Numerical modelling of P/M steel bars subjected to fatigue loading using an extended Gurson model
(2004) In European Journal of Mechanics. A, Solids 23(6). p.899-908- Abstract
- The possibility of modelling experiments conducted on P/M steel bars subjected to strain controlled fatigue loading is investigated. The constitutive relation is an extended Gurson model, using a viscoplastic formulation with plasticity driven damage accumulation supplemented by kinematic as we'll as isotropic hardening. The total damage is modelled as the sum of void growth and void nucleation. Plasticity driven heat accumulation under adiabatic conditions is furthermore included in the model. The damage accumulation was monitored after choosing a kinematically hardening material model. Also rate effects were investigated. It was shown that by assuming the reference viscoplastic strain rate to be constant, increases in damage accumulation... (More)
- The possibility of modelling experiments conducted on P/M steel bars subjected to strain controlled fatigue loading is investigated. The constitutive relation is an extended Gurson model, using a viscoplastic formulation with plasticity driven damage accumulation supplemented by kinematic as we'll as isotropic hardening. The total damage is modelled as the sum of void growth and void nucleation. Plasticity driven heat accumulation under adiabatic conditions is furthermore included in the model. The damage accumulation was monitored after choosing a kinematically hardening material model. Also rate effects were investigated. It was shown that by assuming the reference viscoplastic strain rate to be constant, increases in damage accumulation and temperature per load cycle with decreasing loading frequency is obtained. This unrealistic behaviour was shown to be eliminated by choosing the reference viscoplastic strain rate a function of the first invariant of the rate of deformation tensor. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/259277
- author
- Cedergren, Joakim LU ; Melin, Solveig LU and Lidström, Per LU
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- fatigue loading, finite elements, porous material, Gurson model, rate, dependence
- in
- European Journal of Mechanics. A, Solids
- volume
- 23
- issue
- 6
- pages
- 899 - 908
- publisher
- Elsevier
- external identifiers
-
- wos:000225642200001
- scopus:7544238353
- ISSN
- 1873-7285
- DOI
- 10.1016/j.euromechsol.2004.08.002
- language
- English
- LU publication?
- yes
- id
- b84d8763-4d86-48e8-aeea-2604d1f56503 (old id 259277)
- date added to LUP
- 2016-04-01 12:15:09
- date last changed
- 2022-01-27 01:00:57
@article{b84d8763-4d86-48e8-aeea-2604d1f56503,
abstract = {{The possibility of modelling experiments conducted on P/M steel bars subjected to strain controlled fatigue loading is investigated. The constitutive relation is an extended Gurson model, using a viscoplastic formulation with plasticity driven damage accumulation supplemented by kinematic as we'll as isotropic hardening. The total damage is modelled as the sum of void growth and void nucleation. Plasticity driven heat accumulation under adiabatic conditions is furthermore included in the model. The damage accumulation was monitored after choosing a kinematically hardening material model. Also rate effects were investigated. It was shown that by assuming the reference viscoplastic strain rate to be constant, increases in damage accumulation and temperature per load cycle with decreasing loading frequency is obtained. This unrealistic behaviour was shown to be eliminated by choosing the reference viscoplastic strain rate a function of the first invariant of the rate of deformation tensor.}},
author = {{Cedergren, Joakim and Melin, Solveig and Lidström, Per}},
issn = {{1873-7285}},
keywords = {{fatigue loading; finite elements; porous material; Gurson model; rate; dependence}},
language = {{eng}},
number = {{6}},
pages = {{899--908}},
publisher = {{Elsevier}},
series = {{European Journal of Mechanics. A, Solids}},
title = {{Numerical modelling of P/M steel bars subjected to fatigue loading using an extended Gurson model}},
url = {{http://dx.doi.org/10.1016/j.euromechsol.2004.08.002}},
doi = {{10.1016/j.euromechsol.2004.08.002}},
volume = {{23}},
year = {{2004}},
}