An estimation of the strain-stress state under cyclic loading by the acoustoelasticity method

The paper studies the applicability of the acoustoelasticity method to estimation of the strain-stress state under cyclic loading. It has been found that the uniform distributions of acoustic anisotropy along the working part of the sample and of the velocities of longitudinal and transverse ultrasonic waves become substantially non-uniform with an increase in the number of stress cycles. Moreover, the largest absolute values of acoustic anisotropy fell on the points with the largest plastic deformations, in particular, in the area of sample dispersion. The effect was being recorded from the early stages of sample loading until the fracture of the sample.