Stepped-lap adhesive joints with dissimilar solid and hollow cylinder adherends under static tensile loading are analyzed using axi-symmetrical FEM. The effects of Young's modulus ratio between the dissimilar adherends，adhesive Young's modulus，the adhesive thickness，scarf angle，the number of steps on the interface stress distributions are examined. The code of FEM employed is ANSYS. Themaximum principal stress s1 is singular at the outside edge of the interfaces for the dissimilar solid cylinder joint. While，the value of s1 is larger at the inside diameter than that at the outside diameter for the dissimilar hollow cylinder joints. The value of s1 at the edges of the interface increases as Young's modulus ratio between the dissimilar adherends in both the joints decreases. The value of s1 decreases as the adhesive thickness decreases and as adhesive Young's modulus，the number of steps and the scarf angle increase. The joint strengths are predicted using the measured stress-strain curve of the adhesive. The predicted strengths for the both joints are in a fairy good agreement with the measured results. It is found that the strength for dissimilar solid cylinder joints is slightly bigger than that for dissimilar hollow cylinder joints.

In this paper，the effect of material characteristics on plastic forming of adhesively bonded dissimilar sheet metals was investigated by experiments and finite element method (FEM). The acrylic adhesive employed in the experiments has visco-plasticity characteristics with high ductility and strong strain-rate and temperature sensitivity in strength. Major results obtained are summarized as follows: (1) In the adhesively bonded dissimilar sheet metals，the gull-wing bend and the shear deformation of the adhesive layer are suppressed by the combination of the sheet metals when a bending inside sheet has high-tensile strength. (2) The gull-wing bend is suppressed by high-speed forming at a lower temperature as well as the same kind of sheet metals. (3) The anaytical results using MSC. Marc2010 are relatively good agreement with the experimental results.