Damage detection in composites using the time‐reversal acoustics method

2004 ◽  
Vol 116 (4) ◽  
pp. 2567-2567 ◽  
Author(s):  
Alexander Sutin ◽  
Eric Roides ◽  
Armen Sarvazyan
Keyword(s):  
Damage Detection ◽  
Time Reversal ◽  
Time Reversal Acoustics

scholarly journals Pressure sensitivity kernels applied to time-reversal acoustics

2008 ◽  
Vol 124 (1) ◽  
pp. 98-112 ◽  
Author(s):  
Kaustubha Raghukumar ◽  
Bruce D. Cornuelle ◽  
William S. Hodgkiss ◽  
William A. Kuperman
Keyword(s):  
Time Reversal ◽  
Pressure Sensitivity ◽  
Time Reversal Acoustics

scholarly journals An Efficient Time Reversal Method for Lamb Wave-Based Baseline-Free Damage Detection in Composite Laminates

2018 ◽  
Vol 9 (1) ◽  
pp. 11 ◽  
Author(s):  
Liping Huang ◽  
Junmin Du ◽  
Feiyu Chen ◽  
Liang Zeng
Keyword(s):  
Damage Detection ◽  
Time Reversal ◽  
Lamb Wave ◽  
Composite Laminates ◽  
Narrow Band ◽  
Great Influence ◽  
Time Intervals ◽  
Wide Range ◽  
Reconstructed Signal ◽  
Short Time

Time reversal (TR) concept is widely used for Lamb wave-based damage detection. However, the time reversal process (TRP) faces the challenge that it requires two actuating-sensing steps and requires the extraction of re-emitted and reconstructed waveforms. In this study, the effects of the two extracted components on the performance of TRP are studied experimentally. The results show that the two time intervals, in which the waveforms are extracted, have great influence on the accuracy of damage detection of the time reversal method (TRM). What is more, it requires a large number of experiments to determine these two time intervals. Therefore, this paper proposed an efficient time reversal method (ETRM). Firstly, a broadband excitation is applied to obtain response at a wide range of frequencies, and ridge reconstruction based on inverse short-time Fourier transform is applied to extract desired mode components from the broadband response. Subsequently, deconvolution is used to extract narrow-band reconstructed signal. In this method, the reconstructed signal can be easily obtained without determining the two time intervals. Besides, the reconstructed signals related to a series of different excitations could be obtained through only one actuating-sensing step. Finally, the effectiveness of the ETRM for damage detection in composite laminates is verified through experiments.

Flexible tools for time reversal acoustics focusing applications

2007 ◽  
Vol 122 (5) ◽  
pp. 3009
Author(s):  
Laurent Fillinger ◽  
Viktors Kurtenoks ◽  
Sam Rosenblum ◽  
Alexander Sutin ◽  
Armen Sarvazyan
Keyword(s):  
Time Reversal ◽  
Time Reversal Acoustics

Robust diagnosis for the focal stability in time‐reversal acoustics

2000 ◽  
Vol 108 (5) ◽  
pp. 2606-2606
Author(s):  
H. C. Song ◽  
W. A. Kuperman ◽  
T. Akal ◽  
W. S. Hodgkiss ◽  
S. Kim ◽  
...  
Keyword(s):  
Time Reversal ◽  
Time Reversal Acoustics

Selective source reduction to identify masked sources using time reversal acoustics

2008 ◽  
Vol 41 (15) ◽  
pp. 155504 ◽  
Author(s):  
M Scalerandi ◽  
A S Gliozzi ◽  
Brian E Anderson ◽  
M Griffa ◽  
Paul A Johnson ◽  
...  
Keyword(s):  
Time Reversal ◽  
Source Reduction ◽  
Time Reversal Acoustics

scholarly journals A single-sided homogeneous Green's function representation for holographic imaging, inverse scattering, time-reversal acoustics and interferometric Green's function retrieval

2016 ◽  
Vol 205 (1) ◽  
pp. 531-535 ◽  
Author(s):  
Kees Wapenaar ◽  
Jan Thorbecke ◽  
Joost van der Neut
Keyword(s):  
Green’S Function ◽  
Inverse Scattering ◽  
Green's Function ◽  
Time Reversal ◽  
Boundary Integral ◽  
Open Surface ◽  
Function Representation ◽  
Holographic Imaging ◽  
Scattering Time ◽  
Time Reversal Acoustics

Abstract Green's theorem plays a fundamental role in a diverse range of wavefield imaging applications, such as holographic imaging, inverse scattering, time-reversal acoustics and interferometric Green's function retrieval. In many of those applications, the homogeneous Green's function (i.e. the Green's function of the wave equation without a singularity on the right-hand side) is represented by a closed boundary integral. In practical applications, sources and/or receivers are usually present only on an open surface, which implies that a significant part of the closed boundary integral is by necessity ignored. Here we derive a homogeneous Green's function representation for the common situation that sources and/or receivers are present on an open surface only. We modify the integrand in such a way that it vanishes on the part of the boundary where no sources and receivers are present. As a consequence, the remaining integral along the open surface is an accurate single-sided representation of the homogeneous Green's function. This single-sided representation accounts for all orders of multiple scattering. The new representation significantly improves the aforementioned wavefield imaging applications, particularly in situations where the first-order scattering approximation breaks down.

Acoustic communications in an enclosure using single-channel time-reversal acoustics

2002 ◽  
Vol 80 (4) ◽  
pp. 694-696 ◽  
Author(s):  
M. G. Heinemann ◽  
A. Larraza ◽  
K. B. Smith
Keyword(s):  
Time Reversal ◽  
Single Channel ◽  
Acoustic Communications ◽  
Time Reversal Acoustics
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