Axisymmetric Stress Analysis and strength of Bonded Shrink-Fitted Joints of Solid Shafts Subjected to Push-Off Forces.

Abstract

This paper deals with analysis of stress in the adhesive layer of bonded shrink-fitted joints subjected to push off forces. The stress distributions in the adhesive layer of bonded shrink-fitted joints and those when the joints are subjected to push-off forces are analyzed as a four-body contact problem using the axisymmetrical theory of elasticity. The effects of the outer diameter and the stiffness of rings on the stress distributions in the adhesive layer are clarified by numerical calculation. Using the stress distributions in the adhesive layer, a method for predicting joint strength is proposed. It is seen that a rupture initiates from the lower edge of the outside surface in an adhesive layer. Experiments on joint strength were performed. The numerical results are in fairly good agreement with the experimental results. It is found that the joint strength increases as the outer diameler and Young's modulus of rings increase. In addition, it is found that the joint strength of bonded shrink-fitted joints is greater than that of unbonded shrink fitted joints.