*HEADING
 PRESSURIZING OF A FLAT RUBBER PLATE (MAX1)
*NODE
 21,0.0,.25,0.0
 31,7.5,.25,0.0
*NGEN,LINE=P
 21,31,1,,2.142857143,.25
*ELEMENT,TYPE=MAX1
 1,21,22
*ELGEN,ELSET=ALLE
 1,10,1,1
*NSET,NSET=CENTER
 21, 
*BOUNDARY
 31,1,2
 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