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Time reversal and non-linear elastic wave spectroscopy (TR NEWS) techniques

Authors
Journal
International Journal of Non-Linear Mechanics
0020-7462
Publisher
Elsevier
Publication Date
Volume
43
Issue
3
Identifiers
DOI: 10.1016/j.ijnonlinmec.2007.12.017
Keywords
  • Time Reversed Acoustics
  • Non-Linear Elasticity
  • Non-Destructive Evaluation
  • Crack Characterization

Abstract

Abstract Non-linear elastic wave spectroscopy (NEWS) has been shown to exhibit a high degree of sensitivity to both distributed and isolated non-linear scatterers in solids. In the case of an isolated non-linear scatterer such as a crack, by combining the elastic energy localization of time reversal (TR) with NEWS, it is shown that one can isolate non-linear scatterers in solids. The experiments reviewed here present two distinct methods of combining TR and NEWS for this purpose. The techniques each have there own advantages and disadvantages, with respect to each other and other non-linear methods, which are discussed.

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