Is it possible to find the yield stress of a material with only modulus of elasticity and Poisson's ratio?(adsbygoogle = window.adsbygoogle || []).push({});

I was given a problem that:

What is the min. aluminum needed to support a block (10 Newton) to 1 meter high? E=70GPa and v=0.3 are the only given aluminum properties.

I would know how to solve it if I knew the yield stress.

Can anyone give me some help?

(I know the yield stress for Al is usually around 270-275, but let's pretend we don't know that).

Thanks a lot!

Leo

-----------------------------------

This is what I have so far:

use Hooke's Law for strain x, y, and z.

stress x = stress z = 0; stress y is in the vertical direction.

strain x = strain z = (-v*stress_y)/E

and I'm stuck...

Thanks.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Finding yield stress with only modulus of elasticity and Poisson's ratio?

**Physics Forums | Science Articles, Homework Help, Discussion**