Convergence Analysis of Stress Intensity Factor at Crack Tips for TBM Cutterheads

被引：0
|
作者：
Ling J. [1 ]
Sun W. [2 ]
Yang X. [1 ]
Tong X. [1 ]
机构：
[1] School of Mechanical and Automotive Engineering, Fujian University of Technology, Fuzhou
[2] School of Mechanical Engineering, Dalian University of Technology, Dalian, 116024, Liaoning
来源：
| 2017年 / Chinese Mechanical Engineering Society卷 / 28期
关键词：
Crack; Finite element method(FEM); Stress intensity factor; Sub-model technique; Tunnel boring machine(TBM) cutterhead;
D O I：
10.3969/j.issn.1004-132X.2017.10.002
中图分类号：
学科分类号：
摘要：
Aiming at the engineering problems such as crack damage and life prediction of TBM cutterheads, a solution method of stress intensity factors was proposed based on the sub-model technique, and it was validated by a rectangular steel plate with a crack. Then the convergence effects of crack mesh parameters on stress intensity factors at the crack tips of cutterheads were analyzed. The analysis results show that the maximum relative errors of numerical and theoretical results are as 3.6%. Besides, the crack element mesh parameters were obtained that ensured both of the accuracy and efficiency for cutterhead stress intensity factors solutions, which may provide a reference for the crack growth life prediction of structures. © 2017, China Mechanical Engineering Magazine Office. All right reserved.
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页码：1143 / 1148
页数：5
相关论文
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