiley-VCH Verlag}},
  title        = {{Modelling Thermo‐Viscoplasticity of Case‐Hardening Steels Over Wide Temperature Ranges}},
  url          = {{http://dx.doi.org/10.1002/pamm.201800199}},
  doi          = {{10.1002/pamm.201800199}},
  volume       = {{18}},
  year         = {{2018}},
}