Modified Experimental Approach to Investigate Coefficient of Friction under Lubricated Fretting Condition by Utilizing SRV Test Machine

Paper #:
  • 2018-01-0835

Published:
  • 2018-04-03
Author(s):
Affiliated:
Abstract:
Fretting damage is an important phenomenon that happens in many mechanical parts. This phenomenon was the main reason in deadly failures in automotive industry, airliners, and turbine engines. The damage is noticed between any two surfaces clamped together by bolts or rivets that have a relative motion with a small amplitude oscillation because of vibration or local cyclic loading which are nominally at rest. Fretting damage can be divided into two types: First, the fretting fatigue damage where a crack would initiate and propagate at specific location at the interface of the mating surfaces. Cracks usually initiate in the material with the lower strength because of the local cyclic loading conditions which eventually lead to full early failure. Second, the fretting wear damage because of external vibration. Researchers have investigated this phenomenon by theoretical modeling and experimental approaches. Although a lot of research has been done on fretting damage, some of the parameters have not been well studied under lubricated condition. In this study, the fretting damage mechanism was simulated by utilizing SRV test machine to obtain the real time coefficient of friction. A large spherical surface (about 34 mm in radius) on flat setup was used to run the test under lubricated condition. The parameters that were investigated include load, oscillation amplitude, oscillation frequency, temperature, material, and surface profile. It was found that all the studied parameters had a moderate effect on coefficient of friction except the temperature that has little effect. In terms of wear scar analysis, the study showed that increasing contact pressure, oscillation amplitude and oscillation frequency caused an increase in wear scar width and depth by 30 to 45% for most testes.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Attention: This item is not yet published. Pre-Order to be notified, via email, when it becomes available.
Select
Price
List
Download
$22.00
Mail
$22.00
Members save up to 36% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Event
2018-04-10
Video
2017-03-26
Technical Paper / Journal Article
2011-05-17
Technical Paper / Journal Article
2011-05-17