Measurement of torque based on ultrasonic method?

22 November 2022 1 1K Report

Based on the acoustic-elastic effect, the ultrasonic method can measure the axial force of the bolt. Can it measure the torque of the bolt?

Wieslaw Bicz

The speed of sound waves depends on stress in solid material. This allows to measure axial stress (if you know the dependence between stress and sound speed) and it would be also possible to measure the stress in all other directions - also circumferential. It would be possible with SH or critically refracted waves. It requires some skills, but should be possible.

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