Simple Evaluation of Thermally-Induced Stresses in the Vicinity of the Stitch in a Through-Thickness Reinforced Cross-Ply Laminate

摘要

The stresses in the vicinity of a single stitch through the thickness of an infinite cylindrical cross-ply laminate subjected to a unit temperature decrease are computed. Interest centers on the potential for microcracking in the vicinity of the through-thickness reinforcement. The infinite cylindrical cross-ply model is a simplification which leads to a tractible axisymmetric formulation, but which retains many of the three-dimensional features of the problem. In the model the stitch is a through-thickness cylinder consisting of fibers and resin and the laminate consists of plys with fibers oriented radially and plys with fibers oriented circumferentially. Here only a (0/90)2S laminate is examined.