*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
*NSET, NSET=NGRP1
 11,13,14
*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
*BIAXIAL TEST DATA
1.162,0.5
1.042,0.475
0.9319,0.45
0.8323,0.425
0.7424,0.4
0.6617,0.375
0.5891,0.35
0.5238,0.325
0.4649,0.3
0.4114,0.275
0.3626,0.25
0.3177,0.225
0.2760,0.2
0.2369,0.175
0.1999,0.15
0.1646,0.125
0.1305,0.1
0.097381,0.075
0.064801,0.05
0.032453,0.025
0.,0.
*BIAXIAL TEST DATA
2.304,1.0
2.006,0.95
1.741,0.9
1.510,0.85
1.311,0.8
1.142,0.75
0.9977,0.7
0.8750,0.65
0.7693,0.6
0.6770,0.55
0.5951,0.5
0.5211,0.45
0.4531,0.4
0.3896,0.35
0.3295,0.3
0.2719,0.25
0.2161,0.2
0.1616,0.15
0.1079,0.1
0.054225,0.05
0.,0.
*EQUATION
 2,
 FACE14,1,1,NDISP1,1,-1
*EQUATION
 2,
 NGRP1,3,1,NDISP1,3,-1
*NSET, NSET=NDISP
 NDISP1
*BOUNDARY,TYPE=VELOCITY
 FACE12,3
 FACE13,2
 FACE16,1
*STEP,NLGEOM
 BIAXIAL LOADING
*STATIC
5.0e-4,1.0e-2,,5.0e-4
*BOUNDARY
 NDISP,1,1,0.5
 NDISP,3,3,-0.5
*OUTPUT,FIELD, VARIABLE=PRESELECT
*OUTPUT, HISTORY, VARIABLE=PRESELECT
*ELEMENT OUTPUT, ELSET=EALL
 S11, LE11, NE11, ENER
*NODE OUT, NSET=NDISP
 RF1,RF3
*ENERGY OUTPUT
 ALLDMD
*NODE PRINT,NSET=NDISP
U1,RF1
*END STEP
*STEP,NLGEOM
 UNLOADING
*STATIC
5.0e-4,1.0e-2,,5.0e-4
*BOUNDARY,OP=NEW
 FACE12,3
 FACE13,2
 FACE16,1
 NDISP,1,1,0.
 NDISP,3,3,0.
*END STEP
*STEP,NLGEOM
 BIAXIAL LOADING
*STATIC
5.0e-4,1.0e-2,,5.0e-4
*BOUNDARY
 NDISP,1,1,1.0
 NDISP,3,3,-1.0
*END STEP
*STEP,NLGEOM
 UNLOADING
*STATIC
5.0e-4,1.0e-2,,5.0e-4
*BOUNDARY,OP=NEW
 FACE12,3
 FACE13,2
 FACE16,1
 NDISP,1,1,0.
 NDISP,3,3,0.
*END STEP