*HEADING
 PRESSURIZING OF A FLAT RUBBER PLATE (MAX2)
*NODE
 21,0.0,.25,0.0
 41,7.5,.25,0.0
*NGEN,LINE=P
 21,41,2,,2.142857143,.25
*NGEN
 21,23,1
 23,25,1
 25,27,1
 27,29,1
 29,31,1
 31,33,1
 33,35,1
 35,37,1
 37,39,1
 39,41,1
*ELEMENT,TYPE=MAX2,ELSET=ALLE
  1,21,22,23
  2,23,24,25
  3,25,26,27
  4,27,28,29
  5,29,30,31
  6,31,32,33
  7,33,34,35
  8,35,36,37
  9,37,38,39
 10,39,40,41
*NSET,NSET=CENTER
 21, 
*BOUNDARY
 41,1,2
 CENTER,1,1
*MEMBRANE SECTION,MATERIAL=A1,ELSET=ALLE
 0.5, 
*MATERIAL,NAME=A1
*HYPERELASTIC,N=1
 80.,20.
**
*INITIAL CONDITIONS,TYPE=STRESS, UNBALANCED STRESS=STEP
 ALLE,2.,2.
**
*RESTART,WRITE,FREQUENCY=2
*STEP,NLGEOM,INC=18,UNSYMM=YES
 PRESSURE: 200 LB/SQ IN 
*STATIC,RIKS
 0.01,1.,.00001,0.25,1.,21,2,30.
*DLOAD
 ALLE,P,2.0E+2
**
*MONITOR,NODE=21,DOF=2
*EL PRINT,FREQUENCY=5,ELSET=ALLE
 E, 
 DG, 
 S, 
*EL FILE,FREQUENCY=2
 E, 
 DG, 
 S, 
** 
*OUTPUT,FIELD,FREQ=2
*ELEMENT OUTPUT
E,
S,
**
*NODE FILE,NSET=CENTER
 U,RF,CF
*OUTPUT,FIELD
*NODE OUTPUT,NSET=CENTER
U,RF,CF
*NODE PRINT
 U,RF,CF
**
*END STEP