Probing materials damage at various depths by use of Time Reversal Elastic Nonlinearity Diagnostic: Application to concrete

C Payan , T.J. Ulrich , Pierre-Yves Le Bas (1) , M. Guimaraes

1 LANL - Los Alamos National Laboratory

Time Reversal Elastic Nonlinearity Diagnostic (TREND) is based on the use of time reversal to focus energy at a prescribed location. This focused elastic wave energy is then analyzed for nonlinear frequency content. By varying the frequency content of the focused waveforms, the technique can be used to probe different depths relative to the surface, i.e., the TREND will probe the surface and penetrate to a depth defined by the wavelength of the focused waves. We show the validity of this concept by comparing the results obtained from nonlinear resonant ultrasound spectroscopy and the present results in the presence of homogeneously diffused damage in concrete.

Mots clés: Time Reversal; Damage; Nonlinear Acoustics; Concrete

Domaines: Acoustique [physics.class-ph]

C Payan, T.J. Ulrich, Pierre-Yves Le Bas, M. Guimaraes. Probing materials damage at various depths by use of Time Reversal Elastic Nonlinearity Diagnostic: Application to concrete. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810940⟩