Finite element modeling of plasticity-induced crack closure due to occasional mode II loading on mode I fatigue crack growth

被引：6

作者：

Matsunaga, H. ^{[1
,2
,3
]}

Makizaki, M. ^{[4
]}

Yanase, K. ^{[3
,4
]}

机构：

[1] Kyushu Univ, Dept Mech Engn, Nishi Ku, Fukuoka 8190395, Japan

[2] Kyushu Univ, Int Inst Carbon Neutral Energy Res I2CNER, Nishi Ku, Fukuoka 8190395, Japan

[3] Fukuoka Univ, Inst Mat Sci & Technol, Jonan Ku, Fukuoka 8140180, Japan

[4] Fukuoka Univ, Dept Mech Engn, Jonan Ku, Fukuoka 8140180, Japan

来源：

ENGINEERING FRACTURE MECHANICS | 2013年 / 111卷

关键词：

Crack closure; Finite element analysis; Fatigue crack growth; Occasional shear loading; CTOD; PLANE-STRAIN; REDUCTION; GEOMETRY; STRESS;

D O I：

10.1016/j.engfracmech.2013.09.001

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Plasticity-induced fatigue crack closure associated with occasional mode II loading was simulated for two-dimensional middle-crack tension geometry by using the finite element method. When a single mode II cycle was superposed onto the steady-state mode I crack growth, the range of crack tip opening displacement, Delta CTOD, exhibited the initial drop and subsequent recovery under plane strain condition. On the other hand, under plane stress condition, Delta CTOD exhibited the initial jump and drop right after the single mode II loading, and then it showed the recovery. The present results indicate that occasional mode II loading can cause a small retardation for mode I crack growth due to the enhanced plasticity-induced closure. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：38 / 49

页数：12

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