Creating local element stiffness matrices (e.g., Q4elementstiffnessMatrix ) and assembling them into a global sparse matrix.
function [nodes, elems] = mesh(Lx, Ly, nx, ny) % returns node coordinates and element connectivity for a rectangular domain [xv, yv] = meshgrid(linspace(0,Lx,nx+1), linspace(0,Ly,ny+1)); nodes = [xv(:), yv(:)]; % build triangular connectivity (2 triangles per quad) elems = []; for j=1:ny for i=1:nx n1 = (j-1)*(nx+1)+i; n2 = n1+1; n3 = n1+(nx+1); n4 = n3+1; elems = [elems; n1 n2 n3; n2 n4 n3]; end end end matlab codes for finite element analysis m files
Each M-file should have:
: Instantly switch between viewing von Mises stress, displacement magnitude, or strain energy density on the same mesh. Dynamic Clipping Creating local element stiffness matrices (e