*HEADING
: Membrane patch test [S4R5]
*PREPRINT,ECHO=YES,HISTORY=NO,MODEL=NO
*NODE,NSET=ALL
10,0,0
20,.24,0.
30,.24,.12
40,0.,.12
102,.04,.02
104,.18,.03
204,.16,.08
202,.08,.08
*NSET,NSET=DRIVE
        10,        20,        30,        40,       102,       104,       202,       204,
*ELEMENT,TYPE=S4R5, ELSET=EALL
1,10,20,104,102
2,10,102,202,40
3,102,104,204,202
4,104,20,30,204
5,202,204,30,40
*ELSET,ELSET=EL3
3,
*ELSET,ELSET=SUBMELEMENTS
1,2,3,4,5
*SHELL SECTION,MATERIAL=A1, ELSET=EALL
.001, 
*MATERIAL,NAME=A1
*ELASTIC,TYPE=ISOTROPIC
1.E6,.25
*NSET,NSET=SIDES,GENERATE
10,40,10
*STEP,PERTURBATION
*STATIC
*BOUNDARY
10,1,2
ALL,3,5
20,1,,.24E-3
20,2,,.12E-3
30,1,,.3E-3
30,2,,.24E-3
40,1,,.06E-3
40,2,,.12E-3
*EL FILE,ELSET=EL3,POS=NODES,FREQ=999
S,
E,
*EL PRINT,ELSET=EL3,FREQ=999
S,
E,
*NODE PRINT,FREQ=999
U,
RF,
*NODE FILE,NSET=DRIVE,FREQ=2
U,
*END STEP