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Method for Monitoring Slow Dynamics Recovery
Blekinge Institute of Technology, School of Engineering, Department of Mechanical Engineering.
2012 (English)In: Acoustical Physics, ISSN 1063-7710, E-ISSN 1562-6865, Vol. 58, no 3, 713-717 p.Article in journal (Refereed) Published
Abstract [en]

Slow Dynamics is a specific material property, which for example is connected to the degree of damage. It is therefore of importance to be able to attain proper measurements of it. Usually it has been monitored by acoustic resonance methods which have very high sensitivity as such. However, because the acoustic wave is acting both as conditioner and as probe, the measurement is affecting the result which leads to a mixing of the fast nonlinear response to the excitation and the slow dynamics material recovery. In this article a method is introduced which, for the first time, removes the fast dynamics from the process and allows the behavior of the slow dynamics to be monitored by itself. The new method has the ability to measure at the shortest possible recovery times, and at very small conditioning strains. For the lowest strains the sound speed increases with strain, while at higher strains a linear decreasing dependence is observed. This is the first method and test that has been able to monitor the true material state recovery process.

Place, publisher, year, edition, pages
SP MAIK Nauka/Interperiodica , 2012. Vol. 58, no 3, 713-717 p.
Keyword [en]
material properties, acoustical monitoring, slow dynamics material recovery
National Category
Fluid Mechanics and Acoustics Applied Mechanics
URN: urn:nbn:se:bth-6923DOI: 10.1134/S1063771012060061Local ID: diva2:834478
Available from: 2013-07-10 Created: 2013-06-27 Last updated: 2016-09-01Bibliographically approved

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Hedberg, Claes
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