A threshold formula for fatigue crack growth with mean stress intensity factors

被引：16

作者：

Cai, Xiaojing ^{[1
]}

Xia, Ri ^{[1
]}

Huo, Mingchen ^{[1
]}

Xu, Jinquan ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, State Key Lab Ocean Engn, Shanghai 200240, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES | 2018年 / 135卷

基金：

中国国家自然科学基金;

关键词：

Threshold; Mean stress intensity factor; Fatigue limit; Mean stress; Crack front; HIGH-CYCLE FATIGUE; DISLOCATION PILE-UP; RATIO; INITIATION; MODEL; LIFE; PROPAGATION; SIMULATION; CRITERION; STRENGTH;

D O I：

10.1016/j.ijmecsci.2017.12.014

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

From the fatigue limit condition of crack front, a threshold formula has been derived with respect to mean stress intensity factors. Examinations with experimental results show that this formula can express threshold quantitatively and uniformly. It is found that threshold varies with mean stress intensity factor just as that fatigue limit varies with mean stress if the mean stress intensity factor is smaller than a critical value, while if the mean stress intensity factor is larger than the critical value, plastic deformation at crack front would affect threshold greatly. It has also been investigated that why there would be such a critical mean stress intensity factor behavior. The reason lies on that whether damage induced by plastic deformation at crack front could be neglected or not. A formula to estimate the critical mean stress intensity factor has also been derived. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：639 / 645

页数：7

共 39 条

[1] A parameter for quantitative analysis of plasticity induced crack closure [J].

Antunes, F. V. ;

Correia, L. ;

Ramalho, A. L. .

INTERNATIONAL JOURNAL OF FATIGUE, 2015, 71 :87-97

[2]

Bignonnet A., 1984, Advances in Fracture Research (Fracture 84). Proceedings of the 6th International Conference on Fracture (ICG6), P1861

[3] A detailed study of the relationship between fatigue crack growth rate and striation spacing in a range of low alloy ferritic steels [J].

Bulloch, J. H. ;

Callagy, A. G. .

ENGINEERING FAILURE ANALYSIS, 2010, 17 (01) :168-176

[4]

[蔡晓静 Cai Xiaojing], 2015, [工程力学, Engineering Mechanics], V32, P25

[5] Effective Fatigue Stress and Criterion for High-Cycle Multi-axial Fatigue [J].

Cai, Xiaojing ;

Xu, Jinquan .

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2015, 24 (01) :158-166

[6] Crack Closure Effects on Fatigue Crack Propagation Rates: Application of a Proposed Theoretical Model [J].

Correia, Jose A. F. O. ;

De Jesus, Abilio M. P. ;

Moreira, Pedro M. G. P. ;

Tavares, Paulo J. S. .

ADVANCES IN MATERIALS SCIENCE AND ENGINEERING, 2016, 2016

[7] EFFECTS OF CRACK CLOSURE AND MEAN STRESS ON THE THRESHOLD STRESS INTENSITY FACTOR FOR FATIGUE OF AN ALUMINUM CASTING ALLOY [J].

COUPER, MJ ;

GRIFFITHS, JR .

FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES, 1990, 13 (06) :615-624

[8]

Doker H, 1997, INT J FATIGUE, V19, P145, DOI [10.1016/S0142-1123(97)00058-3, DOI 10.1016/S0142-1123(97)00058-3]

[9]

Dzugan J, 2014, MATER TEHNOL, V48, P959

[10] Effect of a dislocation pile-up at the neutral axis on trans-crystalline crack growth for micro-bending fatigue [J].

Eisenhut, Lena ;

Schaefer, Florian ;

Gruenewald, Patrick ;

Weiter, Laura ;

Marx, Michael ;

Motz, Christian .

INTERNATIONAL JOURNAL OF FATIGUE, 2017, 94 :131-139

← 1 2 3 4 →