Fatigue crack growth of G20Mn5QT cast steel based on a two-parameter driving force model

被引：13
作者：
Xu, Yantao [1 ]
Li, Zilin [1 ,3 ]
Xu, Jie [1 ,2 ]
Han, Qinghua [1 ,2 ]
机构：
[1] Tianjin Univ, Sch Civil Engn, Tianjin 300072, Peoples R China
[2] Tianjin Univ, China Minist Educ, Key Lab Coast Civil Struct Safety, Tianjin 300072, Peoples R China
[3] Hebei Univ Water Resources & Elect Engn, Dept Civil Engn, Cangzhou 061001, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2019年 / 208卷
基金：
中国国家自然科学基金;
关键词：
Fatigue crack growth; Two-parameter driving force; Fatigue damage accumulation; SWT parameter; G20Mn5QT cast steel; DAMAGE ACCUMULATION; PROPAGATION; BEHAVIOR; CLOSURE; SIMULATIONS; PREDICTION; FRACTURE; DUCTILE; WELD;
D O I：
10.1016/j.engfracmech.2018.12.028
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
This paper performs a research on fatigue crack growth in G20Mn5QT cast steel using the experimental method and a semi-empirical fatigue crack growth model. The model combines the two-parameter driving force and fatigue damage accumulation. It would take into account the effects of mean stress and load history, and the fatigue crack growth rate curve would only be influenced by the sort of material. Comparing to the experimental results, the proposed model has good simulation results. A unified fatigue crack growth rate equation for G20Mn5QT cast steel has been given out, which is more convenient for engineering applications.
引用
收藏
页码：13 / 26
页数：14
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