Effect of initial imperfections in geometry on the elastic-plastic stability of a thin annular plate

Abstract

In this paper, Neale's generalized variational principle about incremental boundary-value problems is utilized to study the effect of initial imperfections in geometry on the critical loads of elastic-plastic buckling pf thin annular plates. The calculations show that, if the effect of initial imperfections in geometry is taken into account in the solutions by J, in-cremental theory, the results are very close to the bifurcational buckling loads of the perfect annular plates according to the plastic deformation theory. * Communicated byOuyang Chang. 560 , Jians Zhi-qin~ . . ,