Ultimate shear and ultimate tensile relation

[fishercd]

Is saying that the ultimate shear allowable is approx. equal to 0.6 times the ultimate tensile allowable if only the tensile allowable is known? I'm trying to "fix" a horribly made appendix and I've never encountered this relation before.

 

[JAE]

What material?

 

[fishercd]

1/4-28 bolts. 80,000 psi tensile strength. that's all the information I have from the specs.

 

[boo1]

The Distortion-Energy theory states that the yield strength in shear is given by the equation;

Sxy=0.577 x Sy


The Maximum-Shear-Stress theory states that the yield strength in shear is given by the equation;

Sxy=0.50 x Sy

Ref Mechanical Engineering Design 4th ed Shigley pp 232, 234

Cheers