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.
