Question

Dimension of global stiffness matrix is _______

(a) N X N, where N is no of nodes

(b) M X N, where M is no of rows and N is no of columns

(c) Linear

(d) Eliminated

I have been asked this question during an interview.

My enquiry is from One Dimensional Problems in chapter One Dimensional Problems of Finite Element Method

Answer 1

The correct option is (a) N X N, where N is no of nodes

For explanation: A global stiffness matrix is a method that makes use of members stiffness relation for computing member forces and displacements in structures. The dimension of global stiffness matrix K is N X N where N is no of nodes.