Crystal plasticity FEM study of material and mechanical effects on damage accumulation mode of fatigue crack propagation

被引：12

作者：

Chen, Bowen ^{[1
]}

Hamada, Shigeru ^{[2
]}

Li, Wanjia ^{[1
,3
,4
]}

Noguchi, Hiroshi ^{[2
]}

机构：

[1] Kyushu Univ, Grad Sch Engn, Fukuoka 8190395, Japan

[2] Kyushu Univ, Fac Engn, Dept Mech Engn, 744 Moto Oka,Nishi Ku, Fukuoka 8190395, Japan

[3] Harbin Inst Technol, Sch Mechatron Engn, Harbin 150001, Heilongjiang, Peoples R China

[4] Harbin Inst Technol, Zhengzhou Res Inst, Zhengzhou 450000, Henan, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2023年 / 173卷

关键词：

Crystal plasticity FEM; Fatigue crack extension mode; Plastic normal strain localization; Grain size; Micromechanics; STRAIN LOCALIZATION; DISLOCATION EMISSION; IMAGE CORRELATION; DUCTILE FRACTURE; DEFORMATION; INITIATION; TIP; SIMULATIONS; GROWTH; GRAIN;

D O I：

10.1016/j.ijfatigue.2023.107683

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

To quantify the material and mechanical effects on the damage accumulation (DA) mode of fatigue crack propagation (FCP), a crystal plasticity finite element method was used in a polycrystalline copper specimen. Thus, the plastic normal strain localization ahead of the notch root, which is correlated with DA-FCP, was analyzed. As a result, an equation of the critical grain size formulated by the Schmid factor, misorientation angle, and plastic zone size is proposed to characterize the critical occurrence condition for the DA-FCP. Moreover, a method for predicting the DA-FCP region size is proposed.

引用

页数：14

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