Buckling of eccentrically stiffened elastic-plastic panels on two simple supports or multiply supported
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Buckling due to axial compression is investigated for elastic-plastic, stiffened wide panels either continuous in the longitudinal direction over several transverse supports or finite and supported along the two edges. An analytical treatment is given of the bifurcation behaviour and of the initial post-bifurcation behaviour of perfect panels compressed into the plastic range. The behaviour of initially imperfect panels is computed numerically using an incremental method. In each increment a linear problem is solved by a combined Rayleigh Ritz-finite element method. Computed examples show a considerable imperfection-sensitivity, both for panels that bifurcate in the plastic range, and for panels with a yield stress a little above the elastic bifurcation stress. 1975.
International Journal of Solids and Structures
author list (cited authors)
Tvergaard, V., & Needleman, A.
complete list of authors
Tvergaard, Viggo||Needleman, Alan