Linear elastic contact of the Weierstrass profile

Abstract

Restricted accessMoreSectionsView PDF ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmail Cite this article Ciavarella M., Demelio G., Barber J. R. and Jang Yong Hoon 2000Linear elastic contact of the Weierstrass profile†Proc. R. Soc. Lond. A.456387–405http://doi.org/10.1098/rspa.2000.0522SectionRestricted accessLinear elastic contact of the Weierstrass profile† M. Ciavarella M. Ciavarella Department of Mechanical Engineering, University of Southampton, Highfield, Southampton SO17 1BJ, UK Google Scholar Find this author on PubMed Search for more papers by this author , G. Demelio G. Demelio Dipartimento di Progettazione e Produzione Industriale, Politecnico di Bari, Viale Japigia 182, 70126 Bari, Italy Google Scholar Find this author on PubMed Search for more papers by this author , J. R. Barber J. R. Barber Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, MI 48109–2125, USA Google Scholar Find this author on PubMed Search for more papers by this author and Yong Hoon Jang Yong Hoon Jang Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, MI 48109–2125, USA Google Scholar Find this author on PubMed Search for more papers by this author M. Ciavarella M. Ciavarella Department of Mechanical Engineering, University of Southampton, Highfield, Southampton SO17 1BJ, UK Google Scholar Find this author on PubMed Search for more papers by this author , G. Demelio G. Demelio Dipartimento di Progettazione e Produzione Industriale, Politecnico di Bari, Viale Japigia 182, 70126 Bari, Italy Google Scholar Find this author on PubMed Search for more papers by this author , J. R. Barber J. R. Barber Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, MI 48109–2125, USA Google Scholar Find this author on PubMed Search for more papers by this author and Yong Hoon Jang Yong Hoon Jang Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, MI 48109–2125, USA Google Scholar Find this author on PubMed Search for more papers by this author Published:08 February 2000https://doi.org/10.1098/rspa.2000.0522AbstractA contact problem is considered in which an elastic half–plane is pressed against a rigid fractally rough surface, whose profile is defined by a Weierstrass series. It is shown that no applied mean pressure is sufficiently large to ensure full contact and indeed there are not even any contact areas of finite dimension — the contact area consists of a set of fractal character for all values of the geometric and loading parameters.A solution for the partial contact of a sinusoidal surface is used to develop a relation between the contact pressure distribution at scale n − 1 and that at scale n. Recursive numerical integration of this relation yields the contact area as a function of scale. An analytical solution to the same problem appropriate at large n is constructed following a technique due to Archard. This is found to give a very good approximation to the numerical results even at small n, except for cases where the dimensionless applied load is large.The contact area is found to decrease continuously with n, tending to a power–law behaviour at large n which corresponds to a limiting fractal dimension of (2 − D), where D is the fractal dimension of the surface profile. However, it is not a ‘simple’ fractal, in the sense that it deviates from the power–law form at low n, at which there is also a dependence on the applied load. Contact segment lengths become smaller at small scales, but an appropriately normalized size distribution tends to a limiting function at large n.†The authors dedicate this paper to the memory of Dr J. F. Archard, 1918–1989. 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