Ultrasonic arrays for non-destructive evaluation: A review

2006 ◽  
Vol 39 (7) ◽  
pp. 525-541 ◽  
Author(s):  
Bruce W. Drinkwater ◽  
Paul D. Wilcox
Keyword(s):  
Non Destructive Evaluation ◽  
Ultrasonic Arrays ◽  
Non Destructive

scholarly journals Optimizing the focal laws of ultrasonic arrays for non-destructive evaluation of composite panels with delamination

2018 ◽  
Vol 191 ◽  
pp. 00001
Author(s):  
Mariam Achbal ◽  
Abdellatif Khamlichi ◽  
Fadoua El Khannoussi
Keyword(s):  
Composite Panel ◽  
Single Element ◽  
Specific Sequence ◽  
Non Destructive Evaluation ◽  
Focal Position ◽  
Dimensional Approximation ◽  
Ultrasonic Array ◽  
Ultrasonic Arrays ◽  
Incident Waves ◽  
Non Destructive

The use of ultrasonic arrays in the field of non-destructive evaluation of composites is a recent technique. This method offers the possibility to achieve fast inspection of components having complex geometries. As compared with the single element transducers, arrays configuration yields more effective detection of defects. However, to achieve adequate imaging by ultrasonic array elements, each element should be excited according to a specific sequence which is called the focal law. At each instant a subset of the array elements is activated and the incident waves are better directed to scattered at the defect. The reflected signals can then be more intensified. In this work, two-dimensional approximation of wave propagation problem was supposed. Array elements with linear geometry and with the elements assumed to be fully coupled with the composite panel were considered. A delamination defect was inserted between the plies of the composite panel at a given depth. The forward model enabling to simulate ultrasonic array data was built by means of the FEM. As each focal position requires a different focal law that fixes a proper protocol of excitation and reception, synthesis of these focal laws was studied. Optimization of signal focalization and reception as function of the delamination extent was achieved.

Non destructive evaluation of concrete contamination by chloride. Comparison of methods

2011 ◽  
Vol 15 (7) ◽  
pp. 1073-1084
Author(s):  
Jean-Paul Balayssac ◽  
Stéphane Laurent ◽  
Gilles Klysz ◽  
Jean-François Lataste ◽  
Xavier Derobert
Keyword(s):  
Comparison Of Methods ◽  
Non Destructive Evaluation ◽  
Non Destructive
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