Abstract
In this paper a flat plate containing a relatively long and deep part-through crack and subjected to uniform membrane and bending loads is considered. It is assumed that the net ligament and the plate wall in some neighborhood of the crack are fully yielded. In analyzing the problem Reissner's Theory of plate bending is used. The plastic deformations are taken into account by using a plastic strip model. First some elastic results regarding the interaction of two collinear cracks are obtained. The crack opening displacement at various locations in the plate is then calculated for various crack sizes and stress ratios.
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