ETUDE DU COMPORTEMENT MECANIQUE DES CHARPENTES l EN COMPOSITES SOUS L’EFFET DU FLAMBAGE

Abstract

The development of the use of composite materials in structures requires putting in place tools for modeling their mechanical behavior. The study that we conducted consists to determine the effect of the fiber orientation of the folds and the effect of geometric relationships columns on the evolution of the buckling parameter. The analysis is performed in the presence of a compression stress per unit length with an imposed displacement. We are focusing on the finite element method to find the relationship among stress and behavior of structures made of composite materials (Hat section and Lipped channel section).Modeling and simulation were performed using the computer code ABAQUS 6.11. The conducted parameterized study provides some results. The most important of these allows for several conclusions as for example that the fiber orientation of symmetric or antisymmetric columns has no effect on the buckling parameter λ, whatever the type and length of the column (Lipped Channel Section or Hat Section). In addition, the buckling parameter λ increases with the angle θ. Once obtained a maximum value with 45°, the geometric parameters α, β and γ still not change whatever the type of the section and the length of the column ( Lipped Channel Section or Hat Section).