期刊
MECHANICS OF MATERIALS
卷 85, 期 -, 页码 80-93出版社
ELSEVIER
DOI: 10.1016/j.mechmat.2015.02.015
关键词
Interface crack; Bi-material; Nonoscillatory singularity; Full elastic field; Shear; Compression
资金
- Open Foundation of State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, P.R. China [GZ1308]
- Faculty Research Foundation of Central South University, P.R. China [2013JSJJ020]
- Science Project of the National University of Defense Technology, P.R. China [JC13-01-03]
A two-dimensional elastic analysis is made for a crack lying at the interface between two bonded dissimilar homogeneous isotropic media subjected to shear and compression. The Fourier transform technique is applied to reduce the problem to dual integral equations, and the solution is obtained in closed form. Full stress fields at an arbitrary position of the whole bi-material plane induced by a closed mode-II interface crack are explicitly obtained for uniform and linearly distributed shear stress at the crack surface, respectively. The stress intensity factors are gained in closed form. Obtained results indicate that the shear stresses ahead of the crack tip exhibit a usual square-root singularity, rather than oscillatory singularity. Disturbed normal stresses are also singular at the crack surfaces behind the crack tips and depend on a Dundurs' parameter. Using the maximum tangential stress criterion, the Dundurs' parameter has an influence on the initiation angle of an interface crack in mixed compression-shear mode. (C) 2015 Elsevier Ltd. All rights reserved.
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