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Simply Supported Beam

  1. Sep 29, 2007 #1
    The young's modulus of a simply supported beam is given as E= (11/768)*(WL^3)/(I*Y)...
    where W=Weight of the load
    L=Length of the beam
    I=Moment of inertia

    Is this true???
    Last edited: Sep 29, 2007
  2. jcsd
  3. Sep 29, 2007 #2


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    Science Advisor

    You need to explain the 11/768. I have a suspicion it is for unit conversions. It would be helpful if you explained. You also mention nothing of the force location or type, i.e. concentrated or distributed. There are a lot of beam equations out there for the scenario you describe.
  4. Oct 2, 2007 #3
    Well, it could be. I gotta admit 11/768 is a little strange looking. But, this could be something near 5/386. So, 3 questions?
    Is y the MAXIMUM deflection?
    Where are you measuring y?
    Where is the load?
    I don't think I've ever seen the equation re-arranged like this in order to determine E. Are you doing an experiment?
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