A Time-Integral Crack Propagation Model Considering Thickness Effect

被引：4

作者：

Huo, Junzhou ^{[1
]}

Zhang, Zhange ^{[1
]}

Meng, Zhichao ^{[1
]}

Xue, Lin ^{[1
]}

Jia, Guopeng ^{[1
]}

Chen, Jing ^{[2
]}

机构：

[1] Dalian Univ Technol, Sch Mech Engn, Dalian 116024, Peoples R China

[2] Dalian Ocean Univ, Sch Nav & Shipbldg Engn, Dalian 116023, Peoples R China

来源：

IEEE ACCESS | 2019年 / 7卷

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

Thick plate; crack propagation; crack closure; fatigue test; time integration method; FATIGUE LIFE PREDICTION; GROWTH-RATE; CONCEPTION; CLOSURE;

D O I：

10.1109/ACCESS.2019.2906461

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

The crack propagation mechanism of thick plates is difficult to describe accurately, and thus, it is difficult to predict the lifetimes of thick plate structural cracks in extreme construction environments. In this paper, a theoretical model of the time-integrated crack propagation that accounts for the thickness effect is established. The constraint factor is introduced to characterize the thickness effect of crack propagation, and the constraint factor formula was obtained by fitting the experimental results. The results of the fatigue crack growth tests and the crack propagation theoretical predictions for Q345D specimens showed the time-integrated crack propagation model predicts the crack propagation more accurately in the initial stage and during the stable expansion stage of crack propagation. These results have guiding significance for the fatigue life prediction of equipment with thick plate structural features.

引用

页码：41078 / 41089

页数：12

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