How to write a function to get the element stiffness matrix for each element?

The inputs should be E, A, and L. The output should be a 2x2 matrix. I have used the function script thing but for some reason it is not working.

Answer 1

[Dheeraj]

Hi Gervie,

To write a function that computes the element stiffness matrix for a 1D bar or truss element, given the inputs of modulus of elasticity E, cross-sectional area A, and length L, you can use the following standard stiffness matrix formulation:

You could use the below code to get the 2X2 output.

function K = elementStiffnessMatrix(E, A, L)
    if L <= 0
        error('Element length must be greater than zero.');
    end
    K = (E * A / L) * [1, -1; -1, 1];
end

Thank You.