Boundary element analysis of cracks at a fastener hole in an anisotropic sheet |
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| Authors: | M. Kamel B. M. Liaw |
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| Affiliation: | (1) Space Vehicles Division, Space and Communications Group, Hughes Aircraft, 90245 El Segundo, California, USA;(2) Department of Mechanical Engineering, The City College of The City University of New York, 10031 New York, USA |
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| Abstract: | Stress intensity factors for cracks emanating from a fastener hole are obtained, using the principle of superposition and a Green's function for a point force applied in an anisotropic sheet with an elliptical hole. Various loading cases, such as a point load, a uniform pressure applied on an arc, and a cosine distribution of pressure acting over half the circumference of the hole are considered to simulate the bolted-joint load. Both cases of a single crack and of two cracks of unequal lengths are studied. The accuracy and simplicity of the technique are demonstrated by comparing numerical results for various loading conditions and crack lengths with their known isotropic counterparts. |
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