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

✍ Scribed by M. Gonzalez-Valadez; A. Baltazar; R.S. Dwyer-Joyce

Publisher: Elsevier Science
Year: 2010
Tongue: English
Weight: 921 KB
Volume: 268
Category: Article
ISSN: 0043-1648
DOI: 10.1016/j.wear.2009.08.022

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✦ Synopsis

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 /K 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.

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