Stress intensity factor analysis of an interface crack between dissimilar anisotropic materials under thermal stress using the finite element analysis |
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Authors: | Masaki Nagai Toru Ikeda Noriyuki Miyazaki |
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Affiliation: | (1) Department of Mechanical Engineering and Science, Kyoto University, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan |
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Abstract: | New numerical methods were presented for stress intensity factor analyses of two-dimensional interfacial crack between dissimilar
anisotropic materials subjected to thermal stress. The virtual crack extension method and the thermal M-integral method for a crack along the interface between two different materials were applied to the thermoelastic interfacial
crack in anisotropic bimaterials. The moving least-squares approximation was used to calculate the value of the thermal M-integral. The thermal M-integral in conjunction with the moving least-squares approximation can calculate the stress intensity factors from only
nodal displacements obtained by the finite element analysis. The stress intensity factors analyses of double edge cracks in
jointed dissimilar isotropic semi-infinite plates subjected to thermal load were demonstrated. Excellent agreement was achieved
between the numerical results obtained by the present methods and the exact solution. In addition, the stress intensity factors
of double edge cracks in jointed dissimilar anisotropic semi-infinite plates subjected to thermal loads were analyzed. Their
results appear reasonable. |
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Keywords: | Stress intensity factor Interface crack Anisotropic material Stroh formalism Moving least-squares approximation |
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