Theta what ??

[C2it]

Ok, I give up.

Ref. ASME VIII Div 2 (2007) page 4-54, equation 4.3.39 for 'sig'sm

Does anyone know what 'theta' represents here ? 'Alpha' is the half cone angle but there seems to be no relevant reference to 'theta'

 

[Canadieng]

See Figure 4.3.7; Page 4-77

 

[C2it]

Thanks for that. I did see the diagram, where 'theta' is the angle from the polar axis. However I don't see the point of 'theta' in the stress equations 4.3.39 and 4.3.40. If there was a reference somewhere to longitudinal moments differing in orthogonal axial planes I could understand it, but there is not.

So what value should one assign to 'theta' for a conical shell ?

 

[MechEngNCPE]

Is it angle of twist?