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Title: Probing material nonlinearity at various depths by time reversal mirrors

In this Letter, the time reversal mirror is used to focus elastic energy at a prescribed location and to analyze the amplitude dependence of the focus signal, thus providing the nonlinearity of the medium. By varying the frequency content of the focused waveforms, the technique can be used to probe the surface, by penetrating to a depth defined by the wavelength of the focused waves. The validity of this concept is shown in the presence of gradual and distributed damage in concrete by comparing actual results with a reference nonlinear measurement and X ray tomography images.
Authors:
 [1] ; ; ;  [2] ; ;  [3] ;  [4]
  1. LMA UPR CNRS 7051, Aix Marseille Université, 31 Chemin Joseph Aiguier, 13402 Marseille (France)
  2. Los Alamos National Laboratory, EES-17, Los Alamos, New Mexico 87545 (United States)
  3. Swiss Federal Laboratories for Materials Science and Technology (EMPA), Überlandstrasse 129, 8600 Dübendorf (Switzerland)
  4. Los Alamos National Laboratory, MST-16, Los Alamos, New Mexico 87545 (United States)
Publication Date:
OSTI Identifier:
22261573
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 14; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 36 MATERIALS SCIENCE; COMPARATIVE EVALUATIONS; CONCRETES; MIRRORS; NONLINEAR PROBLEMS