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Title: Effect of contact viscosity and roughness on interface stiffness and wave propagation
Authors: Marangos, Orestes 
Misra, Anil S.
Keywords: Acoustics;Effective stiffness;Interfaces;Reflection;Transmission
Category: Civil Engineering
Field: Engineering and Technology
Issue Date: 5-May-2009
Source: Review of Progress in Quantitative Nondestructive Evaluation; Chicago, IL; United States; 20 July 2008 through 25 July 2008
Conference: Review of Progress in Quantitative Nondestructive Evaluation 
Abstract: The authors have developed a micromechanical methodology for modeling contact behavior of rough solids. This methodology has been applied to determine complex- valued effective normal and shear stiffnesses of interfaces by considering surface roughness, and viscous asperity contact force laws. In this work, the micromechanically derived complex effective stiffnesses are used in conjunction with the imperfectly bonded interface model to perform a parametric study by varying surface roughness, contact viscosities, and frequency of the incident wave. We find that the surface roughness and asperity properties compete in determining the stiffness behavior, and consequently, the wave propagation behavior of rough interfaces. © 2009 American Institute of Physics.
ISSN: 0094243X
DOI: 10.1063/1.3114071
Type: Conference Papers
Appears in Collections:Δημοσιεύσεις σε συνέδρια/Conference papers

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