*HEADING
SIMPLY SUPPORTED SQUARE PLATE WITH UNIFORM PRESSURE---S3R 4 X 4 MESH
*PREPRINT,ECHO=YES,MODEL=NO,HISTORY=NO
*NODE, NSET=CORNERS
1,   0.,    0.
5,   1.,    0.
401,  0.,    1.
405,  1.,    1.
*NGEN,NSET=BOT
1,5,1
*NGEN,NSET=TOP
401,405,1
*NFILL
BOT,TOP,4,100
*ELEMENT, TYPE=S3R
1, 1, 2,  102
101, 1,  102,  101
3,  3, 4, 103
103, 4,  104,  103
9, 201,  202,  301
109,  202,  302, 301
11,  203,204,304,
111,  203,304,303
*NSET,NSET=SIDES,GENERATE
1,5,1
401,405,1
1,401,100
5,405,100
*NSET,NSET=LFTRT
1,401,100
5,405,100
*NSET,NSET=TOPBOT
1,5,1
401,405,1
*NSET,NSET=CENTND
203, 
*ELGEN,ELSET=ALLELS
1,2,1,1,2,100,4
3,2,1,1,2,100,4
101,2,1,1,2,100,4
103,2,1,1,2,100,4
9,2,1,1,2,100,4
109,2,1,1,2,100,4
11,2,1,1,2,100,4
111,2,1,1,2,100,4
*ELSET,ELSET=CENTER
10,11,110,111,6,7,106,107
*SHELL SECTION,MATERIAL=A1,ELSET=ALLELS
.01,3
*MATERIAL,NAME=A1
*ELASTIC
3.E7,  .3
*BOUNDARY
SIDES,1,3
*STEP
*STATIC
*DLOAD
ALLELS,P,-1.
*NODE PRINT, NSET=CENTND
U, 
*EL PRINT, ELSET=CENTER, POSITION=AVERAGED AT NODES
SF, 
*NODE FILE, NSET=CENTND
U, 
*OUTPUT,FIELD
*NODE OUTPUT,NSET=CENTND
U,
*EL FILE, ELSET=CENTER, POSITION=AVERAGED AT NODES
SF, 
*END STEP