The effects of laminated composite patch with different stacking sequences on bonded repair

Abstract

This paper discusses the effect of laminated composite patch with different stacking sequences on repairing an inclined central cracked plate under biaxial loads. By means of the finite element method and the strain energy density theory, the results show that the optimal ply orientations of the patch are the three directions 90° and ± 45° related to the crack direction. Also, the use of different stacking sequences for the patch does not affect the energy distribution near the crack tip significantly.