Elastic field due to dislocation loops in isotropic bimaterial with dislocation-like and force-like interface models

Abstract

Based on the two-dimensional discrete Fast Fourier Transformation (FFT) method, a semi-analytical solution is developed for calculating the elastic fields of dislocation loops within isotropic bimaterials, where the imperfect interface can be described as two types of models: (a) dislocation-like and (b) force-like. Calculation examples of dislocation loops within Al–Cu bimaterials are performed to verify the reliability of the semi-analytical approach. Effects of constant matrix for the dislocation-like and force-like models on the interface elastic fields are studied, and it is shown that the interface elastic field is remarkably influenced by the interface conditions. Comparisons between perfect-bonding, dislocation-like and force-like imperfect interface models are performed to study the effects of interface conditions on the in-plane and out-of-plane elastic fields across the bimaterial interface plane.