Torsional Yield Stress 1

[davidneedshelp]

I have calculated the maximum torsional shear stress in a round tube and now wish to check that the material I choose (steel, type to be decided) will not fail.

Materials data tables give you the tensile yield stress, or 0.2% proof strength. Is there a rule or formula to convert the tensile yield stress into a value used for torsion?

Thank you for your help.

 

[CoryPad]

Torsion induces shear. Shear and tension are related by various failure criteria. A popular one is the von Mises criterion. An Internet search will provide you with what you need.

Regards,

Cory

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