期刊
JOURNAL OF NUCLEAR MATERIALS
卷 546, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jnucmat.2020.152776
关键词
Fusion; Thermal fatigue; Residual stresses; Kinematic hardening
资金
- Euratom Research And Training Programme 2014-2018 [633053]
- Euratom Research And Training Programme 2019-2020 [633053]
This study proposes an original model 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 considers plasticity achieved by thermally-activated dislocation motion and accounts for both isotropic and kinematic hardening. It is designed for application as a user-defined material law in fully implicit finite element simulation of thermomechanical loads.
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. (C) 2020 Published by Elsevier B.V.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据