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Cyclic Micro-slip and Energy Dissipation on Elastic Rough Interfaces

Borri Brunetto, Mauro and Invernizzi, Stefano and Paggi, Marco and Carpinteri, Alberto Cyclic Micro-slip and Energy Dissipation on Elastic Rough Interfaces. In: AIMETA 2005 : atti del XVII Congresso dell’Associazione italiana di meccanica teorica e applicata : Firenze, 11-15 settembre 2005. Firenze University Press. ISBN 88-8453-313-9 (2005)

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A generalized approach is proposed, following the Mindlin and Deresiewicz procedure, to study the cyclic behavior of surfaces in contact under a small oscillating tangential force. In order to make the procedure straightforward and as general as possible, a non-dimensional formulation, based only on the normal contact load-displacement curve, has been provided. It turns out that the non-dimensional behavior under normal or tangential loading, as well as the energy dissipation involved in cyclic loading, strongly depends on the exponent α . This exponent can be calculated explicitly in the case of profiles described by mathematical expressions (e.g. cylinders and spheres), or can be determined from best fitting of experimental or numerical data (e.g. from ICARUS simulations). The larger is the exponent α , the larger is the energy dissipated in small amplitude (partialslip) tangential cycles. Moreover, a comparison has been provided, without any claims of completeness, among some of the theoretical models for the tangential interaction of rough surfaces available in the literature. The calculation of the exponent α allows us to show the influence of different statistical distribution assumptions of surface heights on the hysteretic energy dissipation. Finally, the stick-slip behavior of rough surfaces subjected to oscillating loads has been interpreted in terms of an analogy with the shake-down phenomenon described by the theory of plasticity.

Item Type: Book Section
Additional Information: 17th AIMETA Congress of Theoretical and Applied Mechanics, Firenze, Italy, September 11-15, 2005
Uncontrolled Keywords: cyclic tangential contact, rough interfaces, fractals
Subjects: T Technology > TJ Mechanical engineering and machinery
Research Area: Computer Science and Applications
Depositing User: Prof Marco Paggi
Date Deposited: 22 Nov 2013 12:07
Last Modified: 09 Oct 2014 09:20
URI: http://eprints.imtlucca.it/id/eprint/1933

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