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Parametric Studies and Applications of Halbach and Staggered EMATs

Parametric Studies and Applications of Halbach and Staggered EMATs

Date25th Mar 2022

Time03:30 PM

Venue Through Zoom Meet: https://us02web.zoom.us/j/83324568372?pwd=VUp5RzVrdTlFcW1hQ3B5TjU4TmJQZz09

PAST EVENT

Details

Electromagnetic acoustic transducers (EMATs) can influence the formation of distinct guided ultrasonic waves based on their configuration. Apart from the common Periodic Permanent Magnets (PPM) EMAT, studies have also shown that Halbach EMATs can efficiently generate shear horizontal (SH) guided wave modes. The seminar initially introduces an analytical study on the amplitude generation and formation of SH waves from Halbach EMATs. Based on the results of this study, we discuss the numerical and experimental investigation of a novel asymmetrical or staggered EMAT design that mechanically manipulates the propagation direction of shear horizontal (SH) ultrasonic waves. The phenomenon is similar to the beam steering of ultrasonic waves, conventionally performed using PZT based transducers. We then present parametric numerical studies on the influence of multiple design factors on the primary propagation direction of the SH waves produced from double-row staggered PPM EMATs. The seminar concludes with the investigation of potential applications of Staggered EMATs.

Speakers

Mr. Siddharth Shankar (Roll no: ME16D203)

Department of Mechanical Engineering