# Shear Stress Quick Question

## Homework Statement

Just a quick question:

Wikipedia tells me that due the shearing stress, the yeild strength of Stainless Steel is 520Mpa

But how can i find out the Yeild strength of a 100mm long rod with diameter 10mm.

Is the info for wikipedia based on a 1mx1mx1m cube? or some sort of SI unit.

Cheers

t=f/a

## The Attempt at a Solution

Related Introductory Physics Homework Help News on Phys.org
Gold Member
The yield point is where plastic deformation occours due to stress.
Stress = Force/Area
Strain = Change in length/Original length.
Young's Modulus = Stress/Strain
You would find the cross sectional area to work out stress. At the yield point the stress and strain are no longer porportional. Since length doesn't matter for strength if you know the area for the stainless steel then you should be able to work out the yeild stress for the rod.

how i can work out the maximum shear stress of 80 mm diameter solid shaft of en 19 alloy steel? i need this in order to work out the minimum shaft diameter that will capable of withstanding the torque applied to it.

PhanthomJay