Crashbox

A symmetric short crush tube is impacted by a moving wall. Corner elements are removed on desired initial crush area. See file symtube.k for exploitation of symmetry.

*BOUNDARY_SPC_NODE
*CONTACT_AUTOMATIC_SINGLE_SURFACE
*CONTROL_ENERGY
*CONTROL_TERMINATION
*DATABASE_BINARY_D3PLOT
*DATABASE_BINARY_D3THDT
*DATABASE_EXTENT_BINARY
*DATABASE_GLSTAT
*DATABASE_HISTORY_NODE
*DATABASE_MATSUM
*DATABASE_NODOUT
*DATABASE_RWFORC
*DATABASE_SLEOUT
*ELEMENT_SHELL
*END
*KEYWORD
*MAT_PIECEWISE_LINEAR_PLASTICITY
*NODE
*PART
*RIGIDWALL_PLANAR_MOVING_FORCES
*SECTION_SHELL
*TITLE

  *KEYWORD
  *TITLE
  Short Crush Tube Impacted by a Moving Wall
  $
  $  J.D. Reid    2/14/95, 1/17/96, 2/15/00
  $
  $  Units: mm, kg, ms, kN, GPa, kN-mm
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Control Ouput
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  *CONTROL_TERMINATION 
  $   endtim    endcyc     dtmin    endeng    endmas
       20.00
  $
  *CONTROL_ENERGY
  $     hgen      rwen    slnten     rylen
           2         2
  $
  *DATABASE_BINARY_D3PLOT
  $       dt       lcdt
         1.0
  $
  *DATABASE_EXTENT_BINARY
  $    neiph     neips    maxint    strflg    sigflg    epsflg    rltflg    engflg
  
  $   cmpflg    ieverp    beamip
                     1
  $
  *DATABASE_BINARY_D3THDT
  $       dt       lcdt
      999999
  $
  $
  *DATABASE_GLSTAT
  $       dt
         0.1
  $
  *DATABASE_MATSUM
  $       dt
         0.1
  $      
  *DATABASE_NODOUT
  $       dt
         0.1
  $
  *DATABASE_HISTORY_NODE
  $      id1       id2       id3
       99999       259         7
  $
  *DATABASE_RWFORC
  $       dt
         0.1
  $
  *DATABASE_SLEOUT
  $       dt
         0.1
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Define Contacts - Sliding Interfaces
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  *CONTACT_AUTOMATIC_SINGLE_SURFACE
  $     ssid      msid     sstyp     mstyp    sboxid    mboxid       spr       mpr
           0
  $  Equating ssid to zero means that all segments are included in the contact
  $
  $       fs        fd        dc        vc       vdc    penchk        bt        dt
        0.08      0.08
  $
  $      sfs       sfm       sst       mst      sfst      sfmt       fsf       vsf
  
  $
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Define Stone Walls
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  *RIGIDWALL_PLANAR_MOVING_FORCES
  $     nsid    nsidex     boxid
           0         0         0
  $
  $       xt        yt        zt        xh        yh        zh      fric
         0.0       0.0     274.0       0.0       0.0       0.0       1.0
  $
  $  sw mass    sw vel
     800.000      8.94
  $
  $     soft      ssid     node1     node2     node3     node4
           0         0     99999
  $
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Define Materials and Parts
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $ 
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  *PART
  $      pid       sid       mid     eosid      hgid      grav    adpopt      tmid
  corner 1
           1         1         1
  corner 2
           2         1         1
  corner 3
           3         1         1
  corner 4
           4         1         1
  $
  $
  *MAT_PIECEWISE_LINEAR_PLASTICITY
  $      mid        ro         e        pr      sigy      etan      eppf      tdel
           1 7.830E-06     200.0       0.3     0.366               0.750
  $
  $        C         p      lcss      lcsr
          40         5
  $
  $ Values for plastic stress/strain curves
       0.000     0.025     0.049     0.072     0.095     0.118     0.140     0.182
       0.366     0.424     0.476     0.507     0.529     0.546     0.559     0.584
  $
  $
  *SECTION_SHELL
  $      sid    elform      shrf       nip     propt   qr/irid     icomp
           1         2              3.0000
  $       t1        t2        t3        t4      nloc
         2.0       2.0       2.0       2.0
  $ 
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Define Constraints, Boundary & Initial Conditions
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  $$$$   Nodal single point constraints
  $
  *BOUNDARY_SPC_NODE
  $      nid cid x y z rx ry rz
  $
  *END