The Problem of an Inclined Crack in an Orthotropic Strip

[+] Author and Article Information
F. Delale, I. Bakirtas, F. Erdogan

Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, Pa. 18015

J. Appl. Mech 46(1), 90-96 (Mar 01, 1979) (7 pages) doi:10.1115/1.3424534 History: Received April 01, 1978; Revised July 01, 1978; Online July 12, 2010


The elastostatic problem for an infinite orthotropic strip containing a crack is considered. It is assumed that the orthogonal axes of material orthotropy may have an arbitrary angular orientation with respect to the orthogonal axes of geometric symmetry of the uncracked strip. The crack is located along an axis of orthotropy, hence at an arbitrary angle with respect to the sides of the strip. The general problem is formulated in terms of a system of singular integral equations for arbitrary crack surface tractions. As examples Modes I and II stress-intensity factors are calculated for the strip having an internal or an edge crack with various lengths and angular orientations. In most calculations uniform tension or uniform bending away from the crack region is used as the external load. Limited results are also given for uniform normal or shear tractions on the crack surface.

Copyright © 1979 by ASME
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