A New Multiscale Modeling and Simulation of Rolling Contact Fatigue for Wind Turbine Bearings

Ghaffari, Mir Ali; Xiao, Shaoping

doi:10.1007/978-3-319-78166-2_4

Cited by 2 publications

(1 citation statement)

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“…This phenomenon plays an important role in the reliability of mechanical joint, stability of elastohydrodynamic lubrication, accumulation of wear, etc. In order to obtain the mechanical properties of contact between rough surfaces, several mechanical models have been developed, such as the statistical model, the fractal model, the multi-scale model, 1,2 the finite element model, 3,4 etc. The statistical model and the fractal model have been widely applied to different engineering fields.…”

Section: Introductionmentioning

confidence: 99%

A fractal model of contact between rough surfaces for a complete loading–unloading process

Yuan

Zhao

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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The mechanical properties of contact between rough surfaces play an important role in the reliability of the electromechanical system. In order to improve the design accuracy of precision instruments, an elastic-plastic contact model for three-dimensional rough surfaces based on the fractal theory is developed for a complete loading–unloading process based on the Majumdar and Bhushan model. The truncation size distribution functions of asperities for different values of asperity level in the loading process are given. Relationships between true contact area and total contact load in the complete loading–unloading process are obtained according to the truncation size distribution functions of asperities. The results show the range of asperity levels has significant effects on contact mechanical behaviors of fractal rough surfaces. When the first six levels of asperities do not exceed the critical elastic level, the fractal rough surfaces exhibit elastic behavior in a complete contact process, and the load–area relationships in the loading and unloading processes are coincident approximately. When the critical elastic level is less than the minimum level of asperity, the inelastic deformation begins to appear in fractal rough surfaces and the true contact area during the unloading process is always greater than the true area during the loading process for a given total contact load. In comparison with the K-K-E model, the present model is proved to be reasonable.

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Section: Introductionmentioning

confidence: 99%