*HEADING
 PRESSURIZED RUBBER DISC --- CAX4R ELEMENTS
*NODE,NSET=NOUT
1,0.0,0.0
11,7.5,0.0
21,0.0,.25
31,7.5,.25
41,0.0,.5
51,7.5,.5
101,10.,0.
102,20.,0.
103,20.,10.
104,10.,10.
*NODE,NSET=REF
999,0.0,0.0
*NGEN,LINE=P
1,11,1,,2.142857143,0
21,31,1,,2.142857143,.25
41,51,1,,2.142857143,.5
*NSET,NSET=CENTER
1,21,41
*ELEMENT,TYPE=CAX4R,ELSET=ALL
1,1,2,22,21
*ELGEN,ELSET=ALL
1,10,1,1,2,20,20
*ELSET,ELSET=BOTTOM,GEN
1,10,1
*BOUNDARY
31,1,2
CENTER,XSYMM
*EQUATION
2, 
51,1,1.0,11,1,1.0
2, 
51,2,1.0,11,2,1.0
*SOLID SECTION,ELSET=ALL,MATERIAL=A1
*MATERIAL,NAME=A1
*DENSITY
1.E-4, 
*HYPERELASTIC,N=1
80.,20.,
*ELSET, ELSET=CAVSURF, GENERATE
  1,  10,   1
*SURFACE, TYPE=ELEMENT, NAME=FLSURF
CAVSURF, S1
*PHYSICAL CONSTANTS,ABSOLUTE ZERO=-273.16, UNIVERSAL GAS CONSTANT=73.562
*FLUID CAVITY, NAME=CHAMBER, REF NODE=999, BEHAVIOR=GAS, SURFACE=FLSURF, AMBIENT PRESSURE=14.7

*FLUID BEHAVIOR, NAME=GAS
*MOLECULAR WEIGHT
0.01367
*CAPACITY, TYPE=TABULAR
112.847
*AMPLITUDE,NAME=RAMP
0.,0., .01,1.
**
*STEP
*DYNAMIC,EXPLICIT
,0.01
*BOUNDARY,AMP=RAMP
999,8,8,46.0
*MONITOR,NODE=21,DOF=2
*OUTPUT,FIELD,VAR=PRESELECT,NUM=5
**
** Output for qa testing
**
*NSET,NSET=QA_TEST
NOUT,
*FILE OUTPUT,NUMBER INTERVAL=1
*NODE FILE
 U, 
*OUTPUT,FIELD,NUMBER INTERVAL=1
*NODE OUTPUT,NSET=QA_TEST
 U,
*OUTPUT,HISTORY,VAR=PRESELECT,TIME INTERVAL=0.0025
**
*END STEP