Machine Design Databook, Second Edition

| g | acceleration due to gravity, m/s 2 (ft/s 2) | |
| r | any radius, m (in) | |
| r i | inside radius, m (in) | |
| r o | outside radius, m (in) | |
| h | thickness of disk at radius r from the center of rotation, m (in) | |
| h 2 | thickness of disk at radius r 2 from the center of rotation, m (in) | |
| ? | uniform tensile stress in case of a disk of uniform strength, MPa (psi) | |
| ? ? | tangential stress, MPa (psi) | |
| ? r | radial stress, MPa (psi) | |
| ? z | axial stress or longitudinal stress, MPa (psi) | |
| ? | density of material of the disk, kg/m 3 (lb m/in 3) | |
| ? | angular speed of disk, rad/s | |
| ? | Poisson's ratio | |
| Particular | Formula |
[1]Lingaiah, K., and B. R. Narayana Iyengar, Machine Design Data Handbook, Volume I (SI and Customary Metric Units), Suma Publishers, Bangalore, 1986.
The thickness of a disk of uniform strength at radius r from center of rotation
The general expression for the radial stress of a rotating disk of uniform thickness
The general expression for the tangential stress of a rotating disk of uniform thickness
The maximum values of stresses are at the center, where r = 0, and are equal to each...