*HEADING
 SKEW-SENSITIVITY ANALYSIS, 0 DEG, C3D20R, 1 X 8 MESH              
*NODE
1,0.,0.,0.
17,6.,0.,0.
801,0.,0.,.2
817,6.,0.,.2
2001,0.,0.01,0.
2017,6.,0.01,0.
2801,0.,0.01,.2
2817,6.,0.01,.2
*NGEN,NSET=FIX1
1,801,100
*NGEN,NSET=FIX2
2001,2801,100
*NFILL,NSET=FIX
FIX1,FIX2,2,1000
*NGEN,NSET=END1
17,817,100
*NGEN,NSET=END2
2017,2817,100
*NFILL,NSET=END
END1,END2,2,1000
*NFILL
FIX,END,16,1
*NSET,NSET=PLNE,GENERATE
1,17,1
401,417,1
801,817,1
*ELEMENT,TYPE=C3D20R
1, 1,3,2003,2001, 801,803,2803,2801, 2,1003,2002,1001, 802,1803,2802,
1801, 401,403,2403,2401
*ELGEN,ELSET=EALL
1,8,2,1
*MATERIAL,NAME=A1
*ELASTIC
1.E8,0.
*SOLID SECTION,MATERIAL=A1,ELSET=EALL
*STEP,PERTURBATION
*STATIC
*BOUNDARY
FIX,1,3
PLNE,2,2
*CLOAD
17,3,-.25
817,3,-.25
2017,3,-.25
2817,3,-.25
*EL PRINT
COORD, 
S, 
E, 
*NODE FILE
U, 
*OUTPUT,FIELD
*NODE OUTPUT
U,
*END STEP