## 3. A simple element analysis (cont'd)

The right-hand side is a vector of nodal applied forces and $$\mathbf S$$ is known as the element stiffness matrix.

For a triangle with one degree of freedom at each node, the stiffness matrix will be 3×3. Each component of the matrix represents the stiffness existing between one node and another (or itself, along the diagonal). The stiffness relationship between two nodes is symmetrical.

R. Funnell