Stress Concentration Factor Converts into Stress Intensity Factor using ANSYS

ankur.joshi1990 @gmail.com _____________________________________________________________________________________________ ABSTRACT Analysis has been done by using ANSYS APDL software package for different values of aspect ratio in a plate with central-elliptical hole and is subjected to a pressure at the ends. A static load is gradually applied to a mechanical component. It’s been observed that the presence of holes in the body makes it prone to stress concentration and thus the stress near these stress raisers becomes larger than the nominal stress by a certain amount. This stress can be determined by analytical methods or by Finite Element Analysis. FEA divides (discretize) the structure into small but finite, well defined, elastic substructures (elements). A continuous elastic plate of size (400x100x10) mm is prepared and material for which is selected as steel with a central elliptical hole of major radius of 10mm. The minor radius has been determined in each case with the help of the aspect ratio for each case. The plate is discretized with SOLID 8 QUAD 183 elements which are already available in the element library of ANSYS. The model has analyzed for different aspect ratios viz; 0.1, 0.2, 0.3,.....,0.9 and 1.0 of the elliptical hole by keeping the dimensions of plate fixed and value of maximum equivalent Von-Mises stress and deflection of plate under a constant pressure is determined with the help of ANSYS. Effect of the geometry of hole on the stress distribution around the hole is studied. The results of various analyses is presented with the help of tables, graphs and nodal plots as provided by ANSYS.