An experimental investigation is presented to evaluate recently published models for the contact and sliding inception of a deformable sphere loaded against a smooth rigid flat. The effects of the normal load on the contact area, junction growth, and the static friction force in the elastic–plastic contact regime are presented. Very good correlation is found between the predicted and measured contact area. A dramatic decrease of the static friction coefficient with increasing normal loading is observed, similar to the trend predicted by the model. The quantitative agreement is, however, less satisfying. Some possible reasons for the poor agreement are pointed out.
Experimental Investigation of the Elastic–Plastic Contact Area and Static Friction of a Sphere on Flat
Contributed by the Tribology Division for publication in the ASME JOURNAL OF TRIBOLOGY. Manuscript received by the Tribology Division May 5, 2004; revised manuscript received August 26, 2004. Review conducted by: Q. Wang.
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Etsion, I., Levinson , O., Halperin , G., and Varenberg, M. (February 7, 2005). "Experimental Investigation of the Elastic–Plastic Contact Area and Static Friction of a Sphere on Flat ." ASME. J. Tribol. January 2005; 127(1): 47–50. https://doi.org/10.1115/1.1843834
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