Ultrasonic Guided Wave Scattering Matrices and Tomography Using Sparse Arrays for Defect Characterization

2017 ◽  
Author(s):  
Xiang Li ◽  
Wei Guo ◽  
Xunbo Li ◽  
Zhiyong Zhang ◽  
Yejia Liu
Keyword(s):  
Wave Scattering ◽  
Guided Wave ◽  
Defect Characterization ◽  
Sparse Arrays ◽  
Ultrasonic Guided Wave ◽  
Scattering Matrices

Subwavelength Defect Characterization Using Guided Wave Scattering Matrix

2013 ◽  
Vol 330 ◽  
pp. 504-509
Author(s):  
Yang Zheng ◽  
Jin Jie Zhou ◽  
Hui Zheng
Keyword(s):  
Wave Scattering ◽  
Scattering Matrix ◽  
Guided Wave ◽  
Defect Characterization ◽  
Challenging Problem ◽  
Recognition Method ◽  
Quantitative Characterization ◽  
S Matrix ◽  
Imaging Algorithms

Although many imaging algorithms such as ellipse and hyperbola algorithm can roughly locate defects in large plate-like structures with sparse guided wave arrays, quantitative characterization of them is still a challenging problem, especially for those small defects known as subwavelength defects. Scattering signals of defects contain abundant information so that can be used to evaluate defects. A defects recognition method using the S-matrix (scattering matrix) was presented. S-matrices of hole and crack with S0 mode incident were experimentally measured. The results show that defects can be recognized from the morphology of 2D S-matrix chart. This method has great potential to achieve more specific parameters of small defects with sparse guided wave arrays.

Ultrasonic guided wave scattering due to delamination in curved composite structures

2020 ◽  
Vol 239 ◽  
pp. 111987 ◽  
Author(s):  
Rajendra Kumar Munian ◽  
D. Roy Mahapatra ◽  
S. Gopalakrishnan
Keyword(s):  
Wave Scattering ◽  
Composite Structures ◽  
Guided Wave ◽  
Ultrasonic Guided Wave

Ultrasonic guided wave scattering in a plate overlap

2005 ◽  
Vol 52 (5) ◽  
pp. 892-903 ◽  
Author(s):  
W.-J. Song ◽  
J.L. Rose ◽  
J.M. Galan ◽  
R. Abascal
Keyword(s):  
Wave Scattering ◽  
Guided Wave ◽  
Ultrasonic Guided Wave
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