TY - GEN
T1 - Progress in air-coupled ultrasound
AU - Jayaraman, Subash
AU - Pellkofer, Dominik
AU - Lucas, Ian
AU - Bezdek, Michal
AU - Tittmann, Bernhard
PY - 2007
Y1 - 2007
N2 - A variety of industrial and everyday non-destructive inspection applications exist where the target material/product is inaccessible or, contact with the material is prohibited. In such cases, air-coupled ultrasonic techniques play a major role but commonly significant transmission loss is known to occur. Therefore, it becomes imperative to know the amount of absolute wave mechanical strain achieved in materials embedded in gaseous medium, for certain applications. Thus, the overall objective of this work was to establish simulated results and specific experimental verifications of the numerical modeling, and develop guidelines in the use of matching layers to maximize the wave mechanical strain imparted to materials. A Laser Doppler Vibrometer was used to obtain the displacements/strains induced in the materials. Coupled Acoustic Piezoelectric Analysis (CAPA), coupled field finite element method software was used to perform the simulations. The applications considered in this work include metallic targets inside an enclosed container, food products and also elastomeric composites such as automotive tires.
AB - A variety of industrial and everyday non-destructive inspection applications exist where the target material/product is inaccessible or, contact with the material is prohibited. In such cases, air-coupled ultrasonic techniques play a major role but commonly significant transmission loss is known to occur. Therefore, it becomes imperative to know the amount of absolute wave mechanical strain achieved in materials embedded in gaseous medium, for certain applications. Thus, the overall objective of this work was to establish simulated results and specific experimental verifications of the numerical modeling, and develop guidelines in the use of matching layers to maximize the wave mechanical strain imparted to materials. A Laser Doppler Vibrometer was used to obtain the displacements/strains induced in the materials. Coupled Acoustic Piezoelectric Analysis (CAPA), coupled field finite element method software was used to perform the simulations. The applications considered in this work include metallic targets inside an enclosed container, food products and also elastomeric composites such as automotive tires.
UR - http://www.scopus.com/inward/record.url?scp=35648972653&partnerID=8YFLogxK
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U2 - 10.1117/12.716052
DO - 10.1117/12.716052
M3 - Conference contribution
AN - SCOPUS:35648972653
SN - 0819466522
SN - 9780819466525
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2007
T2 - Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2007
Y2 - 20 March 2007 through 22 March 2007
ER -