Edge dislocation inside a lamellar inhomogeneity.

The elastic field induced by an edge dislocation inside a lamellar inhomogeneity is evaluated, the resulting formulas applying as well to an internal stress source within a lamella in generalized plane stress or plane strain, and the Peach-Koehler force on the dislocation derived. The fatures of the interaction are determined by the mismatch in both the shear moduli and the Poisson's ratios of lamella and matrix. The differences from the case of an edge dislocation in either a free or a clamped strip turn out to be mainly of a quantitative nature and to become relevant when the lamella is up to one order of magnitude harder or softer than the matrix.