ELASTIC PLASTIC ASYMPTOTIC FIELDS FOR CRACKS ON BIMATERIAL INTERFACES

An exact asymptotic analysis for a crack lying on the interface of an elastic-plastic material and a linear elastic material is presented in this paper. The results obtained are free of oscillatory singularity and have the HRR type singularity in the plastic angular zone. Both the continuity of displacements and the continuity of tractions are satisfied on the interface. The crack faces open smoothly without any interpenetration. The interface behaves like a perfect elastic substrate. The asymptotic solutions of tip fields for cracks perpendicular to the interface are also obtained. © 1990.