Elastic Deformation of Surface Topography under Line Contact and Sliding-rolling Conditions

doi:10.3901/JME.2018.05.142

Abstract

Abstract: The elastic deformation of surface topography under EHL line contact condition is investigated by using a prediction method based on the spectrum analysis of surface topography and lubrication theory. Four textured surfaces which have same value of arithmetical mean height S_a but with different topography structure are manufactured. By reducing the amplitude of harmonic components and combining with EHL model, an algorithm is established, and the elastic deformation results of four textured surface topographies under different load and speed conditions are obtained. The height parameter S_a, the function parameter V_vv and the feature parameter S_ds in the ISO 25178 are selected to characterize and analyze the surface topography before and after deformation. By calculating the film thickness ratios, the lubrication characteristics of four textured surfaces before and after elastic deformation are compared. The results show that the elastic deformation of the textured surfaces is obvious in the contact process, and the change of 3D surface topography parameters shows different trend with the change of load and rotational speed. The variation of 3D surface topography caused by elastic deformation has obvious influence on the lubrication property of the contact surfaces.

Key words: elastic deformation, lubrication property, spectrum analysis, surface topography

CLC Number:

TH117

LI Zhi, CHEN Jian, SHEN Jinlong, LIU Kun. Elastic Deformation of Surface Topography under Line Contact and Sliding-rolling Conditions[J]. Journal of Mechanical Engineering, 2018, 54(5): 142-148.

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