Misfit dislocation dipoles in coated fibrous composites

作者：Wang, Xu; Zhou, Kun^*

来源：Mechanics Research Communications, 2013, 52: 88-91.

DOI：10.1016/j.mechrescom.2013.07.004

• Misfit dislocation dipole
• Fibrous composite
• Inclusion
• Equilibrium position

We investigate the stability of a misfit screw dislocation dipole in a coated fibrous composite. The fiber is stiffer whereas the coating is more compliant than the matrix. A critical coating thickness is identified for given material parameters of the composite. For a compliant coating below the critical thickness, there exist an inner unstable and an outer stable equilibrium position in the matrix for the dislocation dipole. However, for a compliant coating above the critical thickness, the dislocation dipole will be attracted to the coating-matrix interface. If the coating thickness is greater than the inclusion radius, the dislocation dipole cannot lodge in the matrix no matter what values of the material parameters are chosen.

• 出版日期2013-9
• 单位南阳理工学院; 华东理工大学