A theory of gradient micropolar elasticity, based upon the first gradients of distortion and bend–twist tensors for an isotropic micropolar medium was proposed. Gradient micropolar elasticity was an extension of micropolar elasticity such that, in addition to double stresses, double couple stresses also appeared. The strain-energy depended upon the micropolar distortion and bend–twist terms, as well as upon distortion and bend–twist gradients. A version of this gradient theory was used which could be connected to Eringen’s non-local micropolar elasticity. The theory was used to study a straight-edge dislocation, and a straight-wedge disclination. One important result was that non-singular expressions were obtained for the force and couple stresses. In the case of the edge dislocation, the components of the force stress had extremum values near to the dislocation line. Those of the couple stress had extremum values at the dislocation line. In the case of the wedge disclination, the components of the force stress had extremum values at the disclination line. Those of the couple stress had extremum values near to the disclination line.

Defects in Gradient Micropolar Elasticity – II. Edge Dislocation and Wedge Disclination. M.Lazar, G.A.Maugin: Journal of the Mechanics and Physics of Solids, 2004, 52[10], 2285-307