EFFECT OF COULOMB-FRICTION AND VISCOUS FORCES ON INTERFACIAL WAVES AT STEEL-STEEL BOUNDARIES UNDER EXTERNAL-PRESSURE

Experimental results for the attenuation and velocity of propagation of interfacial waves along a steel-steel plane interface lubricated with a viscous fluid are presented. The bonding at the interface is varied by the application of an external pressure normal to the interface. These measurements are compared with values predicted by a theoretical model where the shear stress at the interface is assumed to be dependent linearly on the slip in displacement and velocity parallel to the interface. Further, the degree of bonding is assumed to be dependent non-linearly on the external pressure. Agreement between the theoretical model and the experimental data is found to be satisfactory. The implications of these results for testing the adhesion of surfaces are briefly discussed. © 1990.