*include, input=substr_multi_nodes.inp
*Element, type=CPE4,elset=cpe
*Solid Section, elset=cpe, material=Elas
1.,
*Material, name=Elas
*Density
70.,
*Elastic
 1e+08,0.
************************
*element,type=spring1,elset=spr
*spring,elset=spr
2,
1000,
** ----------------------------------------------------------------
*Step, name=Stp1, nlgeom, inc=1000
Small deformation
*Static, direct
0.1, 1.,0.1,0.1
*controls,param=field
1.e-8,
**
*boundary
5,1,2
*Cload
21, 2, 500.
*Output, field
*node output
u,
*End Step