Contact IV

This series of examples shows how to scale the penalty stiffness in contact problems. The influence of this scaling on the solution is shown by the example of a soft ring in contact with a rigid wall. In this first example the penalty factor obviously is to low.

*CONTACT_ONE_WAY_SURFACE_TO_SURFACE
*CONTROL_CPU
*CONTROL_ENERGY
*CONTROL_TERMINATION
*CONTROL_TIMESTEP
*DATABASE_BINARY_D3PLOT
*DATABASE_BINARY_D3THDT
*DATABASE_GLSTAT
*DATABASE_MATSUM
*DATABASE_NODOUT
*DATABASE_RCFORC
*ELEMENT_SHELL
*END
*INITIAL_VELOCITY_GENERATION
*KEYWORD
*MAT_ELASTIC
*NODE
*PART
*SECTION_SHELL
*TITLE

  *KEYWORD
  *TITLE
  Soft Ring Impacting Rigid Wall (SF=0.01)
  *CONTROL_TERMINATION
   0.0300000         0 0.0000000         0 0.0000000
  *CONTROL_TIMESTEP
   0.0000000 0.0000000         0 0.0000000 0.0000000         0         0         0
  *CONTROL_ENERGY
           1         2         1         1
  *DATABASE_BINARY_D3PLOT
   5.00000-4                   0
  *DATABASE_BINARY_D3THDT
   1.00000-4
  *DATABASE_NODOUT
   1.00000-4
  *DATABASE_GLSTAT
   1.00000-4
  *DATABASE_MATSUM
   1.00000-4
  *DATABASE_RCFORC
   1.00000-4
  *CONTROL_CPU
   0.0000000
  *MAT_ELASTIC
           1 7.85000-8 100.00000 0.0000000
  *MAT_ELASTIC
           2 7.85000-8 100.00000 0.0000000
  *SECTION_SHELL
           1         0 0.0000000 3.0000000 0.0000000 0.0000000
   1.0000000 1.0000000 1.0000000 1.0000000 0.0000000
  *SECTION_SHELL
           2         0 0.0000000 3.0000000 0.0000000 0.0000000
   1.0000000 1.0000000 1.0000000 1.0000000 0.0000000
  *PART
  material type # 1  (elastic)                                                    
           1         1         1         0         0         0         0         0
  *PART
  material type # 1  (elastic)                                                    
           2         2         2         0         0         0         0         0
  *NODE
  $
  *ELEMENT_SHELL
  $
  *INITIAL_VELOCITY_GENERATION
  $       ID      STYP     OMEGA        VX        VY        VZ
           1         2       0.0    2000.0   -1000.0       0.0
  $       XC        YC        ZC        NX        NY        NZ     PHASE
         0.0       0.0       0.0       0.0       0.0       0.0         0
  $ INTERFACE NAME: 1          $$$
  *CONTACT_ONE_WAY_SURFACE_TO_SURFACE              
           1         2         3         3         0         0         0         0
         0.0       0.0       0.0       0.0       0.0         0       0.0       0.0
  $      SFS       SFM       SST       MST      SFST      SFMT       FSF       VSF
        0.01      0.01       0.0       0.0       0.0       0.0       0.0       0.0
  *END