Postbuckling of an Imperfect Plate Loaded in Compression

Jozef Havran, Martin Psotny
2016 Mechanics and Mechanical Engineering   unpublished
The stability analysis of a plate loaded in compression is presented. The non-linear FEM equations are derived from the minimum total potential energy principle. The peculiarities of the effects of the initial imperfections are investigated using the user computer code. Special attention is paid to the influence of imperfections on the post-critical buckling mode. 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.