Question

Stress – strain relation is given as _____

(a) σ=E

(b) σ=Eε

(c) σ=E(ε-ε0)

(d) Undefined

I had been asked this question during an internship interview.

This intriguing question comes from One Dimensional Problems in division One Dimensional Problems of Finite Element Method

Answer 1

Correct choice is (c) σ=E(ε-ε0)

Explanation: Stress is a physical quantity that expresses the internal forces that neighboring particles of a continuous material exert on each other, while strain is the measure of the deformation of the material. Stress- strain relation is given as

 σ=E(ε-ε0).