An annular disk of equilateral hyperbolic profile with outer and inner radii b a...

An annular disk of equilateral hyperbolic profile with outer and inner radii b and a (Fig. 8.13) is shrunk onto a solid shaft so that the interfacial pressure is Demonstrate that, according to the Tresca yield criterion, when the disk becomes fully plastic,

Here is the yield point stress and r represents any arbitrary radius.