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Homework Help: Elastoplasticity - see picture please!

  1. Sep 22, 2009 #1
    1. The problem statement, all variables and given/known data
    The stress-strain curve of the steel bars may be idealized as elastoplastic with yield stress σy. Each bar has cross sectional area A.
    Determine the yield load PY and the plastic load Pp.

    2. Relevant equations
    σ = F/A

    3. The attempt at a solution
    See picture with my attempt

    - I think I need to relate the angle theta to the elongation, but I'm not sure...
    Help would be greatly appreciated!! (First post)

    Attached Files:

  2. jcsd
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