Turbine Disks for Jet Propulsion Units: An Account of Work of the Disk Panel of the Ministry of Supply, Gas Turbine Collaboration Committee, during the years 1941–1949

It is possible to assess the plastic strain associated with yielding under a two‐dimensional stress system X, Y of a disk, by accepting the shear strain energy as the criterion of yielding, and assuming that the principal plastic strains x, y and z for a general stress system of principal stresses X, Y and Z may be represented by