Question

Write the element stiffness for a truss element.

(a) K=\(\frac{A}{l}\)

(b) K=\(\frac{AE}{l}\)

(c) K=\(\frac{E}{l}\)

(d) K=AE

This question was posed to me in a job interview.

I want to ask this question from One Dimensional Problems in portion One Dimensional Problems of Finite Element Method

Answer 1

Correct choice is (b) K=\(\frac{AE}{l}\)

For explanation I would say: Truss is a structure that consists of only two force members only. Where the members are organized so that the assemblage as a whole behaves as a single object.