Effect of crack flank holes on fatigue crack growth

被引：4
|
作者：
Neto, D. M. [1 ]
Cavaleiro, N. [1 ]
Sergio, E. R. [1 ]
Jesus, J. [1 ,2 ]
Camacho-Reyes, A. [3 ]
Antunes, F. V. [1 ]
机构：
[1] Univ Coimbra, Ctr Mech Engn Mat & Proc, Mech Engn Dept, CEMMPRE, P-3030788 Coimbra, Portugal
[2] Lisbon Polytech ISEL, Dept Mech Engn, Rua Conselheiro Emidio Navarro 1, P-1959007 Lisbon, Portugal
[3] Univ Jaen, Dept Ingn Mecan & Minera, Jaen, Spain
来源：
INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 170卷
关键词：
Fatigue crack growth; CT specimen; Crack flank holes; Crack closure; Numerical simulation; COLD-EXPANSION; RETARDATION; INDENTATION; OVERLOAD; CLOSURE; STRESS; REPAIR; ARREST; STEEL; TIP;
D O I：
10.1016/j.ijfatigue.2023.107505
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The effect of drilling two symmetric holes along the crack flanks on the fatigue crack growth (FCG) rate was evaluated numerically. The FCG increases (decreases) when the crack tip is behind (ahead) the holes. This behaviour is enlarged both by increasing the diameter of the holes and by reducing the distance between them. This is consequence of the geometrical effect, which modifies the plastic zone size. Experimental work validated the numerical model, indicating that that cumulative plastic strain at the crack tip is an adequate crack driving force and that cyclic plastic deformation is the main damage mechanism of FCG.
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页数：11
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