The Use of Ultrasound in the Investigation of Rough Surface Interfaces
Author:
Dwyer-Joyce R. S.1, Drinkwater B. W.2, Quinn A. M.2
Affiliation:
1. Department of Mechanical Engineering, University of Sheffield, Mappin Street, Sheffield, S1 3JD England 2. Department of Mechanical Engineering, Queens Building, University of Bristol, Bristol, BS8 1TR England
Abstract
The measurement of ultrasonic reflection has been used to study the contact between rough surfaces. An incomplete interface will reflect some proportion of an incident wave; this proportion is known as the reflection coefficient. If the wavelength is large compared with the width of the gaps in the plane of the interface then the reflection mechanism can be modeled by considering the interface as a spring. The proportion of the incident wave reflected (reflection coefficient) is then a function of the stiffness of the interface and the frequency of the ultrasonic wave. The sensitivity of the ultrasonic technique has been quantified using a simple model, from which the stiffness of individual gaps and contacts are calculated and their effect on the ultrasonically measured stiffness predicted. The reflection of ultrasound at a static interface between a rough, nominally flat aluminum plate and a rough, nominally flat hardened steel punch has been investigated. Plastic flow on first loading was evident, while repeated loading was largely elastic. However, subsequent cycles indicate a small amount of further plasticity and contact irreversibility. The effect of surface roughness on the resultant contact has also been investigated. A simple plastic contact model is described which allows prediction of the average size of the asperity contacts and their number. This model shows that the average size of the contacts remains constant over most of the loading whereas the number of contacts increases almost linearly. The contact stiffness has also been modeled with two well known elastic rough surface contact models. These models predicted a lower interface stiffness than was observed in the experiments. However they provide a useful way of interpreting the ultrasonically measured interface stiffness data.
Publisher
ASME International
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials
Reference26 articles.
1. Tattersall, H. G.
, 1973, “The Ultrasonic Pulse-Echo Technique as Applied to Adhesion Testing,” J. Appl. Phys., J. Phys. D, D6, pp. 819–832. 2. Kendall, K., and Tabor, D., 1971, “An Ultrasonic Study of the Area of Contact Between Stationary and Sliding Surfaces,” Proc. R. Soc. London, Ser. A, 323, pp. 321–340. 3. Krolikowski, J., Szczepek, J., and Witczak, Z., 1989, “Ultrasonic Investigation of Contact Between Solids Under High Hydrostatic Pressure,” Ultrasonics, 27, pp. 45–49. 4. Krolikowski, J., and Szczepek, J., 1991, “Prediction of Contact Parameters Using Ultrasonic Method,” Wear, 148, pp. 181–195. 5. Baik, J.-M., and Thompson, R. B., 1984, “Ultrasonic Scattering from Imperfect Interfaces: A Quasi-Static Model,” J. Nondestruct. Eval., 4, No. 3/4, pp. 177–196.
Cited by
112 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献
|
|