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Homework Help: Stress/Strain and Youngs Modulus

  1. Jan 10, 2017 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution
    The shaded area is a triangle so the area of a triangle for this particular graph is this:

    0.5 (Stress)(Strain) which gives:

    0.5(F/A)(e/L) so the top would give work done and the bottom would give volume but we're still left with 0.5 in front of this so the answer should be A yet the answer is B? Why has the half disappeared?
  2. jcsd
  3. Jan 10, 2017 #2


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    Science Advisor

    The work done is not F*e because F is not constant throughout the process. The work done is the integral of Fde, which for a Hookean process is 0.5Fe
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