A further creep analysis for rotating solid disks of variable thickness

Abstract

A further creep analysis for stress distributions in rotating solid disks of variable thickness and at uniform temperature is presented herein, based on the Tresca criterion and its associated flow rule. The advantage of this analysis lies in the fact that the complicated problem is to be solved in great simplicity. Disks of gas turbines and jet engines are usually operated at relatively high stresses and high temperatures. Therefore, in this paper the stress analysis for the variable-thickness and uniform-temperature disk at steady-state conditions will be analyzed and discussed by using the exponential function stress-creep-rate relation. Illustrative examples for computing the stress distributions of the variable-thickness and uniform-temperature disk will be presented on the basis of theoretical analysis. For the purpose of comparison the stress distributions for the constant-thickness and uniform-temperature disk will also be given. It will be found that the stress distributions over certain central portions of the disk are quite different between the variable- and constant-thickness disks.