EFFECT OF CONTACT VISCOSITY AND ROUGHNESS ON INTERFACE STIFFNESS AND WAVE PROPAGATION

Anil Misra (1) , Orestes Marangos (1)

1 CEAE - Department of Civil, Environmental and Architectural Engineering

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.

Mots clés: Acoustics; Interfaces; Reflection; Transmission; Effective Stiffness

Domaines: Génie mécanique [physics.class-ph]; Génie mécanique [physics.class-ph]

Anil Misra, Orestes Marangos. EFFECT OF CONTACT VISCOSITY AND ROUGHNESS ON INTERFACE STIFFNESS AND WAVE PROPAGATION. 35th Annual Review of Progress in Quantitative Nondestructive Evaluation Univ Chicago, Chicago, Jul 2008, Chicago, United States. pp.105-112. ⟨hal-00555518⟩