*HEADING
 STIFFNESS PROPORTIONAL MATERIAL DAMPING TEST
 MEMBRANES - HYPERELASTIC 
*NODE
1001,   0., 0., 0.0
1101, 100., 0., 0.0
2001,   0., 0., 1.0
2101, 100., 0., 1.0
*NGEN,NSET=BOTTOM
1001,1101,1
*NGEN,NSET=TOP
2001,2101,1
*NSET,NSET=ALL
BOTTOM,TOP
*NSET,NSET=QA_TEST
ALL,
*ELEMENT,TYPE=M3D4R,ELSET=MEMBRANE
1,1001,1002,2002,2001
*ELGEN,ELSET=MEMBRANE
1,100,1,1
*ELSET,ELSET=QA_TEST
MEMBRANE,
*MEMBRANE SECTION,ELSET=MEMBRANE,MATERIAL=RUBBER, POISSON=MATERIAL
1.0,
*MATERIAL,NAME=RUBBER
*DENSITY
1., 
*HYPERELASTIC,N=1
80.,20.,.03125
*DAMPING,BETA=1.0E-2
*BOUNDARY
ALL,3,3
BOTTOM,2,2
*AMPLITUDE,NAME=PULSE
 .0,  .00000,  .1,  .15644,  .2,  .30902,  .3,  .45399
 .4,  .58778,  .5,  .70711,  .6,  .80902,  .7,  .89101
 .8,  .95106,  .9,  .98769, 1.0, 1.00000, 1.1,  .98769
1.2,  .95106, 1.3,  .89101, 1.4,  .80902, 1.5,  .70711
1.6,  .58778, 1.7,  .45399, 1.8,  .30902, 1.9,  .15644
2.0, 0.00000
*NSET,NSET=NOUT,GENERATE
1001,1101,10
*ELSET,ELSET=EOUT
50,
**
*STEP
*DYNAMIC,EXPLICIT
,100.0
*CLOAD,AMPLITUDE=PULSE
1001,1,1,1.0E6
2001,1,1,1.0E6
*BULK VISCOSITY
0.0,0.0
**
*FILE OUTPUT,NUMBER=2,TIMEMARKS=YES
*EL FILE
 S,LE
*NODE FILE
 U,
********************************************
*OUTPUT,FIELD,NUMBER INTERVAL=2,TIMEMARKS=YES
*ELEMENT OUTPUT,ELSET=QA_TEST
LE
*NODE OUTPUT,NSET=QA_TEST
U
*OUTPUT,HISTORY,TIME INTERVAL=50
*ENERGY OUTPUT, VAR=PRESELECT
**********************
**
*END STEP