*HEADING
3D BEAM WITH ARBITRARY CLOSED SECTION LOADED IN TORSION
*PREPRINT
*NODE,NSET=NALL
1,-5.7735,-5.7735,-5.7735,-5.7735,5.7735,0.
2,  5.7735, 5.7735, 5.7735,-5.7735,5.7735,0.
*ELEMENT,TYPE=B31,ELSET=EL
1,1,2
*TRANSFORM,NSET=NALL
5.7735,5.7735,5.7735,-5.7735,5.7735,0.
*BEAM SECTION, MATERIAL=ELASTIC,SECTION=ARBITRARY,ELSET=EL
4,0.0,1.0,0.0,0.0,0.1
1.0,0.0,0.1
1.0,1.0,0.1
0.0,1.0,0.1
*MATERIAL, NAME=ELASTIC
*ELASTIC,TYPE=ISOTROPIC
2.0E11,0.3
*DENSITY
7.8E3, 
*AMPLITUDE,NAME=SMOOTH,DEFINITION=SMOOTH STEP
0.0,0.0,0.2,1.0
*STEP
*DYNAMIC,EXPLICIT,FIXED
 ,0.2
*BULK VISCOSITY
0., 
*BOUNDARY,AMPLITUDE=SMOOTH
 1,4,4,-0.01
 2,4,4, 0.01
 NALL,1,3
 NALL,5,6
*MONITOR,DOF=1,NODE=1
***OUTPUT,HISTORY,TIME INTERVAL=0.
***NODE OUTPUT,NSET=NALL
**U,UR1,UR2,UR3
***ELEMENT OUTPUT,ELSET=EL
**SE,SF,ERV
***ENERGY OUTPUT
**ALLKE,ALLIE,ALLWK,ALLVD,ETOTAL
*FILE OUTPUT, NUMBER=4,TIMEMARKS=YES
*NODE FILE
U,
*ENERGY FILE
*elset,elset=QA_TEST
1
*output,field,variable=pre
*OUTPUT, FIELD, NUMBER INTERVAL=1, TIMEMARKS=YES
*element OUTPUT, Elset=QA_TEST
LE
*OUTPUT,HISTORY,TIME INTERVAL=0.2
*ENERGY OUTPUT, VAR=ALL
*END STEP
*STEP
*DYNAMIC,EXPLICIT,FIXED
 ,0.1
*BOUNDARY,OP=NEW
 NALL,1,3
 NALL,5,6
*MONITOR,DOF=1,NODE=1
*END STEP
*STEP
*DYNAMIC,EXPLICIT,FIXED
 ,0.2
**
** Return BULK VISCOSITY to default value
**
*BULK VISCOSITY
 0.06, 
*MONITOR,DOF=1,NODE=1
*END STEP