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2 Mechanics and Mechanical Engineering

2 2016

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Postbuckling of an Imperfect Plate Subjected to the Shear Load

100%

Psotny M.

Mechanics and Mechanical Engineering

2016

tom Vol. 20, nr 2

177--184

The stability analysis of an imperfect plate subjected to the shear load is presented, a specialized code based on FEM has been created. The nonlinear finite element method equations are derived from the variational principle of minimum of total potential energy. To obtain the nonlinear equilibrium paths, the Newton–Raphson iteration algorithm is used. Corresponding levels of the total potential energy are defined. The peculiarities of the effects of the initial imperfections are investigated. Special attention is paid to the influence of imperfections on the post–critical buckling mode. Obtained results are compared with those gained using ANSYS system.

Postbuckling of an Imperfect Plate Loaded in Compression

63%

Havran J. , Psotny M.

Mechanics and Mechanical Engineering

2016

tom Vol. 20, nr 2

143--149

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.