Question

Which theory is best to estimate failure load for a ductile material ?

• A. Distortion energy theorem
• B. Maximum strain energy theorem
• C. Maximum shear stress theorem
• D. None of these

Answer 1

Answer:

A. Distortion energy theorem

Distortion energy theorem (Von Mises) is the best theory to estimate failure load for ductile material. It states that failure occurs when the strain energy of distortion per unit volume absorbed at any point is equal to that absorbed per unit volume at any point in a bar stressed to the elastic limit under uniaxial stress.