stiff_truss2.m ex-tria1.dat ex-tria2.dat EX-truss1.dat EX-truss2.dat feaplyc2.m feasmbl1.m feasmbl2.m file_input.m file_triout.M filein.m force_cst.m force_truss2.m form_emdof.m get_edisp.m get_emnode.m get_emprp.m get_emxyz.m main.m output_file.m stiff_cst.m