抄録
In this paper, we have attempted to precisely formulate a generalized acoustoelastic theory by extending the theory proposed by Kobayashi [1987], which was derived to evaluate acoustoelastic effects of ultrasonic waves induced by slight orthotropy in elasticity and plastic anisotropy growth in plastically deformed solids. Moreover, in order to examine the accuracy of the proposed theory, numerical calculations of the transverse wave velocity changes in the elastoplastic range were carried out and compared with the experimental data on a commercially available pure aluminum specimen subjected to uniaxial tension. The good agreement between theoretical and experimental results indicates that the plastic anisotropy is closely related to the acoustoelastic effects through the elastoplastic coupling strain rate induced by the vertexlike yield effects at the corner of the yield surface.
