Contact pressure in interference joint with modified grooves of shallow depth

Abstract

The analytical method for determining the magnitude of the contact pressure in a cylindrical interference joint with shallow depth grooves is described in the publication. This method takes into account the geometric features and the relative position of the external members. The calculated dependences are based on the Lame’s formulas are given in the publication. They can be used to assess the bearing capacity of the joint at any macrogeometry of the joint, independently of the number, shape, size of grooves and their location. The method is different by simplicity and visibility. It provides sufficient accuracy of results for engineering calculations.

Finite Element Analysis of the Reduction in Stress Concentration Factors in Shrink Fits by Using Contact Rings

“…Design equations can be derived from the obtained results in terms of the linear interpolation of the curves shown in Figure 15a. η r (E) = 0.00598 E + 0.83372, R 2 = 0.9826, γ = 0.125 (6) η r (E) = 0.00736 E + 0.55252, R 2 = 0.9896, γ = 0.250 (7) η θ (E) = 0.00542 E − 0.09779, R 2 = 0.9920 (8) η vM (E) = 0.00505 E + 0.13096, R 2 = 0.9925 (9) According to the results, a correlation coefficient higher than 0.98 is obtained, so these equations can be useful for estimating the degree of reduction in terms of the Young modulus of the material used in the contact ring within the interval analyzed.…”

“…This case is very common in mechanical engineering, with the shaft length longer than the hub length. Accordingly, the values obtained using the theoretical equations are not realistic for estimating the contact pressure and the stress that both parts undergo [3,6,9]. This is an issue of major concern since those stress concentrations can limit the service life in adequate conditions of the joint, leading to failure [10][11][12][13].…”