Question

Ue=\(\frac{1}{2}\int\) σ^T εA  dx is a _____________

(a) Potential equation

(b) Element strain energy

(c) Load

(d) Element equation

The question was posed to me in an interview for internship.

Enquiry is from One Dimensional Problems topic in portion One Dimensional Problems of Finite Element Method

Answer 1

Correct option is (b) Element strain energy

Easiest explanation: The given equation is Element strain energy equation. The strain energy is the elastic energy stored in a deformed structure. It is computed by integrating the strain energy density over the entire volume of the structure.