Stress Analysis and the Strength Estimation of the Bonded Shrink Fitted Joints Subjected to Torsion

Recently, joints combining shrink fit with anaerobic adhesives (bonded shrink fitted joint) have been appeared in order to increase the joint strength. This paper deals with stress analysis and strength estimation of the bonded shrink fitted joints in which the ring is fitted at the end/middle of the hollow shafts subjected to torsion. The stress distributions at the interface of the joints are analyzed using axisymmetric theory of elasticity as a three-body contact problem. The effect of the inner diameter of a shaft, outer diameter, height of and stiffness of the ring on the interface stress distributions are examined in the numerical calculations. It is found that a rupture of adhesive layer initiates from the edge of the interfaces close to the end of the shaft to which a torsional load is applied. The numerical results show more conservative values than the experimental results. In addition, the stress distributions in the present study are compared with those in which a ring is fitted at the middle of the shaft. It is found that the effect of shrink fitted position is negligible. In addition, it can be concluded that the strength of the bonded shrink fitted joint is greater than the conventional the shrink fitted joint without an anaerobic adhesive.