*HEADING
 IMPORT ROLLING TIRE: HALF-SYMMETRIC MODEL
 UNITS: KG, M
*RESTART,WRITE,FREQ=100
*NODE,NSET=ROAD
*NODE
*ELEMENT,ELSET=ROAD,TYPE=R3D4
*RIGID BODY,REF NODE=99999,ELSET=ROAD
*SYMMETRIC MODEL GENERATION,REVOLVE,ELEMENT=500,
NODE=500,TRANSPORT
*SYMMETRIC RESULTS TRANSFER, STEP=1
*ELSET,ELSET=FOOT,GEN
*SURFACE,NAME=SROAD,TYPE=ELEMENT
ROAD, SPOS
*SURFACE,NAME=STREAD
 FOOT, S3
*CONTACT PAIR,INTERACTION=SRIGID
 STREAD, SROAD
*SURFACE INTERACTION,NAME=SRIGID
*FRICTION
 0.0,
*NSET,NSET=SYM1
**
** NODE SETS ASYMA,ASYMB,ASYMC, and ASYMD
** USED FOR ANTI_SYMMETRY BC's
**
*NSET,NSET=ASYMA,GENERATE,UNSORTED
*NSET,NSET=ASYMB,GENERATE,UNSORTED
*NSET,NSET=ASYMC,GENERATE,UNSORTED
*NSET,NSET=ASYMD,GENERATE,UNSORTED
*EQUATION
 ASYMA, 1, 1.0, ASYMB, 1,  1.0
*EQUATION
 ASYMA, 2, 1.0, ASYMB, 2,  1.0
*EQUATION
 ASYMC, 3, 1.0, ASYMD, 3, -1.0
********************************************
*STEP,INC=100,NLGEOM=YES
 1:  BRING TRANSFERRED RESULTS TO EQUILIBRIUM
*STATIC,DIRECT
 1.0, 1.0
*BOUNDARY,OP=NEW
 RIM,  1, 6
 ROAD, 1, 6
 SYM1, 1, 2
*DSLOAD,OP=NEW
 INSIDE, P, 200.E3
*NODE PRINT,FREQ=0
*EL PRINT,FREQ=0
*OUTPUT,FIELD,FREQ=1
*ELEMENT OUTPUT
 S,LE
*NODE OUTPUT
 U
*CONTACT OUTPUT,VAR=PRE
*OUTPUT,HISTORY,FREQ=1
*NODE OUTPUT, NSET=ROAD
 U, RF, UR1,UR2,UR3,RM1,RM2,RM3
*NODE OUTPUT, NSET=RIM
 U, RF, UR1,UR2,UR3,RM1,RM2,RM3
*ENERGY OUTPUT,VAR=PRE
*END STEP
******************************************
*STEP,INC=100,NLGEOM=YES
 2:  FOOTPRINT (DISPLACEMENT CONTROLLED)
*STATIC
 0.2, 1.0
*BOUNDARY,OP=NEW
 RIM,  1, 6
 ROAD, 1, 2
 ROAD, 4, 6
 SYM1, 1, 2
 ROAD, 3, , 0.02
*END STEP
****************************************
*STEP,INC=100,NLGEOM=YES
 3:  FOOTPRINT (LOAD CONTROLLED)
*STATIC
 1.0, 1.0
*BOUNDARY,OP=NEW
 RIM,  1, 6
 ROAD, 1, 2
 ROAD, 4, 6
 SYM1, 1, 2
*CLOAD, OP=NEW
 ROAD, 3, 1650.
*END STEP