*HEADING
 VISCOELASTIC ROD SUBJECTED TO CONSTANT AXIAL LOAD -- CAX8H 
 UNITS: PSI, IN.
 LARGE STRAIN ELASTIC BEHAVIOR
*restart,write
*NODE
1,
3,0.5
13,0.,10.
15,0.5,10.
*NGEN
1,3
13,15
1,13,3
2,14,3
3,15,3
*NSET,NSET=BOT
1,2,3
*NSET,NSET=CENT
1,4,7,10,13
*ELEMENT,TYPE=CAX8H,ELSET=SOLID
1,1,3,15,13,2,9,14,7
*SOLID SECTION,ELSET=SOLID,MATERIAL=VISCO
*MATERIAL,NAME=VISCO
*HYPERELASTIC,N=1,MODULI=INSTANTANEOUS
1000.,666.6667,0.00002,0.
*VISCOELASTIC,TIME=PRONY
0.901001112,0.0,0.99
*BOUNDARY
BOT,2
CENT,1
*surface,NAME=SIDE
1,S3
*STEP,NLGEOM
*VISCO
1.0E-3,1.E-3
*DLOAD
1,P3,-100.
*CONTROLS,PAR=FIELD,FIELD=DISP
 1.0e-6
*NODE PRINT
U, 
*EL PRINT
S, 
E, 
EE, 
NFORC, 
*SECTION PRINT,NAME=SID34,SURFACE=SIDE,AXES=LOCAL,UPDATE=YES
14,
13,
*SECTION FILE,NAME=SID34,SURFACE=SIDE,AXES=LOCAL,UPDATE=YES
14,
13,
*OUTPUT,FIELD,FREQ=1
*NODE OUTPUT
 U
*OUTPUT,HIST,FREQ=1
*ELEMENT OUTPUT,ELSET=SOLID
 E22,S22,CE22,CEEQ
*END STEP
*STEP,NLGEOM,INC=50
*VISCO,CETOL=5.E-3
1.,50.
*CONTROLS,RESET
*END STEP