Stress Distribution in Rotating Disks of Ductile Material After the Yield Point Has Been Reached

This paper covers a study of the distribution of stress in a rotating disk of ductile material (of uniform thickness, with and without a central hole) after the yield point has been passed. Curves are computed showing the growth of the “plastic” region at different speeds, until the whole disk has become plastic. General methods are developed, and applied to examples for finding the complete distribution of stresses and strains in such disks.

While the conditions assumed are seldom exactly realized, the results should throw light on many practical problems as well as form a starting point for a more complete investigation of more complex problems of plastic flow in ductile materials.