Siddharth Shankar
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Siddharth Shankar has a total of 2 co-authors. Here are the top co-authors by number of shared publications:
Krishnan Balasubramaniam
1 shared publication- Krishnan Balasubramaniam
Centre for Non-Destructive Evaluation, Indian Institute of Technology Madras, Chennai 600036, India
1 shared publication
Latest Publications
- 1 July 2021
- Published by Elsevier in NDT & E International
- Vol. 121
Characterising the beam formation of SH waves using double-row Staggered Halbach EMAT configurations
- 1 July 2021
- Published by Elsevier in NDT & E International
- Vol. 121
Characterising the beam formation of SH waves using double-row Staggered Halbach EMAT configurations
- 6 January 2021
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
- Vol. 68 (5) , 1866-1875
Characterizing Halbach EMAT Configurations for SH0 Ultrasonic Waves
EMATs can efficiently generate the shear horizontal (SH) guided wave modes. In this paper, the Halbach magnet array pattern is explored as an alternate to the conventional Periodic Permanent Magnet (PPM) structure. The magnetic field strength of a Halbach array is significantly higher on one side of the structure while it is weak on the opposite side of the array. This magnetic field distribution enables Halbach EMATs to generate ultrasonic waves with relatively large amplitude. To observe this phenomenon, this study compares the amplitude generated from multiple single-row Halbach EMATs with single-row PPM EMAT configurations using Finite Element based simulation models for SH0 ultrasonic wave generation. The paper then presents the ultrasonic wave fields generated by various double-row Halbach EMAT configurations using Finite Element based simulation models and experimentally validated for guided fundamental SH0 mode generated in an Aluminum plate specimen. It is observed that distinct ultrasonic guided wave beam patterns be associated and predicted for different double-row Halbach EMAT configurations.
- 6 January 2021
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
- Vol. 68 (5) , 1866-1875
Characterizing Halbach EMAT Configurations for SH0 Ultrasonic Waves
EMATs can efficiently generate the shear horizontal (SH) guided wave modes. In this paper, the Halbach magnet array pattern is explored as an alternate to the conventional Periodic Permanent Magnet (PPM) structure. The magnetic field strength of a Halbach array is significantly higher on one side of the structure while it is weak on the opposite side of the array. This magnetic field distribution enables Halbach EMATs to generate ultrasonic waves with relatively large amplitude. To observe this phenomenon, this study compares the amplitude generated from multiple single-row Halbach EMATs with single-row PPM EMAT configurations using Finite Element based simulation models for SH0 ultrasonic wave generation. The paper then presents the ultrasonic wave fields generated by various double-row Halbach EMAT configurations using Finite Element based simulation models and experimentally validated for guided fundamental SH0 mode generated in an Aluminum plate specimen. It is observed that distinct ultrasonic guided wave beam patterns be associated and predicted for different double-row Halbach EMAT configurations.