*HEADING
HERTZ CONTACT PROBLEM - DISPLACEMENT CONTROL, CPE6M
*NODE,NSET=REFNODE
*NODE,NSET=RIGID
*NODE,NSET=NALL
*ELEMENT,TYPE=CPE6M ,ELSET=CYLINDER
*ELSET,ELSET=BOT
*ELEMENT,TYPE=R2D2, ELSET=RIGID
*NSET,NSET=LEFT1,GEN
*NSET,NSET=LEFT
LEFT1, 288
*AMPLITUDE,NAME=SMOOTH,DEFINITION=SMOOTH STEP
0.0,0.0,0.01,1.0,
*SECTION CONTROL, NAME=YY
*SOLID SECTION,ELSET=CYLINDER,MATERIAL=A1, CONTROL=YY
*MATERIAL,NAME=A1
*ELASTIC
 30.E6,.3
*DENSITY
 7.5E-4,
**
*NSET,NSET=TOP,GENERATE
*NSET, NSET=CONTACT
*NSET,NSET=OUTFIL,GENERATE
**
*SURFACE,TYPE=ELEMENT,NAME=RIGSUR
RIGID,SPOS
*SURFACE,TYPE=ELEMENT,NAME=BOTSUR
BOT,S2
*RIGID BODY,ELSET=RIGID,REF NODE=REFNODE
*STEP,NLGEOM=NO
*DYNAMIC,EXPLICIT
,.011
*BOUNDARY
LEFT ,1,1
REFNODE ,1,6
*BOUNDARY,TYPE=DISPLACEMENT, AMPLITUDE=SMOOTH
TOP,2,2,-.4
*CONTACT PAIR,INTERACTION=NO_FRI,SMALL SLIDING
RIGSUR,BOTSUR
*SURFACE INTERACTION,NAME=NO_FRI
**
*RESTART,WRITE,NUMBER=1
**
*OUTPUT,FIELD,VARIABLE=PRESELECT,NUMBER INTERVAL=4
*OUTPUT,FIELD,OP=ADD,NUMBER INTERVAL=4
*CONTACT OUTPUT
CSTRESS, CFORCE
*OUTPUT,HISTORY,TIME INTERVAL=0.00001
*NODE OUTPUT,NSET=TOP
RF,
**
** Output requests for qa testing
**
*NSET,NSET=QA_TEST1
REFNODE,
*NSET,NSET=QA_TEST2
OUTFIL,
*OUTPUT,FIELD,NUMBER INTERVAL=1
*NODE OUTPUT, NSET=QA_TEST1
RF,
*NODE OUTPUT, NSET=QA_TEST2
U,
*OUTPUT,HISTORY,VAR=PRESELECT,TIME INTERVAL=0.00275
*FILE OUTPUT,NUMBER=1
*NODE FILE,NSET=REFNODE
RF,
*NODE FILE,NSET=OUTFIL
U,
*END STEP