engleski

Stability analysis of a torispherical shell subjected to internal pressure

A geometricaly nonlinear stability analysis of a torispherical shell subjected to internal pressure was performed, using doubly curved finite elements which provide an exact description of the middle surface. The critical pressure and the corresponding buckling mode were calculated. Internal pressure-nodal displacement curves were obtained for the pre- and postbuckling regions for the computation model. The buckling modes in bifurcation points were calculated and the changes of the deflection shape on the postbuckling paths analyzed. The effect of geometric imperfections on the critical pressure was studied. Imperfection shapes affine to buckling modes in bifurcation points were investigated and critical pressure-imperfection amplitude curved obtained.

nonlinear stability analysis; torispherical shell; doubly curved finite element; geometric imperfections

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