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Study of interfacial stiffness ratio of a rough surface in contact using a spring model

Gonzalez-Valadez, M., Baltazar, A. and Dwyer-Joyce, R.S. (2010) Study of interfacial stiffness ratio of a rough surface in contact using a spring model. Wear, 268 (3-4). pp. 373-379. ISSN 0043-1648

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This study proposes the use of a simple spring model that relates the interfacial stiffness with the complex reflection coefficient of ultrasound in a rough contact. The spring model cannot be directly related to the real area of contact as this depends on the amount, shape and distribution of contacting asperities. However, it is clear that the model provides a non-destructive tool to easily evaluate both longitudinal and shear interfacial stiffnesses and their ratio. Experimental findings indicate that the interfacial stiffness ratio K-tau/K-sigma determined during loading/unloading cycles is sensitive to the roughness level and load hysteresis. The results deviate from the theoretical available micromechanical models, indicating that actual contacting phenomenon is more complex and other variables needed are not accounted for by the models. (C) 2009 Elsevier B.V. All rights reserved.

Item Type: Article
Copyright, Publisher and Additional Information: © 2010 Elsevier. This is an author produced version of a paper subsequently published in Wear. Uploaded in accordance with the publisher's self-archiving policy.
Keywords: Ultrasound; Rough contact; Interfacial stiffness
Institution: The University of Sheffield
Academic Units: The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Mechanical Engineering (Sheffield)
Depositing User: Miss Anthea Tucker
Date Deposited: 12 Mar 2010 12:02
Last Modified: 08 Feb 2013 17:00
Published Version: http://dx.doi.org/10.1016/j.wear.2009.08.022
Status: Published
Publisher: Elsevier
Refereed: Yes
Identification Number: 10.1016/j.wear.2009.08.022
URI: http://eprints.whiterose.ac.uk/id/eprint/10592

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