% Apply force F_global(force_dof) = applied_force;
% Element stresses for e = 1:size(elements,1) n1 = elements(e,1); n2 = elements(e,2); L = nodes(n2) - nodes(n1); u1 = U(n1); u2 = U(n2); strain = (u2 - u1)/L; stress = E * strain; fprintf('Element %d: Strain = %.4e, Stress = %.2f MPa\n', e, strain, stress/1e6); end matlab codes for finite element analysis m files
% 3. Apply Boundary Conditions % - Modify K and F to enforce Dirichlet (displacement) BCs % Apply force F_global(force_dof) = applied_force; % Element
% Plane stress constitutive matrix D = (E/(1-nu^2)) * [1, nu, 0; nu, 1, 0; 0, 0, (1-nu)/2]; % Apply force F_global(force_dof) = applied_force
% --- Assembly --- n_dof = size(nodes,1)*2; K = zeros(n_dof); F = F_applied;