A simple method of determining ultrasonic velocities in rocks

Subba Rao, K. ; Ramachandra Rao, B. (1957) A simple method of determining ultrasonic velocities in rocks Nature, 180 . p. 978. ISSN 0028-0836

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Official URL: http://www.nature.com/nature/journal/v180/n4593/ab...

Related URL: http://dx.doi.org/10.1038/180978a0


We have devised a simple method of determining elastic constants of rocks which is based on the principle of the critical angle method employed by Schneider and Burton. In this method a narrow beam of ultrasonic waves strikes the rock section immersed in a liquid at right angles to its axis of rotation, and the critical angles θd and θs for total reflexion of the longitudinal and transverse waves set up in the section are determined experimentally. Knowing the velocity of ultrasonic waves V in the liquid, the velocities of longitudinal and transverse velocities Vd and Vs in the rock section are determined by using the familiar relations, Vd = V/sin θd; Vs = V/sin θs.

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