Effect of Statically Applied Stresses on the Velocity of Propagation of Ultrasonic Waves

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Abstract
The paper gives the results of an experimental investigation of the changes in the velocities of ultrasonic waves propagating transverse to the direction of applied stress in an aluminum column. The ultrasonic modes considered are longitudinal waves, shear waves with particle motion along the direction of applied stress, and shear waves with particle motion transverse to the direction of applied stress. The experimental results indicate that the relevant elastic constant for longitudinal waves is independent of stress, while that for the shear waves is stress dependent and also depends on the relative orientation of the particle motion and the direction of applied stress.