*HEADING
 EXAMPLE: SLIDER MECHANISM WITH SLIP RATE DEPENDENT FRICTION
 AXISYMMETRIC MODEL, STATIC & DYNAMIC ANALYSIS, COULOMB FRICTION MODEL
*RESTART,WRITE,FREQ=0
**
** NODE GENERATION FOR THE ROD
**
*NODE,NSET=NROD
   1, 0.7500,  0.0
  13, 0.7500, 12.0
 101, 0.8333,  0.0
 113, 0.8333, 12.0
 201, 0.9166,  0.0
 213, 0.9166, 12.0
 301, 1.0000,  0.0
 313, 1.0000, 12.0
*NGEN,NSET=NIN
 1,13,1
*NGEN,NSET=NOUT
 301,313,1
*NFILL, NSET=NROD
 NIN,NOUT,3,100
*NSET, NSET=NBOT
 1, 101, 201, 301
*NSET, NSET=NTOP
 13, 113, 213, 313
**
** NODE GENERATION FOR THE SLIDER
**
*NODE, NSET=NSLIDER
 501, 1.0625, 9.0
 505, 1.0625,11.0
 601, 1.1875, 9.0
 605, 1.1875,11.0
 701, 1.3125, 9.0
 705, 1.3125,11.0
 801, 1.4375, 9.0
 805, 1.4375,11.0
 901, 1.5625, 9.0
 905, 1.5625,11.0
*NGEN,NSET=NSLIN
 501,505,1
*NGEN,NSET=NSLOUT
 901,905,1
*NSET, NSET=NMOVE
 NSLOUT,
*NFILL, NSET=NSLIDER
 NSLIN,NSLOUT,4,100
**
** NODE GENERATION FOR THE COMPOUND MATERIAL
** 
*NODE, NSET=NCOMPOUND
 1001, 1.0000, 9.1
 1013, 1.0000,10.9
 1101, 1.0221, 9.1
 1113, 1.0221,10.9
 1201, 1.0443, 9.1
 1213, 1.0443,10.9
 1301, 1.0664, 9.1
 1313, 1.0664,10.9
*NGEN,NSET=NCIN
 1001, 1013, 1
*NGEN,NSET=NCOUT
 1301, 1313, 1
*NFILL,NSET=NCOMPOUND
 NCIN, NCOUT, 3, 100
*NSET,NSET=NHOLD
 1101,1201,1121,1221
*NSET,NSET=NALL
 NROD, 
 NSLIDER, 
 NCOMPOUND,
**
** ELEMENT DEFINIONS
**
*ELEMENT,TYPE=CAX4
   1, 1, 101, 102, 2
 200, 501, 601, 602, 502
 500, 1001, 1101, 1102, 1002
*ELGEN,ELSET=ROD
   1, 12, 1, 1, 3, 100, 40
*ELGEN,ELSET=RING
 200, 4 , 1, 1, 4, 100, 10
*ELGEN, ELSET=COMPOUND
 500, 12, 1, 1, 3, 100, 20
*ELSET, ELSET=STEEL
 ROD, RING,
**
** CONTACT surfaceS
**
*ELSET, ELSET=E1, GEN
 81, 92, 1
*ELSET, ELSET=E2, GEN
 200, 203, 1
*ELSET, ELSET=E3, GEN
 500, 511, 1
*ELSET, ELSET=E4, GEN
 540, 551, 1
*surface,NAME=ROD
 E1,S2
*surface,NAME=SLIDER
 E2,S4
*surface, NAME=COMP1
 E3,S4
*surface, NAME=COMP2
 E4,S2
*CONTACT PAIR, INTERACTION=I1
 COMP1, ROD
*CONTACT PAIR, INTERACTION=I2, SMALL SLIDING
 COMP2, SLIDER
**
** SURFACE INTERACTION DEFINITION
**
*SURFACE INTERACTION,NAME=I1
*SURFACE INTERACTION,NAME=I2
*SURFACE BEHAVIOR, NO SEPARATION
**
** SOLID SECTION AND MATERIAL PROPERTY DEFINITIONS
**
*SOLID SECTION,ELSET=STEEL,MATERIAL=STEEL
*MATERIAL,NAME=STEEL
*ELASTIC
 30.E6,0.3
*DENSITY
 0.73e-3,
*SOLID SECTION,ELSET=COMPOUND,MATERIAL=COMPOUND
*MATERIAL,NAME=COMPOUND
*ELASTIC
 1.E6,0.2
*DENSITY
 0.1e-3,
**
** AMPLITUDE DEFINITIONS
**
*AMPLITUDE, NAME=AMPDISP, DEFINITION=PERIODIC
 1, 0.6283, 0.0, -4.0
 4.0, 0.0
**
** CONTACT INTERFERENCE STEP
**
*STEP,NLGEOM
 CONTACT INTERFERENCE
*STATIC
 0.25,1.0
*CONTACT INTERFERENCE, TYPE=CONTACT PAIR
 COMP2, SLIDER, 0.004
*BOUNDARY
 NTOP,   1, 2, 0.0
 NBOT,   1, 2, 0.0
 NSLOUT, 1, 2, 0.0
 NHOLD,  2, 2, 0.0
*PRINT,CONTACT=YES
*EL PRINT,FREQ=0
*NODE PRINT,FREQ=0
