Fractal model developed for elliptic elastic-plastic asperity microcontacts of rough surfaces

Jung Ching Chung, Jen Fin Lin

研究成果: Article同行評審

34 引文 斯高帕斯(Scopus)

摘要

An elastic-plastic asperity fractal model for analyzing the contact of rough surfaces is presented. Instead of using the power-law relation, which is widely used to predict the number N, of contact spots with the area larger than the area of a′ in per unit apparent area, the size-distribution functions valid in the elastic, elastoplastic, and fully plastic deformations have been individually developed in the present model for contact surfaces with elliptic asperities. These three size-distribution functions can be used in the calculations of the N value. The error in the number N, which exists between the results predicted by the present model and those obtained from experiments, is greatly reduced as compared with the error arising between the experimental results and those predicted by the power-law model. If the topothesy, G, and the firactal dimension, D, of contact surfaces are properly chosen to conform to those given plasticity indices, the results predicted by the present model are considerably closer to that predicted by one published study. Changes in the ellipticity parameter of contact spots may introduce a substantial difference in the relationship established for the real contact area and the total load.

原文English
頁(從 - 到)646-654
頁數9
期刊Journal of Tribology
126
發行號4
DOIs
出版狀態Published - 2004 10月 1

All Science Journal Classification (ASJC) codes

  • 材料力學
  • 機械工業
  • 表面和介面
  • 表面、塗料和薄膜

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