Analysis of intensity of singular stress field for bonded cylinder and bonded pipe in comparison with bonded plate

In this paper, the intensity of the singular stress field (ISSF) for a bonded cylinder and boned pipe is compared with the ISSF for the bonded plate. The analysis method focuses on the FEM stress at the interface end by applying the same mesh pattern to the unknown and reference problems. It is found that the mesh-independent technique useful for the bonded plate cannot be directly applied to the bonded axisymmetric structures because the circumferential strain causes non-singular stress disturbs singular stress evaluation. In order to eliminate this disturbance, explicit non-singular expressions are derived from the boundary conditions and subtracted from the FEM results. Then, the ISSFs for the bonded cylinder and the bonded pipe are calculated by changing the material combinations systematically. Since Dundurs’ parameters cannot totally control the axisymmetric bonded structures, the maximum and minimum values of ISSF are shown in tables and charts under arbitrary material combination. It is found that the ISSFs of bonded cylinder and bonded pipe are at most 1.5 times larger than that of the bonded plate.