Elastoplastic FEM stress analysis and strength evaluation of adhesive tapered lap joints of hollow shafts subjected to tensile loads

摘要

Tensile strength of adhesively bonded tapered lap joints of hollow shafts is investigated in this study. In tapered lap joint, bonded area increases and assembly and adjusting of the shafts are easy because of its self-aligning effect. In the experiments, at first, the elastoplastic stress-strain behavior of the adhesive was measured by uni-axial tensile test of the bulk specimen and then the tensile strengths of the joints with various taper angle were tested. In the analysis, the stress distributions at the interface between the shafts and the adhesive are calculated by the finite element method taking the elastoplastic behaviors of the adhesive and the shafts into consideration. A tensile strength prediction method is proposed based on the numerically obtained stress distributions and its features are discussed by comparing the measured strengths with the predicted ones.