Numerical parametric study of Nonlinear Coda Wave Interferometry sensitivity to microcrack size in a multiple scattering medium

Ultrasonics ◽  
2021 ◽  
pp. 106483
Author(s):  
Guangzhi Chen ◽  
Yuxiang Zhang ◽  
Odile Abraham ◽  
Damien Pageot ◽  
Mathieu Chekroun ◽  
...  
Keyword(s):  
Multiple Scattering ◽  
Parametric Study ◽  
Coda Wave ◽  
Scattering Medium ◽  
Numerical Parametric Study ◽  
Coda Wave Interferometry

scholarly journals Numerical modeling of nonlinear modulation of coda wave interferometry in a multiple scattering medium with the presence of a localized micro-cracked zone

2018 ◽  
Author(s):  
Guangzhi Chen ◽  
Damien Pageot ◽  
Jean-Baptiste Legland ◽  
Odile Abraham ◽  
Mathieu Chekroun ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Multiple Scattering ◽  
Coda Wave ◽  
Scattering Medium ◽  
Nonlinear Modulation ◽  
Coda Wave Interferometry

Numerical modeling of ultrasonic coda wave interferometry in a multiple scattering medium with a localized nonlinear defect

Wave Motion ◽  
2017 ◽  
Vol 72 ◽  
pp. 228-243 ◽  
Author(s):  
Guangzhi Chen ◽  
Damien Pageot ◽  
Jean-Baptiste Legland ◽  
Odile Abraham ◽  
Mathieu Chekroun ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Multiple Scattering ◽  
Coda Wave ◽  
Scattering Medium ◽  
Coda Wave Interferometry

Monitoring medium changes in an intraplate setting with coda wave interferometry

2013 ◽  
Author(s):  
Virginie D'Hour ◽  
Aderson F. do Nascimento ◽  
Heleno C. de Lima Neto ◽  
Joaquim M. Ferreira ◽  
Martin Schimmel
Keyword(s):  
Coda Wave ◽  
Coda Wave Interferometry

scholarly journals Sensitivity of Ultrasonic Coda Wave Interferometry to Material Damage—Observations from a Virtual Concrete Lab

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4033
Author(s):  
Claudia Finger ◽  
Leslie Saydak ◽  
Giao Vu ◽  
Jithender J. Timothy ◽  
Günther Meschke ◽  
...  
Keyword(s):  
Elastic Moduli ◽  
Concrete Specimen ◽  
Coda Wave ◽  
Velocity Change ◽  
Damage Scenarios ◽  
Different Types ◽  
Source Signal ◽  
The Impact ◽  
Structural Scale ◽  
Coda Wave Interferometry

Ultrasonic measurements are used in civil engineering for structural health monitoring of concrete infrastructures. The late portion of the ultrasonic wavefield, the coda, is sensitive to small changes in the elastic moduli of the material. Coda Wave Interferometry (CWI) correlates these small changes in the coda with the wavefield recorded in intact, or unperturbed, concrete specimen to reveal the amount of velocity change that occurred. CWI has the potential to detect localized damages and global velocity reductions alike. In this study, the sensitivity of CWI to different types of concrete mesostructures and their damage levels is investigated numerically. Realistic numerical concrete models of concrete specimen are generated, and damage evolution is simulated using the discrete element method. In the virtual concrete lab, the simulated ultrasonic wavefield is propagated from one transducer using a realistic source signal and recorded at a second transducer. Different damage scenarios reveal a different slope in the decorrelation of waveforms with the observed reduction in velocities in the material. Finally, the impact and possible generalizations of the findings are discussed, and recommendations are given for a potential application of CWI in concrete at structural scale.

scholarly journals Frequency selection for coda wave interferometry in concrete structures

Ultrasonics ◽  
2017 ◽  
Vol 80 ◽  
pp. 1-8 ◽  
Author(s):  
Patrik Fröjd ◽  
Peter Ulriksen
Keyword(s):  
Concrete Structures ◽  
Coda Wave ◽  
Frequency Selection ◽  
Selection For ◽  
Coda Wave Interferometry
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