Survey of plain stress condition of a perforated plate by the acoustoelasticity method

During stretching of a steel plate with elliptical holes by an ultrasonic nondestructive method the stress state of the part material was surveyed in the elastic area. The results of experimental determination of biaxial stresses were checked by the reference method of analytical calculation. The check showed that the difference between the experimental and theoretical data does not exceed several per cent of the material yield limit, which permits us to rely on wider practical application of the acoustoelasticity method for surveying the effects of stress concentrations near fabrication holes in the parts of machines and structures. The IN-5101 A portable device developed by “INKOTES” Engineering Company was used in the tests.