Modeling strain hardening during cyclic thermal shock tests of tungsten

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Modeling strain hardening during cyclic thermal shock tests of tungsten. / Zinovev, Aleksandr; Delannay, L.; Terentyev, Dmitry.

In: Journal of Nuclear Materials, Vol. 546, 152776, 01.04.2021, p. 1-9.

Research output: Contribution to journalArticle

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Zinovev, Aleksandr ; Delannay, L. ; Terentyev, Dmitry. / Modeling strain hardening during cyclic thermal shock tests of tungsten. In: Journal of Nuclear Materials. 2021 ; Vol. 546. pp. 1-9.

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@article{5e2d89d7a73a4492b74ae05c71d65173,
title = "Modeling strain hardening during cyclic thermal shock tests of tungsten",
abstract = "An original model is proposed in order to simulate elastic-plastic transients inside tungsten subjected to cyclic thermal loads expected due to plasma instabilities called “edge-localized modes” in ITER. The model assumes that plasticity is achieved by thermally-activated dislocation motion and it accounts for both isotropic and kinematic hardening. Their relative contributions to the material response are tuned in order to reproduce uniaxial tensile tests performed at different temperatures and different strain rates in various tungsten grades. The model is designed for application as a user-defined material law in fully implicit finite element simulation of thermomechanical loads. The first predictions of the build-up of residual stresses are observed to be qualitatively in line with experimental trends.",
keywords = "Fusion, Thermal fatigue, Kinematic hardening, Residual stresses",
author = "Aleksandr Zinovev and L. Delannay and Dmitry Terentyev",
note = "Score=10",
year = "2021",
month = "4",
day = "1",
doi = "10.1016/j.jnucmat.2020.152776",
language = "English",
volume = "546",
pages = "1--9",
journal = "Journal of Nuclear Materials",
issn = "0022-3115",
publisher = "Elsevier",

}

RIS - Download

TY - JOUR

T1 - Modeling strain hardening during cyclic thermal shock tests of tungsten

AU - Zinovev, Aleksandr

AU - Delannay, L.

AU - Terentyev, Dmitry

N1 - Score=10

PY - 2021/4/1

Y1 - 2021/4/1

N2 - An original model is proposed in order to simulate elastic-plastic transients inside tungsten subjected to cyclic thermal loads expected due to plasma instabilities called “edge-localized modes” in ITER. The model assumes that plasticity is achieved by thermally-activated dislocation motion and it accounts for both isotropic and kinematic hardening. Their relative contributions to the material response are tuned in order to reproduce uniaxial tensile tests performed at different temperatures and different strain rates in various tungsten grades. The model is designed for application as a user-defined material law in fully implicit finite element simulation of thermomechanical loads. The first predictions of the build-up of residual stresses are observed to be qualitatively in line with experimental trends.

AB - An original model is proposed in order to simulate elastic-plastic transients inside tungsten subjected to cyclic thermal loads expected due to plasma instabilities called “edge-localized modes” in ITER. The model assumes that plasticity is achieved by thermally-activated dislocation motion and it accounts for both isotropic and kinematic hardening. Their relative contributions to the material response are tuned in order to reproduce uniaxial tensile tests performed at different temperatures and different strain rates in various tungsten grades. The model is designed for application as a user-defined material law in fully implicit finite element simulation of thermomechanical loads. The first predictions of the build-up of residual stresses are observed to be qualitatively in line with experimental trends.

KW - Fusion

KW - Thermal fatigue

KW - Kinematic hardening

KW - Residual stresses

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/42278478

U2 - 10.1016/j.jnucmat.2020.152776

DO - 10.1016/j.jnucmat.2020.152776

M3 - Article

VL - 546

SP - 1

EP - 9

JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

SN - 0022-3115

M1 - 152776

ER -

ID: 7040796