Linear vs.Non linear analysis of spherical pressure shells

FLORES FERNANDO G.; GODOY LUIS A.

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING

ELSEVIER SCI LTD

Lugar: Amsterdam; Año: 1988 vol. 33 p. 95 - 109

0308-0161

A pressurized thin spherical shell with deviations in shape is analysed using a geometrically linear and a non-linear version of a finite element formulation. A local geometric imperfection, described as a cosine function, is assumed, and the influence of different parameter in the non-linear behavior is considered. The results show the importance of the non-linear terms in the analysis of slender shells, and that a linear analysis can be highly conservative depending on the geometric parameters which define the problem