On the linear and nonlinear acoustic properties of dry and water-confining elasto-plastic interfaces
2006 (English)In: Proceedings of the Royal Society. Mathematical, Physical and Engineering Sciences, ISSN 1364-5021, E-ISSN 1471-2946, Vol. 462, no 2067, 769-788 p.Article in journal (Refereed) Published
An experimental investigation into the linear reflection and generation of the second harmonic component following the incidence of an ultrasonic wave onto a dry or water-confining interface between elasto-plastic steel-steel surfaces in contact is presented. The results on dry interfaces show that, although the theoretical models currently used to estimate the stiffness of such interfaces constitute a valid framework, the statistics of asperities in contact requires further development to account for the effects of the elasto-plastic deformation. Similarly, the results with water-confining interfaces indicate that current models not accounting for the liquid-mediated forces between the solid surfaces cannot explain the results presented here. In fact, the experimental evidence is interpreted as suggesting that structural repulsive forces may be responsible for the observed phenomena. Finally. the level of second harmonic generation for these interfaces offers support by the development of inspection techniques which exploit such wave phenomena for the detection of partially closed and dry, or nearly open and water-trapping stress-corrosion surface-breaking cracks.
Place, publisher, year, edition, pages
2006. Vol. 462, no 2067, 769-788 p.
confined water, elasto-plastic interface, ultrasonic waves
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-7888DOI: 10.1098/rspa.2005.1595ISI: 000235237800004ScopusID: 2-s2.0-33845543443OAI: oai:DiVA.org:kth-7888DiVA: diva2:13051
QC 201009062008-01-142008-01-142010-12-17Bibliographically approved