Mode-III interface crack in a bi-material with initial stress and couple stress

被引：11
作者：
Chen, J. [1 ]
Wang, Y. W. [1 ]
Zheng, R. Y. [2 ]
Li, X. F. [1 ]
机构：
[1] Cent South Univ, Sch Civil Engn, Changsha 410075, Peoples R China
[2] Ningbo Univ, Key Lab Impact & Safety Engn, Minist Educ, Ningbo 315211, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2023年 / 281卷
基金：
中国国家自然科学基金;
关键词：
Interface crack; Couple stress; Initial stress; Mode-III crack; Stress intensity factors; Energy release rate; STRAIN GRADIENT THEORY; FINITE-ELEMENT-METHOD; ENERGY-RELEASE RATE; ELECTRIC-FIELD; ELASTICITY; MICROSTRUCTURE; PROPAGATION; FRACTURE; STRIP; BEAMS;
D O I：
10.1016/j.engfracmech.2023.109135
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The couple-stress elasticity is applied to study an anti-plane shear crack at the interface between two bonded dissimilar elastic media with initial stresses. First, the deviatoric couple stress tensor is proven. The governing equation alongside associated boundary conditions is derived. Using the eigenfunction expansion method, the singularity index is determined. Then, the Fourier transform is employed to convert the mode-III interface crack problem to a hypersingular integral equation. Using the Chebyshev series method, the resulting hypersingular integral equation is numerically solved. The crack-tearing-displacement, couple-/force-stress intensity factors, and energy release rate are evaluated to reveal the influence of the intrinsic characteristic lengths, couple-stress material constants, and initial stresses.
引用
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页数：20
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