Design and Test a load-varying apparatus for wear test device

Document Type : Original Article

Authors

1 Department of Engineering and Technology, Shahrekord University, Shahrekord, Iran

2 Department of engineering and technology, shahrekord university

10.22034/asm.2024.14811.1024

Abstract

Contact conditions variation with time challenge the common steady state lubrication characteristic estimations. Wear test devices usually apply a constant load on the contact surfaces. These apparatuses should improve to have the possibility of time variation condition testing. In this study, a load-varying system has been designed to complete the pin-on-disk wear test device. By adding this system, it is possible to change the load with time in different patterns. The intensity of the current passing through a magnetic coil which is mounted on the load lever is controlled by an electronic control unit to produce instance load. Several tests are designed with 10w40 oil as lubricant in the contact between the pin of 100-chrome-6 bearing steel and the ST37 steel disc. Four different patterns of time-varying load, including ascending, descending, sinusoidal, and ascending-descending patterns are investigated. The results show that the variable load created by the system completely affected the contact friction behavior and the type of load change pattern was effective in the measured friction force. The change of friction force in all cases decreased with the increase of the linear speed. It was shown that the friction coefficient shows the opposite behavior to the pattern of normal load in a complete cycle.

Keywords

Advanced Structural Mechanics
Volume 1, Issue 4
September 2023

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History

  • Receive Date: 12 June 2024
  • Revise Date: 19 July 2024
  • Accept Date: 22 July 2024

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