What is maximum principal strain for no failure condition?

Q.  In maximum principle strain theory, maximum principal strain for no failure condition is ________
- Published on 21 Sep 15

a. e = (σx - σy )/ E +τ2
b. e = qmax ≥ qyp
c. e = σyp / E
d. none of the above

ANSWER: e = σyp / E

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    Discussion

  • Sravanthi   -Posted on 25 Nov 15
    - St. Venant's theory is also known as maximum principle strain theory.

    - According to this theory, material subjected to complex stresses fail in simple tensile test, when maximum principle strain reaches the value of strain at yield point.

    - According to this theory, maximum principal strain for no failure condition is given as

    Maximum principle strain ≤ (σyield point stress) / E

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