Experimental investigation and constitutive material modelling of low cycle fatigue of EUROFER97 for fusion applications

被引:0
|
作者
Zahran, Hussein [1 ,2 ,3 ]
Zinovev, Aleksandr [1 ]
Terentyev, Dmitry [1 ]
Wang, Xiaowei [4 ]
Wahab, Magd Abdel [2 ,5 ]
机构
[1] SCK CEN, Inst Nucl Mat Sci, Struct Mat Grp, B-2400 Mol, Belgium
[2] Univ Ghent, Fac Engn & Architecture, Dept Elect Energy Met Mech Constructions & Syst, Soete Lab, B-9000 Ghent, Belgium
[3] Ain Shams Univ, Fac Engn, Dept Design & Prod Engn, Cairo 11517, Egypt
[4] Nanjing Tech Univ, Sch Mech & Power Engn, Nanjing 211816, Peoples R China
[5] Yuan Ze Univ, Coll Engn, Taoyuan, Taiwan
关键词
Asymmetric cyclic loading; Fusion materials; Chaboche viscoplasticity model; Strain memory effect; FERRITIC-MARTENSITIC STEELS; MEAN STRESS; MICROSTRUCTURAL BEHAVIOR; CREEP; PLASTICITY; DEFORMATION; RULES; PART; P91;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
EUROFER97 is one of the candidate materials for structural components of fusion nuclear reactors (i.e. ITER and DEMO). Due to the plasma instabilities and cyclic operating conditions, these structural components are expected to face asymmetric thermomechanical fatigue loading. In this work, existing models based on the Chaboche viscoplasticity model have been modified in order to represent the fatigue behaviour of EUROFER97 under different strain ratios and ranges. The modified model has been parameterized based on experimental data obtained from fatigue tests of EUROFER97, in which the strain range varied from 0.6 % to 1.5 % and the strain ratio was either-1 or 0 at room temperature or 350 degrees C. The incorporation of the strain memory effect into the isotropic hardening due to the observed non-Masing behaviour of EUROFER97 enabled the use of unified parameters for every temperature that could cover all the different testing conditions. In order to validate the current model, the simulated results are compared to strain controlled low cycle fatigue test data performed at room temperature and 350 degrees C, which were not used for the parameterization. A good match between the simulation and experimental results proves the predictive capability of the proposed modified model.
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页数:16
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