Dynamic Mechanics Properties of SUS301L-HT Stainless Steel Used in Carbodies of Trains and Effects on Energy Absorption Characteristics of Structures

被引：0
|
作者：
Chen S. [1 ]
Cheng D. [1 ]
Xiao S. [1 ]
Zhu T. [1 ]
Yang G. [1 ]
Yang B. [1 ]
Feng Y. [1 ]
机构：
[1] State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu
[2] Locomotive and Rolling Stock College, Zhengzhou Railway Vocational & Technical College, Zhengzhou
来源：
Zhongguo Jixie Gongcheng/China Mechanical Engineering | 2019年 / 30卷 / 17期
关键词：
Dynamic mechanics property; Energy; Strain rate; SUS301L-HT stainless steel; Tabular interpolation method;
D O I：
10.3969/j.issn.1004-132X.2019.17.007
中图分类号：
学科分类号：
摘要：
The quasi-static tension tests and dynamic impact tension tests of SUS301L-HT stainless steels were carried out respectively to obtain the material constitutive relations under different strain rates. The tabular interpolation method was adopted to accurately describe the dynamic mechanics properties of SUS301L-HT stainless steels, and the reliability of this method was verified by the comparisons of finite element solutions and test data. Taking the typical thin-walled structures as the carriers, the influences of the material dynamic mechanics properties on energy absorption characteristics were investigated by using two kinds of material parameters. The research results show that the SUS301L-HT stainless steel exhibits obvious strain rate hardening effectiveness, with the increasing of strain rates, the plasticity hardening ability of the material decreases, which presents distinct temperature softening effectiveness. The dynamic mechanics properties of SUS301L-HT stainless steel may be described more accurately by the tabular interpolation method than by the dynamic constitutive models, and the results obtained by tabular interpolation method are in good agreement with the test and numerical results. The strain rates of train collisions belong to the range of low-middle strain rates. For the energy absorption structures made of the SUS301L-HT stainless steel, the practical absorbed energy of the structures considering the strain rate effectiveness is higher than that of the same structures without considering the strain rate effectiveness, but the initial peak force is relatively high. © 2019, China Mechanical Engineering Magazine Office. All right reserved.
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页码：2058 / 2065
页数：7
相关论文
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