*HEADING
 STATIC INDENTATION OF ELASTOMERIC FOAM 
********************************************************
** Measure the punch reaction force during the following 2 steps:
**     Step 1: Displace punch 200 mm downwards.
**     Step 2: ALE
**     Step 2: Displace punch 50mm further down.
**             (Units: N, mm, sec)
********************************************************
*PREPRINT,MODEL=YES,HISTORY=NO
*RESTART,WRITE
*NODE
   1,   0., 300.
  19,   0.,   0.
 481, 300., 300.
 499, 300.,   0.
 601, 600., 300.
 619, 600.,   0.
*NSET,NSET=N1
 1, 
*NSET,NSET=N19
 19, 
*NSET,NSET=N481
 481, 
*NSET,NSET=N499
 499, 
*NFILL,NSET=TOP,BIAS=.85
 N1,N481,12,40
*NGEN,NSET=TOP
 481,601,40
*NFILL,NSET=BOT,BIAS=.85
 N19,N499,12,40
*NGEN,NSET=BOT
 499,619,40
*NFILL,NSET=ALLN,BIAS=.9
 TOP,BOT,9,2
*NSET,NSET=CENTER,GENERATE
 1,19
*ELEMENT,TYPE=CAX3
  1, 1, 3,43
150, 1,43,41
*ELGEN,ELSET=FOAM
  1,15,40,10,9,2,1
150,15,40,10,9,2,1
*ELSET,ELSET=CENT,GENERATE
 1,141,10
 61,69
*ELSET,ELSET=ETOP,GENERATE
 150,290,10
*ELSET,ELSET=UPPER,GEN
 1,141,10
*NODE,NSET=PUNCH
 1000,0.,510.
*SOLID SECTION,ELSET=FOAM,MATERIAL=FOAM
*ORIENTATION,NAME=RECT,SYSTEM=RECTANGULAR
 1.,0.,0., 0.,1.,0.
 3,0.
****************************************************
*MATERIAL,NAME=FOAM
*HYPERFOAM,N=2,TEST DATA INPUT,POISSON=0.0,MODULI=INSTANTANEOUS
*UNIAXIAL TEST DATA
 -.0217,   -.05
 -.0317,   -.10
 -.0367,   -.15
 -.0402,   -.20
 -.0433,   -.25
 -.0467,   -.30
 -.0504,   -.35
 -.0542,   -.40
 -.0604,   -.45
 -.0668,   -.50
 -.0759,   -.55
 -.0909,   -.60
 -.1083,   -.65
 -.1410,   -.70
 -.1933,   -.75
 -.2896,   -.80
*SIMPLE SHEAR TEST DATA      
  .0140, .08, .0046
  .0334, .16, .0166
  .0533, .24, .0366
  .0853, .32, .0573
  .1280, .40, .0817
  .1653, .48, .1098
  .2080, .56, .1394
  .2560, .64, .1666
  .2987, .72, .1904
*VISCOELASTIC,TIME=RELAXATION TEST DATA
*SHEAR TEST DATA,SHRINF=0.5000
 1.0000, 0.0001
 0.9695, 0.001
 0.9417, 0.002
 0.8722, 0.005
 0.7913, 0.010
 0.7043, 0.020
 0.6233, 0.050
 0.5736, 0.100
 0.5271, 0.200
 0.5013, 0.500
 0.5000, 1.000
*DENSITY
 1.E-11,
****************************************************
*BOUNDARY
 BOT,1,2     
 CENTER,1
 1000,1
 1000,6
****************************************************
*SURFACE,TYPE=SEGMENTS,NAME=IMPACTOR
 START,141.42,641.42
 CIRCL,-1.,300.,0.,500.
*SURFACE,TYPE=ELEMENT,NAME=TARGET
 ETOP,S3
*RIGID BODY,REF NODE=1000,ANALYTICAL SURFACE=IMPACTOR
*CONTACT PAIR,INTERACTION=ROUGH,TYPE=SURFACE
 TARGET,IMPACTOR
*SURFACE INTERACTION,NAME=ROUGH
*FRICTION
 0.8, 
****************************************************
*STEP,NLGEOM,INC=200,AMPLITUDE=RAMP,UNSYMM=YES
 Displace punch 200 mm downwards.
*STATIC
 .0015,1.,,.05
*BOUNDARY
 1000,2,2,-200.
*END STEP
****************************************************
*STEP,NLGEOM,INC=200,AMPLITUDE=RAMP,UNSYMM=YES
ADAPTIVE MESHING
*STATIC
 1.0, 1.0
*Adaptive Mesh, Elset=Foam, Frequency=1, Mesh Sweeps=20
*END STEP
*********************************************************
*STEP,NLGEOM,INC=200,AMPLITUDE=RAMP,UNSYMM=YES
 Displace punch 50 mm further downwards.
*STATIC
 0.1, 1.0
*BOUNDARY
 1000,2,2,-250.
*END STEP