ELASTIC-PLASTIC STRESSES IN A ROTATING SOLID DISK

A polynomial stress-strain relation is proposed for rotating disks wit h non-linear strain hardening materials. The basic equation of the dis ks with constant thickness and constant density under plane stress is derived from the deformation theory of plasticity, Von Mises' yield cr iterion and the proposed stress-strain relation. A computing method fo r such rotating solid disks is developed and the approximate analytica l solution is obtained. The validity of the solution is demonstrated b y comparing the analytical calculation results with the finite element ones and very good agreement is found. The proposed solution is much more efficient and eassier to use than the FE approach. (C) 1998 Elsev ier Science Ltd. All rights reserved.