function [K,F] = assemble_global(nodes, elems, D, fe_func) nnode = size(nodes,1); ndof = 2*nnode; K = sparse(ndof, ndof); F = zeros(ndof,1); for e=1:size(elems,1) enodes = elems(e,:); xy = nodes(enodes,:); ke = element_stiffness(xy, D); fe = fe_func(enodes, nodes); % user-defined element force vector dofs = reshape([2*enodes-1;2*enodes],1,[]); K(dofs,dofs) = K(dofs,dofs) + ke; F(dofs) = F(dofs) + fe; end end
We will cover all five stages.
%% Solve u = K_mod \ F_mod; % Nodal displacements matlab codes for finite element analysis m files