*HEADING
 NAFEMS BENCHMARK EXAMPLE 3DNLG-4, ELEMENT STRI65
 LATERAL TORSIONAL BUCKLING OF AN ELASTIC CANTILEVER SUBJECTED TO TRANSVERSE END LOAD
 CONSERVATIVE LOAD CASE
*NODE
*NSET,NSET=FIX,GEN
*NSET,NSET=N311
*ELEMENT,TYPE=STRI65
*ELGEN,ELSET=SHELL
*SHELL SECTION,ELSET=SHELL,MATERIAL=MAT
0.2,
*MATERIAL,NAME=MAT
*ELASTIC
1.0E4,0.0
*BOUNDARY
FIX,1,6
*RESTART, WRITE
*STEP,NLGEOM,INC=50
*STATIC,RIKS
0.0005,1.0,1E-4,0.001,0.02,311,2,0.065
*CLOAD
311,3,-1.0
*EL PRINT,FREQ=0
*NODE PRINT,FREQ=1,NSET=N311
U2,CF3
*NODE FILE,FREQ=1,NSET=N311
U,
CF,
*OUTPUT,FIELD,FREQ=1
*NODE OUTPUT,NSET=N311
U,
CF,
*END STEP