Critical state of imbalanced rotating anisotropic disks with small radial and shear moduli

Critical speeds and the mass center movement of an imbalanced, circumferentially stiff, radially compliant, rotating annular disk on a stiff shaft and bearings are evaluated. It is demonstrated that recently developed hoop-wound composite material disks having elastomeric resin and carbon fibers can enter a critical state before reaching the circumferential strength limit of the material if certain material and geometric relationships are met.