Recent Developments in Computational Mechanics,
AD-Vol.39 (Eds. P.K.Basu, A.Nagar),
pp. 83-92, 1993
X. Wang and F.G. Rammerstorfer
Institute of Lightweight Structures and Aerospace
TU Wien, Vienna, Austria
The effective width concept is a proper and often used method for engineering
estimates of the postbuckling behavior of stiffened plates.
For plate configurations which show local buckling before global buckling,
this concept allows the calculation of the interaction of this local buckling
with the subsequent global one or with other kinds of postbuckling failure.
Several formulae (most of them empirically derived) exist for an approximative
calculation of the load dependent value of the effective width.
It is the aim of this paper to present a numerical approach for calculating
this important desing parameter by using a nonlinear finite strip method.
This method also allows the computation of the elastic postbuckling behavior
up to complete collapse.