STRESS SINGULARITY IN 3-PHASE BONDED STRUCTURE

The plane problem of three-phase materials consisting of three isotrop ic homogeneous wedges with arbitrary angles, which are with two interf aces and two free surfaces, is analyzed under arbitrary normal and she aring tractions by the theory of elasticity. An eigenequation to exami ne the order of stress singularity at the apex in the three-phase bond ed structure is analytically derived. In particular, this paper emphas izes to investigate the older of singularity in the stress field at th e apex when materials of both side regions against intermediate region in three regions are identical. For several bonded wedge geometries, it is demonstrated how the order of stress singularity varies with mat erial pairs. Finally, it is shown that the bonding order of materials also influences on the order of stress singularity in the three-phase bonded structure.