Calc Stress in Steel Beam: F=10kN, A=100mm^2

[thephysicsman]

Homework Statement

[PLAIN]http://img17.imageshack.us/img17/5112/ph2b.jpg a) This steel beam has a quadratic cross-section (A=100mm2). The force F is 10 kN. Calculate the stress in the rod and show that this stress does not exceed the yield strength of the steel.[PLAIN]http://img600.imageshack.us/img600/1163/phya.jpg 2. The attempt at a solution

a)

\sigma = \frac{10000N}{0.0001m^2}=100 MPa

I guess this is right? I'm not sure what the yield strength is. Can I calculate it from the given formulas?

 

[radou]

The result is okay, but note that [MPa] = [N/mm^2], and not [N/m^2], i.e. you didn't need to convert A into [m^2]. I'm not sure what the expressions in the image mean - are you given a yield strength for steel?

 

[thephysicsman]

Thanks for replying.

No, nothing else is given. It is a so-called Failure Assessment Diagram (FAD).