ИСТИНА

Stress analysis in structures with interface bridged cracks and damaged zones was performed with the direct boundary integral equations method in axisymmetric formulation. In the framework of this approach is assumed that: a) the crack faces interact in some zones behind of crack tips (bridged zones); b) these zones sizes can be comparable to the whole crack length; c) adjacent parts of the structure can be connected by mechanical ligaments (including interfaces ahead of cracks tips) and the relative displacements of these parts can occur under the loading (these zones consider as damaged zones). In axisymmetric problems these relative displacements can be subdivided into two components: 1) the transverse sepa-ration; 2) the slip tangent to the adjacent parts faces.