Stress singularities in anisotropic three-material wedges and junctions with applications

This paper presents the general solutions of stress singularity in anisotropic three-material wedges and junctions. The influencing factors on the strength of stress singularity are the material constants, the fiber orientation and three wedge angles. Most emphasis has been placed on the roles of the intermediate material played in the structural design. The results can be applied to control the damage initiation and growth near the edge of the angle-ply or cross-ply laminated composite, such as the use of epoxy pocket (Chan, Composites Engineering Handbook, Marcel Dekker, Inc., New York, 1997, p. 309). By selecting appropriate stiffness and geometry of the interphase material, the damage resistance and durability of the structures can be improved.