Application of a small-timescale fatigue, crack-growth model to the plane stress/strain transition in predicting the lifetime of a tunnel-boring-machine cutter head

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• 作者：Junzhou Huo^a ; Dong Zhu^a ; Nan Hou^a ; Wei Sun^a ; ^{sunwei@dlut.edu.cn} ; Jianghui Dong^b ; ^{jianghui.dong@mymail.unisa.edu.au}
• 关键词：TBM cutter head ; System dynamics ; Crack-tip opening angle ; Small-timescale fatigue crack-growth model
• 刊名：Engineering Failure Analysis
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：71
• 期：Complete
• 页码：11-30
• 全文大小：2536 K
• 卷排序：71

文摘

An improved quasi-static method was proposed to calculate the dynamic stress of the cutter head and verified. A plastic constraint factor α was introduced to change the yield stress value of material. A small-timescale fatigue crack growth model of plane stress/strain transition was proposed and applied in TBM cutter head. The crack growth life of TBM cutter head in the Liaoning northwest water diversion project was predicted in this paper.