Experimental investigation of the acoustic anisotropy field in the sample with a stress concentrator

The behavior of acoustic anisotropy and the longitudinal wave velocity in the case of multiaxial stress-strain state of the plate under inelastic deformation has been studied experimentally. The plate had a stress concentrator in the form of the central hole. The results for several deformation levels, and the results of finite element analysis of active stresses were presented. The qualitative agreement between the calculated stress fields and the distribution fields of acoustic anisotropy was revealed. It was found that the absolute magnitude maximum of acoustic anisotropy fell on the areas with the biggest stresses near the concentrator. It was supposed that the non-uniform distribution of acoustic anisotropy in the material testified to a possible stress concentration at the corresponding points.