Abstract
We examine frictional shakedown of a three dimensional elastic rolling contact. Slight oscillatory rolling of one contacting body varies the normal pressure distribution. In turn this causes incremental sliding processes and a macroscopic rigid body motion. We consider two settings: tangential force and rolling direction aligned parallel and perpendicular to each other. In both cases, the slip ceases after the first few periods and a safe shakedown occurs if the oscillation is sufficiently small. Otherwise ratcheting occurs and the accumulated slip leads to a continuing rigid body motion.
Numerical simulations with Kalker’s and Vollebregt’s software CONTACT show that the rolling direction leads to differences in the contact region and the traction distribution. Using the method of dimensionality reduction we derive the analytical shakedown limits for the tangential load and the oscillation amplitude. The results show strong agreement with experimental data and allow the accurate prediction of the shakedown displacement and the maximum tangential load capacity in the shakedown state. It shows that a perpendicular alignment of force and rolling direction increases the final displacement in case of shakedown as well as the incremental shift in case of ratcheting.
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Original Text © R. Wetter, V.L. Popov, 2014, published in Fizicheskaya Mezomekhanika, 2014, Vol. 17, No. 3, pp. 31–38.
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Wetter, R., Popov, V.L. Influence of the alignment of load and oscillation on the frictional shakedown of an elastic rolling contact with Coulomb friction. Phys Mesomech 17, 265–273 (2014). https://doi.org/10.1134/S1029959914040031
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DOI: https://doi.org/10.1134/S1029959914040031