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Time reversal and non-linear elastic wave spectroscopy (TR NEWS) techniques |
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| Authors: | TJ Ulrich AM Sutin PA Johnson |
| Institution: | a Geophysics Group, Los Alamos National Laboratory, Los Alamos, NM 87545, USA b Department of Physics, Stevens Institute of Technology, Hoboken, NJ, USA c Department of Physics, University of Nevada, Reno, NV 89557, USA |
| 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. |
| Keywords: | 43 60 Tj 43 25 Dc 43 40 Le 43 40 Fz |
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