Mechanical Effects of Welding
(Eds. L.Karlsson, L.E.Lindgren, M.Jonsson),
pp. 239-259, 1992
F.G. Rammerstorfer, I.C. Skrna-Jakl and M. Zelezny
Institute of Lightweight Structures and Aerospace
TU Wien, Vienna, Austria
This paper deals with the computation of the elastic and elastoplastic
stability of welded shells (cylindrical and spherical shells) under
mechanical or thermal loading.
It is assumed that the residual welding stresses and welding distortions are
either known or can be predicted by numerical methods or analytical
The determination of the bifurcation or limit points is performed by
numerical discretization methods using finite element or finite difference
The influence of welding stresses is simulated either directly by initial
stresses introduced into the governing equations or by a fictitious
temerature field which leads to a thermal stress field similar to the
residual welding stress field.
Welding distortions are treated as geometrical imperfections.
Specific emphasis lies on circular cylindrical shells with circumferential
Some fundamental considerations regarding buckling due to fictitious or
reals thermal loads are presented.