Theory of Structures - Engineering

Q1:

Maximum strain theory for the failure of a material at the elastic limit, is known as

A Guest's or Trecas' theory

B St. Venant's theory

C Rankine's theory

D Haig's theory

E Von Mises's theory.

ANS:B - St. Venant's theory

1. Maximum shear strain energy theory = Von Mises Hencky theory.
2. Max. Strain energy theory = Haig's theory.
3. Max shear stress theory = Guest's or Trecas' theory.
4. Max principal strain energy theory = St. Venants theory.
5. Max principal stress theory Rankine's theory.