Find shear strength from tensile strength
Find shear strength from tensile strength
(OP)
I would like to know if there is a rule of thumb for determining shear strength from tensile strength. For some reason I thought I could multiply tensile strength by 0.6 to get a shear strength value but may just be making that up. The material I am using is a 303 stainless steel with yield strength of about 35 ksi. I will be using it as a pin and need to determine the appropriate diameter of the pin. Thanks for you time.





RE: Find shear strength from tensile strength
RE: Find shear strength from tensile strength
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Find shear strength from tensile strength
diblazing
RE: Find shear strength from tensile strength
Ssy = 0.5 Sy
The distortion-energy theory of yielding predicts the yield strength in shear to be:
Ssy = 0.577 Sy (this rounds off to be 0.6 Sy)
Ssy = 0.5 Sy is generally used for design purposes since it is conservative and provides some margin to failure. However, if you are investigating a failure, you should use Ssy = 0.577 Sy since it is more accurate and matches well with the test results.
I hope it helps
RE: Find shear strength from tensile strength
Your information relates to yielding in ductile materials. diblazing's application, a pin, routinely is sized to provide a known shear resistance at fracture, hence the relationship to ultimate tensile strength.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Find shear strength from tensile strength
diblazing
RE: Find shear strength from tensile strength
RE: Find shear strength from tensile strength
The real answer is to test a material sample from the batch you are using as quoted figures are only an approximation anyway.
But what sort of factor of safety will be used? In many cases the higher the factor the less accurate the ultimate figure need be.