*HEADING
:  LARGE STRAIN VISCO - VOLUMETRIC RELAXATION CPS4
*RESTART,WRITE
*PREPRINT,MODEL=YES,HISTORY=YES
*NODE
1,
2,10.
3,10.,5.,
4,0.,5.,
5,0.,5.,
*ELEMENT,TYPE=CPS4,ELSET=ONE
1,1,2,3,4
*SOLID SECTION,ELSET=ONE,MATERIAL=SIMPLE
1., 
*surface,NAME=SIDE
1,S3
*MATERIAL,NAME=SIMPLE
*HYPERELASTIC,N=1,MODULI=INSTANTANEOUS
8.,2.,0.1
*VISCOELASTIC,TIME=PRONY
0.,0.5,3.
*BOUNDARY
1,1,2
2,2,2
4,1,1
*ORIENTATION,NAME=ALOCAL,DEF=NODES
1,3,4
*INTEGRATED OUTPUT SECTION,SURFACE=SIDE,NAME=SIDESECT,ORIENTATION=ALOCAL,
REFNODE=5,REFNODEMOTION=AVERAGE
*STEP,NLGEOM
*VISCO
2.,10.,2.,10.,
*BOUNDARY
3,1,1,-2.
2,1,1,-2.
4,2,2,-1.
3,2,2,-1.
*EL PRINT
COORD, S
NFORC, 
*SECTION PRINT,NAME=SID34,SURFACE=SIDE,AXES=LOCAL,UPDATE=YES
4,
3,
SOAREA,SOF
SOM, 
SOCF, 
*SECTION FILE,NAME=SID34,SURFACE=SIDE,AXES=LOCAL,UPDATE=YES
4,
3,
SOAREA,SOF
SOM, 
SOCF, 
*OUTPUT,FIELD,VAR=PRESELECT
*OUTPUT,HISTORY,VAR=PRESELECT,FREQ=2
*INTEGRATED OUTPUT,SECTION=SIDESECT
SOAREA,SOF,SOM,SOCF
*EL FILE,F=1
S,E,CE,CEP
*NODE FILE,F=1
U,RF
*END STEP