Abstract
Shrink fit joining a solid shaft and a cylinder requires an accurate estimate of the residual contact pressure to transmit high powers, as in the case of gas turbines. Such torques require deformations of materials beyond their elastic limits. This paper presents an analytical model that analyses the stresses in a shrink fit assembly consisting of a solid shaft and a cylindrical hub operating in the elastic-plastic range. Assuming the hub to have a nonlinear work-hardening material behavior, the distribution of stresses as functions of the interference, and the effect of geometry on contact pressure and on interference are exhibited. To validate the analytic method, Finite Element Method was used.
Highlights
Shrink fit is a technique of joining together two mechanical components usually a hollow or solid shaft and a cylinder
Most of the literature is interested in the stresses in the plastic domain of another geometries, for instance, Burenin et al [3] presented a problem of a shrink fit of a clutch on a shaft, that takes into account the dependence of the yield material strength on the temperature
It presents an analytical model to analyze the distribution of residual stresses in an interference fit assembly composed of two-hollow cylinders
Summary
Shrink fit is a technique of joining together two mechanical components usually a hollow or solid shaft and a cylinder. This article is devoted to an assembly with solid shaft, since it is more favored thanks to its ability to maintain the state of stress in the elastic domain It is widely used in different mechanical engineering applications such as aircraft engines and aerospace turbopumps. Researchers started with thin cylinder theory and assumed a linear strain hardening behavior of the ring material, namely Gamer and Lance in [1] developed an analytic solution of stresses and displacements as a function of the interference in an elastic-plastic shrink fit with hollow shaft. It presents an analytical model to analyze the distribution of residual stresses in an interference fit assembly composed of two-hollow cylinders. They obtained the relationship that binds the pressure to the interference using strain hardening parameters. It is assumed that the hub material follows a power law hardening behavior
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