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Proceedings Paper

Evaluation of cylindrical Hertzian contact using guided waves
Author(s): Nohyu Kim; Seungyong Yang
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Paper Abstract

This paper presents an ultrasonic method to evaluate the contact state of two solid boundaries using guided wave propagating between the joining surfaces. The main idea is that the guided wave travels with different wave velocity depending on the contact pressure of interface. Mathematical formulation for acoustic wave propagation at contacting solids was made to obtain the dispersive relation between acoustic wave and contact pressure. Three different kinds of steel block with cylindrical tip were machined and pressed together at various compression loads to form contact surfaces of different contacting condition. Guided wave reflected at the edge of the steel block was measured to determine wave speed using the time-of-flight, which increases sensitively with the load. Experimental results proved that contact states such as contact force and interfacial stiffness between two solid surfaces can be monitored by the acoustic wave speed of guided wave in the interface.

Paper Details

Date Published: 18 April 2012
PDF: 6 pages
Proc. SPIE 8348, Health Monitoring of Structural and Biological Systems 2012, 83480Q (18 April 2012); doi: 10.1117/12.915363
Show Author Affiliations
Nohyu Kim, Korea Univ. of Technology and Education (Korea, Republic of)
Seungyong Yang, Korea Univ. of Technology and Education (Korea, Republic of)

Published in SPIE Proceedings Vol. 8348:
Health Monitoring of Structural and Biological Systems 2012
Tribikram Kundu, Editor(s)

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