*HEADING
: SIMPLE CONTACT TEST, 3D FINITE SLIDING, FRICTION
*ELEMENT,TYPE=C3D8,ELSET=BASE
1, 1,3,13,11,101,103,113,111
2, 3,5,15,13,103,105,115,113
3, 5,7,17,15,105,107,117,115
*ELEMENT,TYPE=C3D8,ELSET=SLIDER
4, 21,23,33,31,121,123,133,131
*ELSET,ELSET=SOLID
BASE,SLIDER
*NODE,NSET=NALL
1,0.0,0.0
7,7.5,0.0
11,0.0,2.0
17,7.5,2.0
21,0.5,2.1,.25
23,2.25,2.1,.25
31,0.5,4.1,.25
33,2.25,4.1,.25
101,0.0,0.0,2.5
107,7.5,0.0,2.5
111,0.0,2.0,2.5
117,7.5,2.0,2.5
121,0.5,2.1,2.25
123,2.25,2.1,2.25
131,0.5,4.1,2.25
133,2.25,4.1,2.25
*NGEN,NSET=NALL
1,7,2
11,17,2
21,23,2
31,33,2
101,107,2
111,117,2
121,123,2
131,133,2
*NSET,NSET=BOTTOM_NODES,G
1,7,2
101,107,2
*NSET,NSET=TOP_NODES,G
31,33,2
131,133,2
*NMAP,NSET=NALL,TYPE=RECTANGULAR
0,0,0,.8,.0,.6
.48,.6,-.64
*TRANSFORM,NSET=NALL
.8,.0,.6,.48,.6,-.64
*SOLID SECTION, ELSET=SOLID,MATERIAL=STEEL
*surface, NAME=SSLIDE
SLIDER,S3
*surface, NAME=SBASE
BASE,S5
*SURFACE INTERACTION, NAME=FRIC
*FRICTION
0.1, 
*CONTACT PAIR, INTERACTION=FRIC
SSLIDE, SBASE
*MATERIAL,NAME=STEEL
*ELASTIC
 30.E6,0.3
*DENSITY
  7800.00, 
*BOUNDARY
1,1
11,1
101,1
111,1
BOTTOM_NODES,2,3
TOP_NODES,3
*STEP,NLGEOM,INC=20,UNSYMM=YES
 FIRST COMPRESS
*STATIC,DIRECT
0.67,1.
*CONTROLS,PARAMETERS=FIELD
1.0E-6, 
*BOUNDARY
TOP_NODES,1
TOP_NODES,2,2,-.15
*PRINT,CONTACT=YES
*EL PRINT
S, 
E, 
*NODE PRINT
U,
RF,
*OUTPUT,FIELD,FREQ=5
*ELEMENT OUTPUT
S,
E,
*OUTPUT,FIELD,FREQ=5
*NODE OUTPUT
U,RF
*END STEP
*STEP,INC=30,UNSYMM=YES
SLIDE TO THE RIGHT
*STATIC
.2,1.
*CHANGE FRICTION,INTERACTION=FRIC
*FRICTION
0.2, 
*BOUNDARY
TOP_NODES,2,2,-.15
TOP_NODES,1,1,4.
*END STEP
*STEP,UNSYMM=YES
*FREQUENCY, eigensolver=lanczos
3, , 
*OUTPUT,FIELD
*ELEMENT OUTPUT
S,
E,
*END STEP