|Table of Contents|

[1] Wei Zezhong, Jin Chuanling, Jin Hui, et al. Fatigue life evaluation of girth butt weld within welded caststeel joints based on the extrapolation notch stress method [J]. Journal of Southeast University (English Edition), 2021, 37 (1): 59-66. [doi:10.3969/j.issn.1003-7985.2021.01.008]
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Fatigue life evaluation of girth butt weld within welded caststeel joints based on the extrapolation notch stress method()
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
37
Issue:
2021 1
Page:
59-66
Research Field:
Materials Sciences and Engineering
Publishing date:
2021-03-20

Info

Title:
Fatigue life evaluation of girth butt weld within welded caststeel joints based on the extrapolation notch stress method
Author(s):
Wei Zezhong1;  2;  Jin Chuanling3;  1;  Jin Hui1;  2
1Jiangsu Key Laboratory of Engineering Mechanics, Southeast University, Nanjing 211189, China
2School of Civil Engineering, Southeast University, Nanjing 211189, China
3Jiangsu Frontier Electric Technology Co., Ltd., Nanjing 211102, China
Keywords:
welded cast steel joint;  girth butt weld;  extrapolation notch stress method;  effective notch stress method;  fatigue life evaluation
PACS:
TU512.9
DOI:
10.3969/j.issn.1003-7985.2021.01.008
Abstract:
The fatigue life evaluation of the girth butt weld within the welded cast steel joint was studied based on the extrapolation notch stress method. Firstly, the mesh sensitivity of the finite element model of the welded cast steel joint was analyzed to determine the optimal mesh size. Based on the stress field analysis of the finite element model of the welded cast steel joint at the weld toe and weld root, the sharp model of the extrapolation notch stress method was applied to derive the effective notch stress of the rounded model belonging to the effective notch stress method, in which the key problem is to calculate the extrapolation point C, and the extrapolation point C has an exponential function relationship with the geometric parameters of the welded cast steel joint. By setting different values of geometric parameters, the corresponding value of parameter C is calculated, and then the functional relationship between the extrapolation point C and the geometric parameters can be obtained by the multiple linear regression analysis. Meanwhile, the fatigue life evaluation of the girth butt weld within welded cast steel joints based on the effective notch stress was performed according to the guideline recommended by the IIW(International Institute of Welding). The results indicate that the extrapolation notch stress method can effectively simplify the process of calculating the effective notch stress and accurately evaluate the fatigue life of the girth butt weld within welded cast steel joints.

References:

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Memo

Memo:
Biographies: Wei Zezhong(1990—), male, Ph.D. candidate; Jin Hui(corresponding author), female, doctor, professor, jinhui@seu.edu.cn.
Foundation items: The National Key Research and Development Program of China(No. 2017YFC0805100), the National Natural Science Foundation of China(No. 51578137), the Priority Academic Program Development of Jiangsu Higher Education Institutions, the Open Research Fund Program of Jiangsu Key Laboratory of Engineering Mechanics.
Citation: Wei Zezhong, Jin Chuanling, Jin Hui. Fatigue life evaluation of girth butt weld within welded cast steel joints based on the extrapolation notch stress method[J].Journal of Southeast University(English Edition), 2021, 37(1):59-66.DOI:10.3969/j.issn.1003-7985.2021.01.008.
Last Update: 2021-03-20