*HEADING
 LARGE STRAIN VISCOELASTICITY - FOAM MODEL (TEST DATA) - CPE4
 KEYWORD-PARAMETER COMBINATION TESTED: VISCO,STABILIZE
*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
*HYPERFOAM,N=3,TEST DATA INPUT,POISSON=0.,MODULI=INSTANTANEOUS
*UNIAXIAL TEST DATA
 -39. ,   -.05
 -57. ,   -.10
 -66. ,   -.15
 -72. ,   -.20
 -78. ,   -.25
 -84. ,   -.30
 -90. ,   -.35
 -96. ,   -.40
-102. ,   -.45
-108. ,   -.50
-115. ,   -.55
-130. ,   -.60
-150. ,   -.65
-185. ,   -.70
-260. ,   -.75
-400. ,   -.80
*VISCOELASTIC,TIME=PRONY
0.5,0.5,3.
*BOUNDARY
1,1,2
2,2,2
4,1,1
*STEP,NLGEOM,INC=200
*VISCO,CETOL=.01,STABILIZE,ALLSDTOL
2.,10.,,10.,
*BOUNDARY
3,1,1,2.
2,1,1,2.
*EL FILE,F=1
S,E,CE
*NODE FILE,F=1
U,RF
*output,field
*element output
elen
*END STEP