*HEADING
3D BEAM WITH PIPE SECTION LOADED AXIALLY
*PREPRINT
*NODE,NSET=NALL
1,-5.7735,-5.7735,-5.7735
2, 5.7735,5.7735,5.7735
*ELEMENT,TYPE=B31,ELSET=EL
1,1,2
*BEAM SECTION, MATERIAL=ELASTIC,SECTION=PIPE,ELSET=EL
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
**
*NSET, NSET=QA_TEST_ALLNODES
NALL, 
*TIME POINTS, NAME=TIME-PTS-1,GEN
0,0.2,0.02
*TIME POINTS, NAME=TIME-PTS-2,GEN
0,0.1,0.01
**
*STEP
*DYNAMIC,EXPLICIT,FIXED
 ,0.2
*BULK VISCOSITY
0., 
*BOUNDARY,AMPLITUDE=SMOOTH
 1,1,3,-0.057735
 2,1,3, 0.057735
 NALL,4,6
*MONITOR,DOF=1,NODE=1
***OUTPUT,HISTORY,TIME INTERVAL=0.
***NODE OUTPUT,NSET=NALL
**U,
***ELEMENT OUTPUT,ELSET=EL
**SE,SF,ERV
***ENERGY OUTPUT
**ALLIE,ALLWK,ALLVD,ETOTAL,ALLKE
*FILE OUTPUT, NUMBER=4,TIMEMARKS=YES
*NODE FILE
U,
*ENERGY FILE
*OUTPUT, FIELD, NUMBER INTERVAL=4, TIMEMARKS=YES
*NODE OUTPUT, NSET=QA_TEST_ALLNODES
U,
*OUTPUT,FIELD,VARIABLE=PRESELECT,TIME POINTS=TIME-PTS-1
*OUTPUT,HISTORY,VARIABLE=PRESELECT,TIMEINT=0.005
*END STEP
*STEP
*DYNAMIC,EXPLICIT,FIXED
 ,0.1
*BOUNDARY,OP=NEW
 NALL,4,6
*MONITOR,DOF=1,NODE=1
*FILE OUTPUT, NUMBER=4,TIMEMARKS=YES
*NODE FILE
U,
*ENERGY FILE
*OUTPUT, FIELD, NUMBER INTERVAL=4, TIMEMARKS=YES
*NODE OUTPUT, NSET=QA_TEST_ALLNODES
U,
*OUTPUT,FIELD,VARIABLE=PRESELECT,TIME POINTS=TIME-PTS-2
*OUTPUT,HISTORY,VARIABLE=PRESELECT,TIMEINT=0.025
*END STEP
*STEP
*DYNAMIC,EXPLICIT,FIXED
 ,0.2
**
** Return BULK VISCOSITY to default value
**
*BULK VISCOSITY
 0.06, 
*MONITOR,DOF=1,NODE=1
*FILE OUTPUT, NUMBER=4,TIMEMARKS=YES
*NODE FILE
U,
*ENERGY FILE
*OUTPUT, FIELD, NUMBER INTERVAL=4, TIMEMARKS=YES
*NODE OUTPUT, NSET=QA_TEST_ALLNODES
U,
*OUTPUT,FIELD,VARIABLE=PRESELECT,TIME POINTS=TIME-PTS-1
*OUTPUT,HISTORY,VARIABLE=PRESELECT,TIMEINT=0.01
*END STEP