Further Studies of Stress Distribution in Rotating Disks and Cylinders Under Elevated-Temperature Creep Conditions

Abstract

Abstract The analysis previously given for stress in rotating disks having central holes and under steady-state creep conditions is extended to cases where the radial and tangential stresses are equal over all or a portion of the disk, both constant and variable-thickness cases being considered. In addition, the solid rotating disk and the long rotating solid cylinder are treated, peak stresses above the elastic values being found under certain conditions. Charts are presented for determining ratios σtm/σtav between peak stress and average stress, for various diameter ratios, disk contours, and values of n in the power-function stress-creep rate relation. These indicate somewhat lower ratios of peak to average stress for the variable-thickness disks. Based on the theoretical results, curves of stress distribution are also worked out for several typical cases.