Tribological behavior and thermoelastic instability demonstrated in ball-bearing -like specimens operating in dry contacts and with grease lubrication

Chang Fu Han, Hsiao Yeh Chu, Po Chun Kuo, Neng Tung Liao, Yih Chyun Hwang, Yueh Lin Chiu, Jen Fin Lin

研究成果: Article同行評審

5 引文 斯高帕斯(Scopus)

摘要

Ball-bearing-like specimens are prepared with different groove factors (GF) to simulate a ball screw operating in dry contact and grease lubrication. The fluctuations of frictional coefficient μ are identified as instabilities in the running-in process and in the tribo contacts through the model developed for the threshold value μthreshold. The thermoelastic instability in the running-in is dominated by the surface roughness (Ra) and the GF, and is thus governed by the slip ratio (SR). The inception of running-in instability is the earliest when SR is the highest. With a fixed GF, an increase in Ra results in a SR rise. Wear coefficient increases by raising SR. The time for instability inception of base material is shortened by increasing SR.

原文English
頁(從 - 到)358-369
頁數12
期刊Tribology International
110
DOIs
出版狀態Published - 2017

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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