Matlab Codes For Finite Element Analysis M Files -

% 5. Post-processing % - Compute stresses, strains, reaction forces % - Visualize results Problem: Axially loaded bar with fixed-free boundary conditions. M-file: truss_1d.m

% Load: tension on right edge (nodes 2 and 3) force_val = 1000; % N/m % Node 2: Fx = force_val * area? For simplicity, point load F_applied = zeros(size(nodes,1)*2, 1); F_applied((2-1)*2 + 1) = force_val * 0.05 * thickness; % Node 2, ux F_applied((3-1)*2 + 1) = force_val * 0.05 * thickness; % Node 3, ux matlab codes for finite element analysis m files

% Apply force F_global(force_dof) = applied_force; point load F_applied = zeros(size(nodes

% Coordinates x = nodes([n1,n2,n3], 1); y = nodes([n1,n2,n3], 2); % Node 2

% Plane stress constitutive matrix D = (E/(1-nu^2)) * [1, nu, 0; nu, 1, 0; 0, 0, (1-nu)/2];

% Assembly into global matrix dof_list = [n1, n2]; K_global(dof_list, dof_list) = K_global(dof_list, dof_list) + ke; end

% 1D Truss Finite Element Analysis clear; clc; close all; % --- Pre-processing --- % Material properties E = 210e9; % Young's modulus (Pa) A = 0.01; % Cross-sectional area (m^2)