Abstract

GONZALEZ VALADEZ, Miguel  and  DWYER-JOYCE, Rob S.. On the Interface Stiffness in Rough Contacts Using Ultrasonic Waves. Ingenier. mecáni. tecnolog. desarroll [online]. 2008, vol.3, n.1, pp.29-36. ISSN 1665-7381.

The 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 can not be readily 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 is a powerful non destructive tool to evaluate in an easier way both longitudinal and shear interfacial stiffnesses and its ratio. The experimental findings agree well with some theoretical predictions evaluated previously and also corroborate the ultrasonic results found in other studies.

Keywords : Rough contact; interfacial stiffness; Poisson's ratio; ultrasonic.