*HEADING
: MEMBRANE PATCH TEST  [M3D3]
*PREPRINT,ECHO=YES,HISTORY=NO,MODEL=NO
*NODE
*NGEN
*ELEMENT,TYPE=M3D3, 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
*ENERGY PRINT
*NODE PRINT
 U,
*NODE FILE
 U,
*OUTPUT, HISTORY, FREQ=1
*ENERGY OUTPUT, VARIABLE=ALL
*OUTPUT, FIELD, FREQ=1
*ELEMENT OUTPUT, POSITION=CENTROID, ELSET=EL3
 S,
*NODE OUTPUT
 U,
*END STEP
*STEP,NLGEOM
*STATIC
*CLOAD,FOLLOWER
20, 1, 0.6
30, 1, 0.6
30, 2, 1.2
40, 1,-0.6
40, 2, 1.2
*BOUNDARY
10,1,2
20,2
*ENERGY PRINT
*EL PRINT,SUMMARY=NO,ELSET=EL3
 S,
*NODE PRINT,SUMMARY=NO
 U,RF
*NODE FILE
 U,RF
*OUTPUT, HISTORY, FREQ=1
*ENERGY OUTPUT, VARIABLE=ALL
*OUTPUT, FIELD, FREQ=1
*ELEMENT OUTPUT, ELSET=EL3
 S,
*NODE OUTPUT
 U,RF
*END STEP