Question

In the equation KQ=F, K is called as ____

(a) Stiffness matrix

(b) Modified stiffness matrix

(c) Singular stiffness matrix

(d) Uniform stiffness matrix

I have been asked this question by my college professor while I was bunking the class.

My question comes from Two Dimensional Problems in section Two Dimensional Problems using Constant Strain Triangles of Finite Element Method

Answer 1

The correct option is (b) Modified stiffness matrix

The explanation: The stiffness matrix represents system of linear equations that must be solved in order to ascertain an approximate solution to differential equation. The stiffness and force modifications are made to account for the boundary conditions.