Compression of Semibounded Body with Thin Coating Layer Along Interface Near Surface Crack. Part II

Using the relations of the three-dimensional linearized theory of stability of deformable bodies, a plane problem on the compression of a semibounded body (foundation) with a coating layer along a near-surface crack located on the rectilinear interface between the foundation and the coating is studied. A piecewise homogeneous body model is applied, assuming that the coating material is stiffer than the foundation material. The material buckling in the local domain near the interfacial crack as the initial stage of fracture is analyzed. The obtained critical load parameters are compared with the critical parameters corresponding to the surface buckling of the semibounded coated body in the absence of the interfacial crack. The conditions under which the critical values of compressive loads for the semibounded material with the interfacial crack are significantly lower than the critical values of compressive loads for the piecewise homogeneous material without crack are determined.