The effects of transducers on the time reversal process in solids

2008 ◽  
Vol 123 (5) ◽  
pp. 3184-3184
Author(s):  
Brian E. Anderson ◽  
Michele Griffa ◽  
Paul A. Johnson
Keyword(s):  
Time Reversal ◽  
Reversal Process

The stability of the time‐reversal process in a fluctuating ocean

2003 ◽  
Vol 114 (4) ◽  
pp. 2402-2402
Author(s):  
G. F. Edelmann ◽  
S. Kim ◽  
W. S. Hodgkiss ◽  
W. A. Kuperman ◽  
H. C. Song
Keyword(s):  
Time Reversal ◽  
Reversal Process ◽  
The Stability

Tangible interactive interface using acoustic time reversal process

2005 ◽  
Vol 117 (4) ◽  
pp. 2560-2560 ◽  
Author(s):  
Ros K. Ing ◽  
Nicolas Quieffin ◽  
Stefan Catheline ◽  
Mathias Fink
Keyword(s):  
Time Reversal ◽  
Interactive Interface ◽  
Reversal Process

Detection of damage in CFRP Laminates by Time Reversal Process Method

2017 ◽  
Vol 2017.66 (0) ◽  
pp. 223
Author(s):  
Tsuyoshi KOBAYASHI ◽  
Yasuhisa HAYASHI ◽  
Yasuhisa HAYASHI
Keyword(s):  
Time Reversal ◽  
Cfrp Laminates ◽  
Reversal Process ◽  
Process Method

Single Transducer Pair Lamb Wave Time Reversal for Damage Detection in Composite Laminates

2013 ◽  
Vol 558 ◽  
pp. 205-217 ◽  
Author(s):  
Benjamin Normandin ◽  
Martin Veidt
Keyword(s):  
Time Reversal ◽  
Composite Laminates ◽  
Lamb Waves ◽  
Experimental Studies ◽  
Similarity Index ◽  
Time Reversibility ◽  
Element Analysis ◽  
Explicit Finite Element ◽  
Reversal Process ◽  
Damage Diagnostics

This paper investigates the potential of single transducer pair guided waves time reversal to detect damage in composite laminates. According to dynamic reciprocity of Lamb waves propagation in linear media, the time reversal process should reconstruct the original signal. The similarity of original and reconstructed time signals is calculated for different damage types using numerical and experimental studies with the aim to investigate, if the interaction of the wave pulse with inhomogeneities introduces any nonlinearity that time reversibility breaks down and single transducer pair time reversal could be used as damage diagnostics tool. 3D explicit finite element analysis is used for the numerical simulation and laser Doppler vibrometry is used to capture out-of-plane displacement time histories excited by an adhesively bonded piezoceramic transducer disc in the experimental time reversal process. In the case of an undamaged composite laminate the similarity index used to quantify the similarity of the original and reconstructed wave pulses is better than 95%. The similarity index is smaller for laminates with artificial damages including embedded fluoro polymer films to simulate delamination damage, through holes and bonded mass inhomogeneities. Although numerical and experimental similarity indices are smaller at higher frequencies, there is no clear evidence that single transducer pair time reversibility breaks down and represents a reliable damage diagnostics tool.

In solid localization of finger impacts using acoustic time-reversal process

2005 ◽  
Vol 87 (20) ◽  
pp. 204104 ◽  
Author(s):  
Ros Kiri Ing ◽  
Nicolas Quieffin ◽  
Stefan Catheline ◽  
Mathias Fink
Keyword(s):  
Time Reversal ◽  
Reversal Process
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