*HEADING
*PREPRINT, MODEL=YES
*NODE,NSET=ALL
 11,
 12,1.
 13,1.,1.,
 14,0.,1.,
 15,0.,0.,1.
 16,1.,0.,1.
 17,1.,1.,1.
 18,0.,1.,1.
*NSET,NSET=FACE11
 11,12,13,14
*NSET,NSET=FACE12
 15,16,17,18
*NSET,NSET=FACE13
 11,12,15,16
*NSET,NSET=FACE14
 13,16,17
*NSET,NSET=FACE15
 13,14,17,18
*NSET,NSET=FACE16
 14,11,18,15
*NSET, NSET=NDISP1
 12
*ELEMENT,TYPE=C3D8R,ELSET=C3D
 1,11,12,13,14,15,16,17,18
**
*ELSET, ELSET=EALL
 C3D
*SOLID SECTION,ELSET=EALL,MATERIAL=low_density_foam
 1.0,
*MATERIAL,NAME=low_density_foam
*DENSITY
 5.0000e-010,
*HYPERFOAM, N=3
-1048.43,0.3025,532.20,0.3958,517.027,0.2135,0.2,0.2,
0.2
*MULLINS EFFECT, TEST DATA INPUT
** 1.75,  0.3,  0.6
*UNIAXIAL TEST DATA
1.104,0.5
1.005,0.475
0.914,0.45
0.8291,0.425
0.6775,0.375
0.610,0.35
0.5474,0.325
0.4892,0.3
0.4349,0.275
0.3843,0.25
0.3367,0.225
0.2919,0.2
0.2496,0.175
0.2094,0.15
0.1711,0.125
0.1344,0.1
0.099174,0.075
0.065122,0.05
0.032106,0.025
0.,0.
*UNIAXIAL TEST DATA
2.267,1.0
1.996,0.95
1.752,0.9
1.536,0.85
1.345,0.8
1.179,0.75
1.034,0.7
0.9080,0.65
0.7968,0.6
0.6981,0.55
0.6096,0.5
0.5292,0.45
0.4554,0.4
0.3869,0.35
0.3227,0.3
0.2622,0.25
0.2046,0.2
0.1499,0.15
0.097544,0.1
0.047555,0.05
0.,0.
*EQUATION
 2,
 FACE14,1,1,NDISP1,1,-1
*NSET, NSET=NDISP
 NDISP1
*BOUNDARY
 FACE11,3
 FACE13,2
 FACE16,1
*STEP,NLGEOM
 UNIAXIAL LOADING
*STATIC
5.0e-4,1.0e-2,,5.0e-4
*BOUNDARY
 NDISP,1,1,0.5
*OUTPUT,FIELD, VARIABLE=PRESELECT
*OUTPUT, HISTORY, VARIABLE=PRESELECT
*ELEMENT OUTPUT, ELSET=EALL
 S11, LE11, NE11, ENER
*NODE OUT, NSET=NDISP
 RF1
*ENERGY OUTPUT
 ALLDMD
*EL PRINT
DGP,
SENER,
*NODE PRINT,NSET=NDISP
U1,RF1
*END STEP
*STEP,NLGEOM
 UNLOADING
*STATIC
5.0e-4,1.0e-2,,5.0e-4
*BOUNDARY,OP=NEW
 FACE11,3
 FACE13,2
 FACE16,1
 NDISP,1,1,0.
*END STEP
*STEP,NLGEOM
 UNIAXIAL LOADING
*STATIC
5.0e-4,1.0e-2,,5.0e-4
*BOUNDARY
 NDISP,1,1,1.0
*END STEP
*STEP,NLGEOM
 UNLOADING
*STATIC
5.0e-4,1.0e-2,,5.0e-4
*BOUNDARY,OP=NEW
 FACE11,3
 FACE13,2
 FACE16,1
 NDISP,1,1,0.
*END STEP