The Area of Contact Between Rough Surfaces and FlatsSource: Journal of Tribology:;1967:;volume( 089 ):;issue: 001::page 81Author:J. A. Greenwood
DOI: 10.1115/1.3616906Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: If the real area of contact between surfaces is determined by ideal plastic flow of the microcontacts, then the proportionality between the area of contact and the load follows immediately. If the deformation mode is elastic, or elastic-plastic, or plastic with work-hardening, which will be the usual cases, then the proportionality is harder to explain. However, by considering the statistical distribution of heights of the surface asperities, it can be shown that the average size of a microcontact is almost constant, independent of load; consequently, the fact that the contact pressure at a single micro-contact may vary with contact size becomes irrelevant. If the real origin of the laws of friction is in the statistics of surface roughness and not in a particular mode of deformation, the applicability of the Bowden and Tabor theory of friction to plastics and other nonmetals becomes more readily understandable.
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contributor author | J. A. Greenwood | |
date accessioned | 2017-05-09T00:01:52Z | |
date available | 2017-05-09T00:01:52Z | |
date copyright | January, 1967 | |
date issued | 1967 | |
identifier issn | 0742-4787 | |
identifier other | JOTRE9-28537#81_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/123367 | |
description abstract | If the real area of contact between surfaces is determined by ideal plastic flow of the microcontacts, then the proportionality between the area of contact and the load follows immediately. If the deformation mode is elastic, or elastic-plastic, or plastic with work-hardening, which will be the usual cases, then the proportionality is harder to explain. However, by considering the statistical distribution of heights of the surface asperities, it can be shown that the average size of a microcontact is almost constant, independent of load; consequently, the fact that the contact pressure at a single micro-contact may vary with contact size becomes irrelevant. If the real origin of the laws of friction is in the statistics of surface roughness and not in a particular mode of deformation, the applicability of the Bowden and Tabor theory of friction to plastics and other nonmetals becomes more readily understandable. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | The Area of Contact Between Rough Surfaces and Flats | |
type | Journal Paper | |
journal volume | 89 | |
journal issue | 1 | |
journal title | Journal of Tribology | |
identifier doi | 10.1115/1.3616906 | |
journal fristpage | 81 | |
journal lastpage | 87 | |
identifier eissn | 1528-8897 | |
tree | Journal of Tribology:;1967:;volume( 089 ):;issue: 001 | |
contenttype | Fulltext |