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

Oppermann, Philip LU orcid ; Denzer, Ralf LU and Menzel, Andreas LU (2019) GAMM Annual Meeting, 2019 19. p.201900237-201900237
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... (More)
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). (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, Material Model, Thermomechanics
host publication
Proceedings in Applied Mathematics & Mechanics
volume
19
article number
e201900237
pages
2 pages
publisher
Wiley-VCH Verlag
conference name
GAMM Annual Meeting, 2019
conference location
Vienna, Austria
conference dates
2019-02-18 - 2019-02-22
DOI
10.1002/pamm.201900237
language
English
LU publication?
yes
id
04e223a9-89b7-49bc-b09b-3b66c7b6806a
date added to LUP
2019-11-19 09:06:04
date last changed
2022-02-14 12:22:09
@inproceedings{04e223a9-89b7-49bc-b09b-3b66c7b6806a,
  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).}},
  author       = {{Oppermann, Philip and Denzer, Ralf and Menzel, Andreas}},
  booktitle    = {{Proceedings in Applied Mathematics & Mechanics}},
  keywords     = {{Thermoplasticity; Material Model; Thermomechanics}},
  language     = {{eng}},
  month        = {{11}},
  pages        = {{201900237--201900237}},
  publisher    = {{Wiley-VCH Verlag}},
  title        = {{Finite-strain thermo-viscoplasticity for case-hardening steels over a wide temperature range}},
  url          = {{http://dx.doi.org/10.1002/pamm.201900237}},
  doi          = {{10.1002/pamm.201900237}},
  volume       = {{19}},
  year         = {{2019}},
}