Question

Virtual strain is ____________

(a) ε(ф)=\(\frac{dx}{d\phi}\)

(b) ε(ф)=\(\frac{d\phi}{dx}\)

(c) ε(ф)=\(\frac{dx}{d\varepsilon}\)

(d) ф(ε)=\(\frac{d\varepsilon}{d\phi}\)

The question was asked in homework.

Query is from One Dimensional Problems in portion One Dimensional Problems of Finite Element Method

Answer 1

The correct choice is (b) ε(ф)=\(\frac{d\phi}{dx}\)

The explanation is: Virtual work is defined as the work done by a real force acting through a virtual displacement. A virtual displacement is any displacement is any displacement consistent with the constraints of the structure.