*HEADING
 SKEW-SENSITIVITY ANALYSIS, 15 DEG TRAPEZOIDAL, C3D20, 1 X 8 MESH 
*NODE,NSET=SIDE1
1,0.,0.
3,.723205,0.
5,1.526795,0.
13,4.526795,0.
15,5.276795,0.
17,6.,0.
401,0.,.1
417,6.,.1
801,0.,.2
803,.776795,.2
805,1.473205,.2
813,4.473205,.2
815,5.276795,.2
817,6.,.2
*NGEN,NSET=SIDE1
3,15,4
5,13,4
803,815,4
805,813,4
401,417,2
1,3
3,5
5,7
7,9
9,11
11,13
13,15
15,17
801,803
803,805
805,807
807,809
809,811
811,813
813,815
815,817
*NCOPY, OLD SET=SIDE1, CHANGE NUMBER=1000, SHIFT
0.,0.,.005

*NCOPY, OLD SET=SIDE1, CHANGE NUMBER=2000, SHIFT
0.,0.,.01

*NSET,NSET=FIX
1,401,801,1001,1801,2001,2401,2801,
*ELEMENT,TYPE=C3D20
1, 1,2001,2003,3, 801,2801,2803,803, 1001,2002,1003,2, 1801,2802,1803,
802, 401,2401,2403,403
*ELGEN,ELSET=EALL
1,8,2,1
*MATERIAL,NAME=A1
*ELASTIC
1.E8,0.
*SOLID SECTION,MATERIAL=A1,ELSET=EALL
*STEP,PERTURBATION
*STATIC
*BOUNDARY
SIDE1,3
FIX,1,3
*CLOAD
17,2,-.25
817,2,-.25
2017,2,-.25
2817,2,-.25
*EL PRINT
COORD, 
S, 
E, 
*NODE FILE
U, 
*OUTPUT,FIELD
*NODE OUTPUT
U,
*END STEP