The effects of fibre orientation on free vibrations of composite beams

Abstract The torsion-flexure coupling effect of generally orthotropic beams is dependent on reinforcing fibre orientation and mode order. At higher ranks of vibration, this coupling effect is principally contributed by the twisting moment induced by bending. The influence of fibre orientation on normal mode shapes is more significant for small values of fibre orientation. The mode shapes can change suddenly with a small increase in fibre orientation.