*HEADING
: NAFEMS TEST 3, three-layer sandwich shell under
normal pressure loading [S8R]
*NODE
1, 
9,5.
81,0.,5.
89,5.,5.
*NGEN,NSET=BOT
1,9,1
*NGEN,NSET=TOP
81,89,1
*NSET,NSET=LEFT,GEN
1,81,10
*NSET,NSET=RIGHT,GEN
9,89,10
*NFILL,NSET=NALL
BOT,TOP,8,10
*ELEMENT,TYPE=S8R,ELSET=ELALL
1,1,3,23,21,2,13,22,11
*ELGEN,ELSET=ELALL
1,4,2,2,4,20,20
*ELSET,ELSET=OUTPUT
23,67
*SHELL SECTION,ELSET=ELALL,COMPOSITE
.028,3,FACE
.75,3,CORE
.028,3,FACE
*MATERIAL,NAME=FACE
*ELASTIC,TYPE=LAMINA
10.E6,4.E6,.3,1.875E6,1.875E6,1.875E6
*MATERIAL,NAME=CORE
*ELASTIC,TYPE=LAMINA
10.,10.,0.,10.,3.E4,1.2E4
*BOUNDARY
BOT,1
BOT,3
BOT,5
TOP,2
TOP,4
LEFT,2,4
RIGHT,1
RIGHT,5
**
*STEP
*STATIC
*DLOAD
ELALL,P,100
*EL FILE,ELSET=OUTPUT,POSITION=AVERAGED AT NODES
1,2,3,4,5,6,7,8,9
S, 
*END STEP