Forces

A cube impacts and rebounds from a rigid plate ( "Stonewall"). The plate is modeled with shell elements for viewing in LS-TAURUS.

*RIGIDWALL_PLANAR_FORCES
Cube Rebounding
LS-DYNA Manual Section: *RIGIDWALL_PLANAR_FORCES

Example: Cube Rebounding

Filename: rigidwall_planar.cube.k

Description:
A cube impacts and rebounds from a rigid plate ( "Stonewall"). The plate is
modeled with shell elements for viewing in LS-TAURUS.

Model:
The cube measures 10 * 10 * 10 mm3 and is 10 mm above the rigid plate.
It has 8 brick elements with elastic material properties. The initial velocity
of th e cube is 100,000 mm/second. The plate is an infinite "Stonewall"
- surface.

Input:
The box option defines the nodes with the initial velocity (*DE FINE_BOX,
*INITIAL_VELOCITY). The location of the "Stonew all" is at z=0
(*RIGIDWALL_PLANAR_FORCES). The nine nodes on the lower side of the cube are
slave nodes to the "Stonewall" definition. The soft option of the rigidwall
is used, which means that the slave nodes will come to stop within 10 time
steps of initial contact with the rigidwall.

Reference:
Schweizerhof, K. and Weimar, K.

*CONTROL_ENERGY
*CONTROL_HOURGLASS
*CONTROL_TERMINATION
*DATABASE_BINARY_D3PLOT
*DATABASE_BINARY_D3THDT
*DATABASE_GLSTAT
*DATABASE_HISTORY_NODE
*DATABASE_NODOUT
*DATABASE_RWFORC
*DEFINE_BOX
*ELEMENT_SHELL
*ELEMENT_SOLID
*END
*INITIAL_VELOCITY
*KEYWORD
*MAT_ELASTIC
*NODE
*PART
*RIGIDWALL_PLANAR_FORCES
*SECTION_SHELL
*SECTION_SOLID
*SET_NODE_LIST
*TITLE

  *KEYWORD
  *TITLE
  STONEWALL SURFACE  
  $
  $  LSTC Example
  $
  $  Last Modified: September 22, 1997
  $
  $  Units: ton, mm, s, N, MPa, N-mm
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Control Ouput
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  *CONTROL_TERMINATION
  $   endtim    endcyc     dtmin    endneg    endmas
    .4001E-3
  $
  *CONTROL_ENERGY
  $     hgen      rwen    slnten     rylen
           2         2
  $
  *CONTROL_HOURGLASS
  $      ihq        qh
           4
  $
  $
  *DATABASE_BINARY_D3PLOT
  $       dt      lcdt
   0.0200E-3
  $
  *DATABASE_BINARY_D3THDT
  $       dt      lcdt
    .0010E-3
  $
  *DATABASE_GLSTAT
  $       dt
     4.0e-06
  $
  *DATABASE_NODOUT
  $       dt
     4.0e-06
  $
  *DATABASE_HISTORY_NODE
  $      id1       id2       id3       id4       id5       id6       id7       id8
          13       201
  $
  *DATABASE_RWFORC
  $       dt
     4.0e-06
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Rigidwalls
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  *RIGIDWALL_PLANAR_FORCES
  $     nsid    nsidex     boxid
           1         0         0
  $
  $       xt        yt        zt        xh        yh        zh      fric
        20.0      20.0       0.0      20.0      20.0     100.0     0.000
  $
  $     soft      ssid      nid1      nid2      nid3      nid4
          10         0         1         4        13        16
  $
  $
  *SET_NODE_LIST
  $      sid
           1
  $     nid1      nid2      nid3      nid4      nid5      nid6      nid7      nid8
         201       202       203       204       205       206       207       208
         209
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Initial Conditions
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  $$$$  All nodes located within box 1 are given an initial velocity.
  $
  *INITIAL_VELOCITY
  $     nsid    nsidex     boxid
                               1
  $       vx        vy        vz       
         0.0       0.0 -100000.0
  $
  *DEFINE_BOX
  $    boxid       xmm       xmx       ymn       ymx       zmn       zmx
           1      14.9      25.1      14.9      25.1       9.0      21.0
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Define Parts and Materials
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  *PART
  $      pid       sid       mid     eosid      hgid    adpopt
  wall-display
           1         1         1
  cube
           2         2         2         0         0         0
  $
  $
  *MAT_ELASTIC
  $      mid        ro         e        pr        da        db
           1   2.00e-8  100000.0     0.300
  $
  *MAT_ELASTIC
  $      mid        ro         e        pr        da        db
           2   1.00e-8  100000.0     0.300
  $
  $
  *SECTION_SHELL
  $      sid    elform      shrf       nip     propt   qr/irid     icomp
           1             0.83333       2.0       3.0
  $       t1        t2        t3        t4      nloc
         2.0       2.0       2.0       2.0
  $
  *SECTION_SOLID
  $      sid    elform 
           2    
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Define Nodes and Elements
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  $
  *END