• NAVEEN KISHORE P
• SOMASEKHAR T
• PHANI SOWJANYA

Non Destructive testing is a wide group of analysis techniques used in science and industry to evaluate the properties of a material components or system without causing damage. NDT methods include visual inspection, dye penetrant method, radiographic method, magnetic particle method, eddy current testing method, ultrasonic testing method. Acousto-Ultrasonics is also one of the NDT methods which can overcome most of the disadvantages of other methods. The term ―acousto-ultrasonics denotes a combination of some aspects of acoustic emission methodology with ultrasonic characterization. In acousto-ultrasonic technique, a broadband ultrasonic wave is injected onto the surface at one location of the test plate with the help of a piezoelectric sensor coupled to the same surface at another location. Thus, understanding the propagation characteristics of the ultrasonic wave is essential for successful application of the technique. The dominant acousto-ultrasonics waves produced experimentally in thin plates were multi-mode Lamb waves. The broadband generation and detection of Lamb waves has been performed in aluminium plate using the acousto-ultrasonic method. Using the same procedure, experiments are conducted on non-defective and defective plates with transducers of different frequencies. By comparing the results obtained in both the cases, defects can be detected. Similar plots can be obtained with the transducers of different frequencies.

Lamb wave, Piezoelectric sensor, Transducers

"EXPERIMENTAL STUDY OF LAMB WAVES USING ACOUSTO-ULTRASONIC TECHNIQUE ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 4, page no.660-664, April-2020, Available :http://www.jetir.org/papers/JETIR2004095.pdf

"EXPERIMENTAL STUDY OF LAMB WAVES USING ACOUSTO-ULTRASONIC TECHNIQUE ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 4, page no. pp660-664, April-2020, Available at : http://www.jetir.org/papers/JETIR2004095.pdf