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Stress in a beam

  1. Feb 14, 2011 #1
    1. The problem statement, all variables and given/known data

    [PLAIN]http://img17.imageshack.us/img17/5112/ph2b.jpg [Broken]

    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 [Broken]

    2. The attempt at a solution


    [tex]\sigma = \frac{10000N}{0.0001m^2}=100 MPa[/tex]

    I guess this is right? I'm not sure what the yield strength is. Can I calculate it from the given formulas?
    Last edited by a moderator: May 5, 2017
  2. jcsd
  3. Feb 14, 2011 #2


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    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?
  4. Feb 14, 2011 #3
    Thanks for replying.

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