*HEADING
: MEMBRANE PATCH TEST  [M3D8R]
*PREPRINT,ECHO=YES,HISTORY=NO,MODEL=NO
*NODE
*NGEN
*ELEMENT,TYPE=M3D8R, ELSET=EALL
*ELSET,ELSET=EL3
*MEMBRANE SECTION,MATERIAL=A1, ELSET=EALL
.001,
*MATERIAL,NAME=A1
*ELASTIC,TYPE=ISOTROPIC
1.E6,.25
*NSET,NSET=SIDES,GENERATE
*STEP,PERTURBATION
*STATIC
*BOUNDARY
10,1,2
20,1,,.24E-3
20,2,,.12E-3
30,1,,.3E-3
30,2,,.24E-3
40,1,,.06E-3
40,2,,.12E-3
50,1,,.12E-3
*OUTPUT,HISTORY,FREQUENCY=1
*ENERGY OUTPUT,VARIABLE=PRESELECT
*ENERGY PRINT
*EL PRINT
 S,
 E,
*EL PRINT,POSITION=NODES
 S,
 E,
*EL PRINT,POSITION=AVERAGED AT NODES
 S,
 E,
*EL PRINT,POSITION=CENTROID
 S,
 E,
*OUTPUT,FIELD
*ELEMENT OUTPUT
S,
E,
*END STEP
*STEP,NLGEOM
*STATIC
*CLOAD,FOLLOWER
20, 1, 0.2
30, 1, 0.2
30, 2, 0.4
40, 1,-0.2
40, 2, 0.4
50, 2,-1.6
60, 1, 0.8
70, 2, 1.6
*BOUNDARY
10,1,2
20,2
*ENERGY PRINT
*OUTPUT,HISTORY,FREQUENCY=1
*ENERGY OUTPUT,VARIABLE=PRESELECT
*EL PRINT,SUMMARY=NO,ELSET=EL3
S,E
*OUTPUT,FIELD
*ELEMENT OUTPUT,ELSET=EL3
S,E
*NODE PRINT,SUMMARY=NO
U,RF
*OUTPUT,FIELD
*NODE OUTPUT
U,RF
*END STEP
*STEP,PERTURBATION
*STATIC
*BOUNDARY
10,1,2
20,1,,.24E-3
20,2,,.12E-3
30,1,,.3E-3
30,2,,.24E-3
40,1,,.06E-3
40,2,,.12E-3
50,1,,.12E-3
*ENERGY PRINT
COORD
*OUTPUT,FIELD
*NODE OUTPUT
U,RF,CF,COORD
*OUTPUT,HISTORY,FREQUENCY=1
*ENERGY OUTPUT,VARIABLE=PRESELECT
*ENERGY PRINT
*EL PRINT
 S,
 E,
*EL PRINT,POSITION=NODES
 S,
 E,
*EL PRINT,POSITION=AVERAGED AT NODES
 S,
 E,
*EL PRINT,POSITION=CENTROID
 S,
 E,
*OUTPUT,FIELD
*ELEMENT OUTPUT
S,
E,
*END STEP