Effects of non-Gaussian counter-surface roughness parameters on wear of engineering polymers

Effects of non-Gaussian counter-surface roughness parameters on wear of engineering polymers This work was aimed to study on how wear of engineering polymers depends on the topography of counter-surfaces of non-Gaussian type. Instead of widely used Gaussian distribution of surface heights, the Weibull distribution was used here to model asperity heights distribution of the counter-surface. The key surface roughness parameters to characterize the distribution were chosen to be standard deviation, skewness, and kurtosis. Corresponding Weibull parameters were evaluated from both skewness and kurtosis values according to a customized methodology. Some basic wear equations have been extended and modified with Weibull distribution of asperity heights. Study revealed that all of the three surface roughness parameters of hard metal counter-surface substantially influence wear of soft polymers. Experiments have also been carried out with PEEK pins rubbing on 316L stainless steel disc in a typical pin-on-disc setup, and meaningful agreement was noted between some experimental findings and theoretical predictions. A wear severity chart for polymer while rubbed against hard metal surfaces under low load and speed was proposed from the comparative deliberations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Wear Elsevier

Effects of non-Gaussian counter-surface roughness parameters on wear of engineering polymers

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Publisher
Elsevier
Copyright
Copyright © 2015 Elsevier B.V.
ISSN
0043-1648
eISSN
1873-2577
D.O.I.
10.1016/j.wear.2015.01.020
Publisher site
See Article on Publisher Site

Abstract

This work was aimed to study on how wear of engineering polymers depends on the topography of counter-surfaces of non-Gaussian type. Instead of widely used Gaussian distribution of surface heights, the Weibull distribution was used here to model asperity heights distribution of the counter-surface. The key surface roughness parameters to characterize the distribution were chosen to be standard deviation, skewness, and kurtosis. Corresponding Weibull parameters were evaluated from both skewness and kurtosis values according to a customized methodology. Some basic wear equations have been extended and modified with Weibull distribution of asperity heights. Study revealed that all of the three surface roughness parameters of hard metal counter-surface substantially influence wear of soft polymers. Experiments have also been carried out with PEEK pins rubbing on 316L stainless steel disc in a typical pin-on-disc setup, and meaningful agreement was noted between some experimental findings and theoretical predictions. A wear severity chart for polymer while rubbed against hard metal surfaces under low load and speed was proposed from the comparative deliberations.

Journal

WearElsevier

Published: May 1, 2015

References

  • Development of an equation for the wear of polymers
    Vishwanath, N.; Bellow, D.J.

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