مطالعه تجربي و عددي كمانش پوسته هاي استوانه اي فولادي با گشودگي شبه بيضوي تحت بار فشاري محوري

Experimental and Numerical Study of Buckling of Steel Cylindrical Shells with Quasi Elliptical Cutout Subjected to Axial Compression load

Understanding the influences of cutout in load bearing capacity and buckling behavior of cylindrical shells is a fundamental concern in the design of structural components used in automobiles, aircrafts, and marine structures. In this article, simulation and analysis of steel cylindrical shells with various lengths, including quasi elliptical cutout, subjected to axial compression load were systematically carried out using finite element method and the investigation examined the influence of the cutout location and the shell aspect ratio (L/D) on the buckling, and the postbuckling responses of the cylindrical shells. For several specimens an experimental investigation was also carried out via an INSTRON 8802 servo hydraulic machine. The results obtained from the experiments were compared with numerical results. A very good agreement was observed between the mentioned results. Finally, corresponding to experimental and numerical results, an expression was derived for finding the buckling load of such structures.