Stable Paths in the Postbuckling of an Imperfect Slender Web Loaded in Compression

Abstract

The stability analysis of a slender web loaded in compression is presented. The non-linear FEM equations are derived from the variational principle of minimum of potential energy. The peculiarities of the effects of the initial imperfections are investigated using user program. Special attention is paid to the influence of imperfections on the post-critical buckling mode. Stable load-displacement paths are investigated. The FEM computer program using a 48 DOF element has been used for analysis. FEM model consists of 4x4 finite elements. Full Newton-Raphson procedure has been applied.

Slender metal web stability analysis: Impact of initial imperfection on the mode of buckling

“…Displacement control procedure was first presented by Batoz and Dhatt [7] in 1979. In the case of snap-back, this option fails, but there are still some perspectives in the possibility to change the pivot parameter during the calculation [8,9]. In this case the interactive approach and calculation check are requisite.…”