RETRACTED: Strain gradient plasticity theory to predict the input data for modeling Charpy impact energy in functionally graded steels (Retracted article. See vol. 213, 2022)

被引:9
作者
Nazari, Ali [1 ]
机构
[1] Islamic Azad Univ, Dept Mat Sci & Engn, Saveh Branch, Saveh, Iran
关键词
Functionally graded steel; Charpy impact energy; Hardness prediction; Finite element simulation; Strain gradient plasticity theory; Statistically stored dislocations; Geometrically necessary dislocations; FRACTURE-TOUGHNESS; BRITTLE TRANSITION; DYNAMIC FRACTURE; NEURAL-NETWORK; FAILURE MODES; DUCTILE; CRACK; TEMPERATURE; DISLOCATION; SIMULATION;
D O I
10.1016/j.commatsci.2011.07.007
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In the present work, Charpy impact energy of functionally graded steels composed of graded ferritic or austenitic layers which were produced by electroslag remelting in both crack divider and crack arrester configurations has been modeled by finite element method. By means of the mechanism-based strain gradient plasticity theory, the hardness of each layer in functionally graded steels was related to the density of dislocations of that layer. After that, the yield stress of each layer was estimated by supposing a linear relation between predicted hardness of each layer and its yield stress and by assuming Holloman relation for the corresponding stress-strain curve of that layer, tensile strength and tensile strain was determined. The utilized data for each layer of functionally graded steels in finite element modeling was the predicted stress-strain curve of that layer obtained from strain gradient plasticity theory. A relatively good agreement between experimental results and those obtained from simulation was observed. (C) 2011 Elsevier B.V. All rights reserved.
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页码:3442 / 3449
页数:8
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