*HEADING
 LARGE STRAIN VISCO - DOUBLE ELEMENT LENGTH--COMPRESSIBLE - CPE4
*NODE
1,
2,10.
3,10.,5.,
4,0.,5.,
*ELEMENT,TYPE=CPE4,ELSET=ONE
1,1,2,3,4
*SOLID SECTION,ELSET=ONE,MATERIAL=SIMPLE
1., 
*MATERIAL,NAME=SIMPLE
*HYPERELASTIC,N=1,MODULI=INSTANTANEOUS
1.5E6,0.5E6,1.E-7
*VISCOELASTIC,TIME=PRONY
0.5,,0.2
0.49,,0.5
*BOUNDARY
1,1,2
2,2,2
4,1,1
*STEP,NLGEOM
*VISCO
5.,10.,2.,10.,
*BOUNDARY
3,1,1,10.
2,1,1,10.
*EL FILE,F=1
S,E,CE,CEP
*NODE FILE,F=1
U,RF
*END STEP