*CONTACT PRINT,SLAVE=COMP1
*CONTACT PRINT,SLAVE=COMP2
*CONTACT FILE,SLAVE=COMP1,F=0
*END STEP
**
** CHANGE FRICTION MODEL AND REMOVE CONTACT INTERFERENCE
**
*STEP, NLGEOM, UNSYMM=YES
 ADD FRICTION TO MODEL
*STATIC
 0.25,1.0
*CONTACT INTERFERENCE, OP=NEW
*CHANGE FRICTION, INTERACTION=I1
*FRICTION
 0.2500     , 0.00000
 0.24087    , 0.05000
 0.23222    , 0.10000    
 0.22407    , 0.15000    
 0.21639    , 0.20000    
 0.20917    , 0.25000    
 0.20236    , 0.30000    
 0.19595    , 0.35000    
 0.18991    , 0.40000    
 0.18422    , 0.45000    
 0.17886    , 0.50000    
 0.17382    , 0.55000    
 0.16906    , 0.60000    
 0.16459    , 0.65000    
 0.16037    , 0.70000    
 0.15640    , 0.75000    
 0.15266    , 0.80000    
 0.14914    , 0.85000    
 0.14583    , 0.90000    
 0.14270    , 0.95000    
 0.13976    ,  1.0000    
 0.13699    ,  1.0500    
 0.13438    ,  1.1000    
 0.13192    ,  1.1500    
 0.12960    ,  1.2000    
 0.12742    ,  1.2500    
 0.12537    ,  1.3000    
 0.12343    ,  1.3500    
 0.12161    ,  1.4000    
 0.11990    ,  1.4500    
 0.11828    ,  1.5000    
 0.11676    ,  1.5500    
 0.11532    ,  1.6000    
 0.11397    ,  1.6500    
 0.11270    ,  1.7000    
 0.11150    ,  1.7500    
 0.11038    ,  1.8000    
 0.10931    ,  1.8500    
 0.10831    ,  1.9000    
 0.10737    ,  1.9500    
 0.10648    ,  2.0000    
 0.10565    ,  2.0500    
 0.10486    ,  2.1000    
 0.10412    ,  2.1500    
 0.10342    ,  2.2000    
 0.10276    ,  2.2500    
 0.10214    ,  2.3000    
 0.10156    ,  2.3500    
 0.10101    ,  2.4000    
 0.10049    ,  2.4500    
 0.10000    ,  2.5000    
 9.95433E-02,  2.5500    
 9.91107E-02,  2.6000    
 9.87033E-02,  2.6500    
 9.83196E-02,  2.7000    
 9.79582E-02,  2.7500    
 9.76178E-02,  2.8000    
 9.72972E-02,  2.8500    
 9.69953E-02,  2.9000    
 9.67109E-02,  2.9500    
 9.64431E-02,  3.0000    
 9.61908E-02,  3.0500    
 9.59532E-02,  3.1000    
 9.57294E-02,  3.1500    
 9.55187E-02,  3.2000    
 9.53202E-02,  3.2500    
 9.51332E-02,  3.3000    
 9.49571E-02,  3.3500    
 9.47913E-02,  3.4000    
 9.46351E-02,  3.4500    
 9.44879E-02,  3.5000    
 9.43494E-02,  3.5500    
 9.42189E-02,  3.6000    
 9.40960E-02,  3.6500    
 9.39802E-02,  3.7000    
 9.38712E-02,  3.7500    
 9.37685E-02,  3.8000    
 9.36717E-02,  3.8500    
 9.35806E-02,  3.9000    
 9.34948E-02,  3.9500    
 9.34140E-02,  4.0000    
 9.33379E-02,  4.0500    
 9.32662E-02,  4.1000    
 9.31987E-02,  4.1500    
 9.31351E-02,  4.2000    
 9.30752E-02,  4.2500    
 9.30188E-02,  4.3000    
 9.29657E-02,  4.3500    
 9.29157E-02,  4.4000    
 9.28685E-02,  4.4500    
 9.28242E-02,  4.5000    
 9.27824E-02,  4.5500    
 9.27430E-02,  4.6000    
 9.27059E-02,  4.6500    
 9.26710E-02,  4.7000    
 9.26381E-02,  4.7500    
