Buckling Analysis of Hemi-Ellipsoidal Shells subjected to External Pressure

Abstract

This paper focuses on the buckling analysis of the hemi-ellipsoidal shells subjected to a uniformly distributed load by using ABAQUS program. The shape of hemi-ellipsoidal shells can be represented by the revolution of ellipsoidal curve. The frictionless rollers are supported around the circumference base, they are free to translate in the plane that is normal to the middle surface and free to rotate in the meridional plane. The material property used in the finite element model is assumed to be isotropic and linear elastic. The critical loads and the corresponding buckling mode shapes of hemi-ellipsoidal shells are investigated and demonstrated for the various values of the major to minor semi-axis of an ellipsoidal ratio and the thickness.