*HEADING
SPHERICAL CAVITY, C3D20R, R=1,2,4,8, FX,
*NODE,SYSTEM=S,NSET=IN
*NODE,SYSTEM=S,NSET=OUT
*NGEN,LINE=C,NSET=IN
*NGEN,LINE=C,NSET=OUT
*NFILL, BIAS=.5, TWO STEP
IN,OUT,6,100
*NSET,NSET=XSYM,GENERATE
*NSET,NSET=YSYM,GENERATE
*NSET,NSET=ZSYM,GENERATE
*NSET,NSET=OUTN,GENERATE
*ELEMENT,TYPE=C3D20R,ELSET=ALL
*ELGEN,ELSET=ALL
*ELSET,ELSET=INEL,GENERATE
*SOLID SECTION,ELSET=ALL,MATERIAL=ONE
*MATERIAL,NAME=ONE
*ELASTIC
1.E7,.33
*BOUNDARY
XSYM,1
YSYM,2
ZSYM,3
OUT,PINNED
*STEP
*STATIC
*DLOAD
INEL,P1,750.
*NODE FILE,NSET=OUTN
U,
*OUTPUT,FIELD
*NODE OUTPUT,NSET=OUTN
U,
*END STEP