*HEADING
 Test HYPERELASTIC, MARLOW, WITH *UNIAXIAL TEST DATA
 COMPRESSIBLE, RELAXITION
*PREPRINT, MODEL=YES
*RESTART, WRITE
*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=C3D8H,ELSET=C3D
 1,11,12,13,14,15,16,17,18
**
**
*ELSET, ELSET=EALL
 C3D,
*SOLID SECTION,ELSET=C3D,MATERIAL=poly
 1.0,
**
*MATERIAL,NAME=POLY
*DENSITY
 100., 
*HYPERELASTIC,MARLOW, MODULI = INSTANTANEOUS
*UNIAXIAL TEST DATA, SMOOTH
  0.0, 0.0
  1.5506E5,  0.1338
  2.4367E5,  0.2675
  3.1013E5,  0.3567
  4.2089E5,  0.6242
  5.3165E5,  0.8917
  5.9810E5,  1.1592
  6.8671E5,  1.4268
  8.8608E5,  2.0510
 10.6329E5,  2.5860
 12.4051E5,  3.0318
 16.1709E5,  3.7898
 19.9367E5,  4.3694
 23.4810E5,  4.8153
 27.4684E5,  5.1720
 31.0127E5,  5.4395
 34.5570E5,  5.7070
 38.3228E5,  5.9299
 42.0886E5,  6.0637
 45.6329E5,  6.1975
 49.3987E5,  6.3312
 53.1646E5,  6.4650
 56.9304E5,  6.5541
 64.2405E5,  6.6433
*VOLUMETRIC TEST DATA
 0.0, 1.0000
60.E5,  .9703
118.2E5,.9412
175.2E5,.9127
231.1E5,.8847
*VISCOELASTIC,TIME=RELAXATION TEST DATA
*COMBINED TEST DATA,SHRINF=0.50,VOLINF=0.50
 0.99256 , 0.99256 , 0.10000    
 0.98525 , 0.98525 , 0.20000    
 0.97805 , 0.97805 , 0.30000    
 0.96402 , 0.96402 , 0.50000    
 0.93730 , 0.93730 , 0.90000    
 0.88886 , 0.88886 , 1.7000     
 0.80894 , 0.80894 , 3.3000     
 0.69864 , 0.69864 , 6.5000     
 0.58776 , 0.58776 , 12.900     
 0.52060 , 0.52060 , 25.700     
 0.50149 , 0.50149 , 51.300     
 0.50011 , 0.50011 , 76.900     
 0.50001 , 0.50001 , 100.00 
*EQUATION
 2,
 FACE14,1,1,NDISP1,1,-1
*NSET, NSET=NDISP
 NDISP1,
*BOUNDARY
 FACE11,3
 FACE13,2
 FACE16,1
**
*STEP, NLGEOM=YES
 UNIAXIAL LOADING
*STATIC
 0.01, 1.0, , 0.05
*CLOAD
 NDISP,1,65.0E5
*OUTPUT,FIELD, VARIABLE=PRESELECT
*OUTPUT, HISTORY
*NODE OUTPUT,Nset=ndisp1
CF1,U1
*ELEMENT OUTPUT,ELSet=eall
NE11,
*ENERGY OUTPUT,VAR=preselect
*END STEP
*STEP, NLGEOM
 SUSTAIN LOAD
*VISCO
 5.,100.,2.,10.,
*END STEP