The dynamics of cracked rotors has been the study for the last three decades. However, considering the importance in the practical fields, the vibration characteristics of cracked rotors are still under active investigation. It needs more attention, particularly with the emerging of new materials such as composites for shafts. The present study aims at the analysis of the cracked composite shafts. The composite shaft has been modelled based on first order shear deformation theory using finite element method with shell elements. Different materials such as, boron-epoxy, carbon-epoxy and graphite-epoxy have been tried for various stacking sequences. The influences of crack parameters, fibre orientation (stacking sequences) and material properties on the vibration characteristics of composite shafts have been studied.

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