Influence of stiffener shape on the buckling loads of aluminum stiffened plate

Abstract EN

Buckling study represents one of the most important studies for structures subjected to in plane loads so that it provides the researcher by an excellent information's specially at critical design levels.

These informations are buckling modes, buckling types, and critical buckling loads which should be taken into the consideration at design process.

In this research, a stiffened plate formed form 5083 aluminum alloy for two cases of stiffening.

In the first case, the stiffeners were a flat plate and the second the stiffeners were changed into what corresponding in quadrilateral, triangular, and circular type.

Also, effect of the changing in the stiffeners shape and stiffening locations under same boundary conditions on the buckling modes and buckling loads was also studied.

From the results, it was noted that the changing in the stiffeners shape (keeping the same thickness and length of the stiffeners) doesn’t lead to increase the buckling load only, but to convert the structural behaviors from mode to other.

Location of stiffening play an important rule in assessment the stiffness of the structure.

The mathematical modeling was achieved using ANSYS finite element program.

At last, a numerical program includes all above features written in APDL (Ansys parametric design language) was achieved and added to the ANSYS milieu as a new feature.