Plastic deformation of ITER specification tungsten Temperature and strain rate dependent constitutive law deduced by inverse finite element analysis

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Plastic deformation of ITER specification tungsten Temperature and strain rate dependent constitutive law deduced by inverse finite element analysis. / Zinovev, Aleksandr; Delannay, Laurent; Terentyev, Dmitry.

In: International Journal of Refractory Metals & Hard Materials, Vol. 96, 105481, 10.01.2021, p. 1-10.

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@article{f4836e7c0e1a4a3bbc1bf6f6ca3aa71d,
title = "Plastic deformation of ITER specification tungsten Temperature and strain rate dependent constitutive law deduced by inverse finite element analysis",
abstract = "In this work, we have derived a constitutive law describing the elasto-plastic response of tungsten by applying an inverse finite element analysis (IFEA) to grasp the deformation well beyond the onset of deformation instability in tensile tests. A model based on the Kocks-Mecking representation of thermally-activated dislocation-mediated plasticity was applied to characterise the mechanical response of tungsten compliant with the ITER specification. The developed model accurately describes the temperature and strain rate dependent tensile properties in the temperature range 250–600 ◦C. The capability to extrapolate the hardening law to a higher temperature and strain rate range is demonstrated. A particular advantage of the developed method is its applicability to neutron irradiated materials, for which the uniform elongation is often very low or even negligible.",
keywords = "Tungsten, Constitutive law, Inverse finite element analysis, Fusion, ITER, Plasma-facing material",
author = "Aleksandr Zinovev and Laurent Delannay and Dmitry Terentyev",
note = "Score=10",
year = "2021",
month = "1",
day = "10",
doi = "10.1016/j.ijrmhm.2021.105481",
language = "English",
volume = "96",
pages = "1--10",
journal = "International Journal of Refractory Metals & Hard Materials",
issn = "0263-4368",
publisher = "Elsevier",

}

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TY - JOUR

T1 - Plastic deformation of ITER specification tungsten Temperature and strain rate dependent constitutive law deduced by inverse finite element analysis

AU - Zinovev, Aleksandr

AU - Delannay, Laurent

AU - Terentyev, Dmitry

N1 - Score=10

PY - 2021/1/10

Y1 - 2021/1/10

N2 - In this work, we have derived a constitutive law describing the elasto-plastic response of tungsten by applying an inverse finite element analysis (IFEA) to grasp the deformation well beyond the onset of deformation instability in tensile tests. A model based on the Kocks-Mecking representation of thermally-activated dislocation-mediated plasticity was applied to characterise the mechanical response of tungsten compliant with the ITER specification. The developed model accurately describes the temperature and strain rate dependent tensile properties in the temperature range 250–600 ◦C. The capability to extrapolate the hardening law to a higher temperature and strain rate range is demonstrated. A particular advantage of the developed method is its applicability to neutron irradiated materials, for which the uniform elongation is often very low or even negligible.

AB - In this work, we have derived a constitutive law describing the elasto-plastic response of tungsten by applying an inverse finite element analysis (IFEA) to grasp the deformation well beyond the onset of deformation instability in tensile tests. A model based on the Kocks-Mecking representation of thermally-activated dislocation-mediated plasticity was applied to characterise the mechanical response of tungsten compliant with the ITER specification. The developed model accurately describes the temperature and strain rate dependent tensile properties in the temperature range 250–600 ◦C. The capability to extrapolate the hardening law to a higher temperature and strain rate range is demonstrated. A particular advantage of the developed method is its applicability to neutron irradiated materials, for which the uniform elongation is often very low or even negligible.

KW - Tungsten

KW - Constitutive law

KW - Inverse finite element analysis

KW - Fusion

KW - ITER

KW - Plasma-facing material

UR - https://ecm.sckcen.be/OTCS/llisapi.dll/open/42278464

U2 - 10.1016/j.ijrmhm.2021.105481

DO - 10.1016/j.ijrmhm.2021.105481

M3 - Article

VL - 96

SP - 1

EP - 10

JO - International Journal of Refractory Metals & Hard Materials

JF - International Journal of Refractory Metals & Hard Materials

SN - 0263-4368

M1 - 105481

ER -

ID: 7040784