*HEADING
: TWISTED RIBBON TEST FOR SHELLS  [S4]
*PREPRINT,ECHO=YES,HISTORY=NO,MODEL=NO
*NODE
*ELEMENT,TYPE=S4, ELSET=EALL
*NSET,NSET=CLAMP
*BOUNDARY
CLAMP,1,5
*MATERIAL,NAME=SHELL
*ELASTIC
1E7,0.25
*SHELL SECTION,MAT=SHELL, ELSET=EALL
0.05,
*NSET,NSET=NDISP
*STEP,PERTURB
*STATIC
*CLOAD
2,3,-1.0
3,3, 1.0
12,3,-1.0
13,3, 1.0
22,3,-1.0
23,3, 1.0
32,3,-1.0
33,3, 1.0
*ENERGY FILE
*NODE FILE
 U,
 COORD,
*NODE PRINT
 U,
 COORD,
*EL PRINT,FREQUENCY=0
*OUTPUT,HISTORY,FREQUENCY=1
*NODE OUTPUT,NSET=NDISP
 U,
 COORD,
*END STEP