Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Same E for true stress true strain?

  1. Nov 26, 2014 #1

    kelvin490

    User Avatar
    Gold Member

    Before yield we know that stress/strain= E. Can we obtain the same E if we substitute true stress and true strain in the equation? Why
     
  2. jcsd
  3. Nov 27, 2014 #2

    PhanthomJay

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    For materials that approximately obey Hookes law in the elastic region prior to yield (steel being the classic example), the true E modulus is slightly higher, but insignificant. True stress versus engineering stress becomes significant after yield , especially when necking begins. Before yield, the reduced area of the cross section is a rather small percentage of the original.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Same E for true stress true strain?
  1. Stress-strain diagrams (Replies: 3)

  2. Stress strain plot (Replies: 1)

  3. Stress-strain question (Replies: 0)

Loading...