Vibration analysis of composite disks

Often, disks rotating at high speeds are fabricated from high-strength, filament-wound composites. The carbon and glass fiber bundles, or tows that make up a filament, are often similar in different disk designs, and steady-state stress analyses are usually reported. Typically, little information is reported about the dynamic deformation and vibrations of the disk, which are important for understanding instabilities at high rotational speeds. First, experimental and FEM modal analyses are performed for a non-rotating disk to verify the FEM model. The disk is made from composite rings which are press-fit or urethane bonded onto a hub. Then, the FEM model is used to analyze the effect of prestressing and stress stiffening due to rotation at various speeds.