A dislocation dipole contains two coplanar edge dislocations of the same magnitude of Burgers vector but opposite signs. The dislocation lines are separated by a distance δ.
(a) Calculate the shear stress due to the dipole on a parallel plane a distance k away from the plane of the dipole, for k>> δ.
(b) Determine the positions of equilibrium of a positive edge dislocation on the y = k plane.