The development of design criteria for a rotating disk containing noncentral circular hole patterns

The problem of finding the stress distribution about circular, noncentral holes in a spinning disk is discussed. A theoretical approximation is first developed using the methods of elasticity and combining solutions to similar problems from Ling (reference 6) and Timoshenko and Goodier (reference 2). Results are then found in the form of a maximum stress concentration factor which occurs at the edges of the holes. The accuracy of the derived solution is checked by obtaining values photoelastically from a similar spinning disk. Stress patterns are studied in photographs obtained with a strobeflash and camera. The results are presented in a usable form for application to design.