Defect formation in nanocomposites considering interface effect

The critical condition for the generation of a screw dislocation dipole defect inside a nanocomposite, at the interface between a nanowire reinforcement with uniform shear misfit strain and its surrounding unbounded matrix within surface/interface elasticity theory is of particular interest. The analysis is carried out using the complex potential variable method. It is shown that the critical radius of the reinforcement corresponding to the onset of the defect generation decreases with the increase in the uniform shear eigenstrain inside the reinforcement as well as when the stiffness of the reinforcement increases with respect to the matrix. The critical radius strongly depends on the non-classical interface parameter. Comparison is made with classical solution, which can be obtained as the special case of the surface/interface elasticity theory.

Keywords:

Nanocomposites , Defect , Interface effect , Dislocation dipole.