Relates in-plane strains to in-plane forces.
[Q]̄modified open bracket cap Q close bracket with bar above ): Use a transformation matrix based on each ply's orientation angle ( ) to convert local stiffness to global coordinates. Integrate the Composite Plate Bending Analysis With Matlab Code
% Element connectivity (4-node rectangular element) ien = zeros(nelem, 4); for j = 1:ny for i = 1:nx e = (j-1) nx + i; n1 = (j-1) (nx+1) + i; n2 = n1 + 1; n3 = n2 + (nx+1); n4 = n3 - 1; ien(e,:) = [n1, n2, n3, n4]; end end Relates in-plane strains to in-plane forces