Code — Composite Plate Bending Analysis With Matlab

% Apply simply supported boundary conditions: w=0 and Mxx=0 => w,xx=0 on x-edges % We'll set w=0 on all edges and use ghost points to enforce curvature=0 % For simplicity, we set w=0 on boundary nodes and eliminate their equations.

strain_global_bot = [kxx; kyy; 2*kxy] * z_bot; stress_global_bot = Q_bar * strain_global_bot; stress_local_bot = T \ stress_global_bot; Composite Plate Bending Analysis With Matlab Code

% Max deflection fprintf('Max deflection = %.2e m\n', max(w(:))); % Apply simply supported boundary conditions: w=0 and

% Load (uniform pressure) F(n) = 1000; % Pa end end 2*kxy] * z_bot

dx2 = dx^2; dy2 = dy^2; kxx = (w(i_center-1,j_center) - 2 w(i_center,j_center) + w(i_center+1,j_center)) / dx2; kyy = (w(i_center,j_center-1) - 2 w(i_center,j_center) + w(i_center,j_center+1)) / dy2; kxy = (w(i_center-1,j_center-1) - w(i_center-1,j_center+1) - w(i_center+1,j_center-1) + w(i_center+1,j_center+1)) / (4 dx dy);

% Reduced stiffness matrix (plane stress) Q11 = E1/(1-nu12 nu21); Q12 = nu12 E2/(1-nu12 nu21); Q22 = E2/(1-nu12 nu21); Q66 = G12;