*HEADING
 FRICTIONAL CONTACT BETWEEN A DEFORMABLE BLOCK OF CPE3 ELEMENTS AND
 AN ANALYTICAL RIGID SURFACE WITH THE COULOMB FRICTION MODEL AND TANGENTIAL
 SOFTENING
**
** DEFORMABLE ELEMENT
**
*NODE,NSET=DELEM
*ELEMENT,TYPE=CPE3,ELSET=DELEM
*SOLID SECTION, ELSET=DELEM, MATERIAL=STUFF
 1.,
*MATERIAL, NAME=STUFF
*ELASTIC
 3.E7,0.33
*DENSITY
 7.3E-4,
**
** RIGID SURFACE
**
*NODE,NSET=RMASS
*ELEMENT,TYPE=MASS,ELSET=RMASS
*MASS,ELSET=RMASS
1.0,
*RIGID BODY,REF NODE=201,ANALYTICAL SURFACE=RSURF
**
*NSET,NSET=NLOAD
*BOUNDARY
201,1,2
201,6,6
*INITIAL CONDITIONS,TYPE=VELOCITY
DELEM,1,200.0
DELEM,2,0.0
*INITIAL CONDITIONS,TYPE=STRESS
101,0.0,-2000.0
102,0.0,-2000.0
*NSET, NSET=ODB_NSET
DELEM, RMASS, NLOAD
**
** ANALYTICAL RIGID SURFACE
**
*SURFACE, TYPE=SEGMENT, NAME=RSURF
START, -7,  0.000
LINE,  5.,  0.000
*SURFACE,NAME=DEFORM
101,S1
**
*STEP
*DYNAMIC,EXPLICIT
,0.001
*SURFACE INTERACTION,NAME=RSUR_PM
*FRICTION, SHEAR TRACTION SLOPE=1.0E+4
0.15,
*CONTACT PAIR,INTERACTION=RSUR_PM
DEFORM,RSURF
*DLOAD
102,P2,2000.0
**
** Output requests (QA_TEST)
**
*OUTPUT, FIELD, NUMBER INTERVAL=4, TIMEMARKS=YES
*NODE OUTPUT
 U,
**
*OUTPUT, HISTORY, TIME INTERVAL=2.5E-4
*ENERGY OUTPUT,VARIABLE=PRESELECT
**
*END STEP