Study of the Effect of Cutout Bluntness on Stress Analysis of Perforated Plates Subjected to Uni-axile Tensile Load

In practical application, creation of cutout is inevitable. Besides on the other hand, the cutouts reduce the load carrying capability of structures. These cutouts cause stress concentration in the structure which is important in design problems. Since the stress distribution is not uniform due to the presence of cutout, for plane stress problems, the selection of appropriate cutout bluntness can reduce stress concentration factor (SCF). The analytical solution which is based on the Lekhnitskii theory is used for determining the stress distribution in composite and isotropic materials containing a central cut out and subjected to tensional load. Only circular and elliptical cut outs were solved for anisotropic materials by Lekhnitskii. In this paper, by using the complex variable theory, the Lekhnitskii method is expanded to study of the effect of cutout bluntness as effective parameter to reduce SCF on stress distribution around different cutouts. results based on analytical solution are compared with the results obtained using finite element method. The results obtained clearly demonstrate the effect of cutout bluntness on stress concentration in perforated plates subjected to uni-axial tensile load.