 9.26071E-02,  4.8000    
 9.25779E-02,  4.8500    
 9.25504E-02,  4.9000    
 9.25245E-02,  4.9500    
 9.25002E-02,  5.0000    
 9.24772E-02,  5.0500    
 9.24556E-02,  5.1000    
 9.24352E-02,  5.1500    
 9.24160E-02,  5.2000    
 9.23979E-02,  5.2500    
 9.23809E-02,  5.3000    
 9.23649E-02,  5.3500    
 9.23498E-02,  5.4000    
 9.23356E-02,  5.4500    
 9.23222E-02,  5.5000    
 9.23096E-02,  5.5500    
 9.22977E-02,  5.6000    
 9.22865E-02,  5.6500    
 9.22760E-02,  5.7000    
 9.22660E-02,  5.7500    
 9.22567E-02,  5.8000    
 9.22479E-02,  5.8500    
 9.22396E-02,  5.9000    
 9.22318E-02,  5.9500    
 9.22244E-02,  6.0000    
 9.22175E-02,  6.0500    
 9.22110E-02,  6.1000    
 9.22048E-02,  6.1500    
 9.21990E-02,  6.2000    
 9.21936E-02,  6.2500    
 9.21885E-02,  6.3000    
 9.21836E-02,  6.3500    
 9.21791E-02,  6.4000    
 9.21748E-02,  6.4500    
 9.21707E-02,  6.5000    
 9.21669E-02,  6.5500    
 9.21633E-02,  6.6000    
 9.21600E-02,  6.6500    
 9.21568E-02,  6.7000    
 9.21538E-02,  6.7500    
 9.21510E-02,  6.8000    
 9.21483E-02,  6.8500    
 9.21458E-02,  6.9000    
 9.21435E-02,  6.9500    
 9.21412E-02,  7.0000    
 9.21391E-02,  7.0500    
 9.21372E-02,  7.1000    
 9.21353E-02,  7.1500    
 9.21336E-02,  7.2000    
 9.21319E-02,  7.2500    
 9.21304E-02,  7.3000    
 9.21289E-02,  7.3500    
 9.21276E-02,  7.4000    
 9.21263E-02,  7.4500    
 9.21250E-02,  7.5000    
*CHANGE FRICTION, INTERACTION=I2
*FRICTION, LAGRANGE
 100.0,
*BOUNDARY, OP=NEW
 NTOP,   1, 2, 0.0
 NBOT,   1, 2, 0.0
 NMOVE,  1, 2, 0.0
*PRINT,CONTACT=YES
*END STEP
**
** DYNAMIC SLIDING STEP
**
*STEP, NLGEOM, INC=200, UNSYMM=YES, EXTRAP=PARAB
 DYNAMIC SLIDING STEP
*DYNAMIC, HAFTOL=5.0e6, INITIAL=NO,TIMEINTEGR=HHT-TF,IMPACT=AVERAGE TIME,INCREMENTATION=CONS
 0.05,10.0,1.0e-2,0.2
*BOUNDARY, OP=MOD, AMPLITUDE=AMPDISP
 NMOVE, 2, 2, 1.0
*MONITOR,NODE=903, DOF=2
*NODE PRINT, NSET=NMOVE, FREQ=0
*NODE FILE,  NSET=NMOVE, FREQ=0
 RF,
*CONTACT PRINT, FREQ=0, MASTER=ROD, SLAVE=COMP1
 CFN,
 CFS1, CFS2, CFS3, CFSM
*CONTACT FILE,  FREQ=1, MASTER=ROD, SLAVE=COMP1
 CFN,
 CFS,
*OUTPUT, FIELD, FREQ=1
*NODE OUTPUT
 U,
*OUTPUT, HISTORY, FREQ=1
*CONTACT OUTPUT, MASTER=ROD, SLAVE=COMP1
 CFN,
 CFS1, CFS2, CFS3, CFSM
*END STEP
**
** STATIC SLIDING STEP
**
*STEP, NLGEOM, UNSYMM=YES, INC=1000
 STATIC SLIDE STEP
*STATIC
 0.1,10.0,,0.2
*BOUNDARY, OP=MOD, AMPLITUDE=AMPDISP
 NMOVE, 2, 2, 1.0
*MONITOR,NODE=903, DOF=2
*NODE PRINT, NSET=NMOVE, FREQ=0
*NODE FILE,  NSET=NMOVE, FREQ=0
 RF,
*CONTACT PRINT, FREQ=0, MASTER=ROD, SLAVE=COMP1
 CFN,
 CFS1, CFS2, CFS3, CFSM
*CONTACT FILE,  FREQ=1, MASTER=ROD, SLAVE=COMP1
 CFN,
 CFS,
*OUTPUT, FIELD, FREQ=1
*NODE OUTPUT
 U,
*OUTPUT, HISTORY, FREQ=1
*CONTACT OUTPUT, MASTER=ROD, SLAVE=COMP1
 CFN,
 CFS1, CFS2, CFS3, CFSM
*END STEP