A microcontact model developed for asperity heights with a variable profile fractal dimension, a surface fractal dimension, topothesy, and non-Gaussian distribution

Jeng Luen Liou, Jen-Fin Lin

研究成果: Conference contribution

摘要

The cross sections formed by the contact asperities of two rough surfaces at an interference are island-shaped, rather than having the commonly assumed circular contour. These island- shaped contact surface contours show fractal behavior with a profile fractal dimension Ds, The surface fractal dimension for the asperity heights is defined as Ds and the topothesy is defined as G In the study of Mandelbrot. the relationship between D s and Ds was given as D= Ds+1 if these two fractal dimensions are obtained before contact deformation. In the present study, D, G, and Ds are considered to be varying with the mean separation (or the interference at the rough surface) between two contact surfaces. The D-Ds relationships for the contacts at the elastic, elastoplastic, and fully plastic deformations are derived and the inceptions of the elastoplastic deformation regime and the fully plastic deformation regime are redefined using the equality of two expressions established in two different ways for the number of contact spots (N).

原文English
主出版物標題2008 Proceedings of the STLE/ASME International Joint Tribology Conference, IJTC 2008
頁面549-551
頁數3
出版狀態Published - 2009 十月 16
事件2008 STLE/ASME International Joint Tribology Conference, IJTC 2008 - Miami, FL, United States
持續時間: 2008 十月 202008 十月 22

出版系列

名字2008 Proceedings of the STLE/ASME International Joint Tribology Conference, IJTC 2008

Other

Other2008 STLE/ASME International Joint Tribology Conference, IJTC 2008
國家/地區United States
城市Miami, FL
期間08-10-2008-10-22

All Science Journal Classification (ASJC) codes

  • 流體流動和轉移過程
  • 製程化學與技術
  • 機械工業

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