Input file for dynamic contact

 
****calcul dynamic
  ***mesh updated_lagrangian_plane_strain
  ***resolution
   **sequence
    *time      1.4
    *increment 50
    *algorithm p1p2p3
    *ratio     absolu 1.e-1
    *iteration 8
   **automatic_time epcum 0.01
    *divergence 2. 10
    *security  1.25
  ***bc
   **impose_nodal_dof
     fix U1 0.0
     fix U2 0.0
   **impose_nodal_reaction
     load    exp  U1 -25.0 tab1
   **gravity ball d2 -9.81 tab2
  ***table
   **name tab1
    *time  0. 0.2
    *value 0. 1. 
   **name tab2
    *time  0. 0.1   1.e20
    *value 0. 1.    1.
  ***contact % soft
    **soft_param 1.e3 6.0 1.e-8
    **zone
      *impactor impact
      *target   target
      *friction 0.5
      *gap      1.e-9
      *warning_distance 0.2
    **zone     
      *impactor impact
      *target   target2
      *friction 0.5
      *gap      1.e-9
      *warning_distance 0.2
    **conv 1.e-6 2000
  ***output
   **contour
   **curve
    *node_var look U1 U2
    *node_var load U1 U2
   **component sig::mises ETO::mises epcum
  ***material 
   **elset wall  
    *file contact5.inp 1
   **elset ball
    *file contact5.inp 2 
****return