The Effect of Fiber Volume Fraction Non-uniformity through Thickness Direction on the Torsional Buckling Load of Cylindrical Composite Lattice Structure

A cylindrical composite lattice structure is manufactured by filament winding. The distribution of non-uniform fiber volume fraction induced by the manufacturing process can be observed. The stiffness and buckling characteristics can be influenced by non-uniform fiber volume fraction. In this paper, the effect of non-uniform fiber volume fraction through thickness direction on the torsional buckling load of the cylindrical composite lattice structure was examined. The stiffness variation induced by the non-uniform fiber volume fraction was applied to the finite element model, and buckling analysis was performed. The variations of buckling load with variations of fiber volume fraction were compared. The non-uniform fiber volume fraction reduced the torsional buckling load of the composite lattice structure.