*HEADING
 LARGE STRAIN VISCO - MEMBRANE - M3D4
*NODE
1,
2,10.
3,10.,5.,
4,0.,5.,
*ELEMENT,TYPE=M3D4,ELSET=ONE
1,1,2,3,4
*MEMBRANE SECTION,ELSET=ONE,MATERIAL=SILLY
1., 
*MATERIAL,NAME=SILLY
*HYPERELASTIC,N=1,MODULI=INSTANTANEOUS
8.,2.,0.001
*VISCOELASTIC,TIME=PRONY
0.5,,1.
0.49,,2.
*DENSITY
1.5, 
*INITIAL CONDITIONS,TYPE=STRESS,UNBALANCED=STEP
ONE,1.
*BOUNDARY
1,1,2
2,2,2
4,1,1
*STEP,NLGEOM,INC=25
*VISCO
.1,1.
*BOUNDARY
3,1,1,2.
2,1,1,2.
*EL FILE,F=1
S,E,CE,CEP
*NODE FILE,F=1
U,RF
*END STEP