Sphere

A " Stonewall" - sphere impacts an elastic plate. (The sphere will not be shown in LSTAURUS.)

*RIGIDWALL_GEOMETRIC_SPHERE_MOTION
Rigid Wall Sphere Impacts a Plate
LS-DYNA Manual Section: *RIGIDWALL_GEOMETRIC_SPHERE_MOTION

Example: Rigid Wall Sphere Impacts a Plate

Filename: rigidwall_geometric_sphere.plate.k

Description:
A " Stonewall" - sphere impacts an elastic plate. (The sphere will not be shown
in LSTAURUS.)

Model:
The plate has an elastic material model with Belytschko-Tsay shell formulation.
The plate is 40 * 40 * 2 mm3. The sphere has a radius of 8 mm and its center is
9 mm above the plate. The sphere moves towards the plate with a prescribed
displacement resulting in a velocity of velocity of 3 mm/second.

Input:
A spherical stonewall surface represents the true geometry of the ball.
(*RIGIDWALL_GEOMETRIC_SPHERE_MOTION). The stone wall cards contain direction
and load curve number defining the motion. All nodes of the plate are prevented
from penetrating the sphere.

Reference:
Schweizerhof, K. and Weimar, K.

*CONTROL_HOURGLASS
*CONTROL_TERMINATION
*DATABASE_BINARY_D3PLOT
*DATABASE_EXTENT_BINARY
*DATABASE_RWFORC
*DEFINE_CURVE
*ELEMENT_SHELL
*END
*KEYWORD
*MAT_ELASTIC
*NODE
*PART
*RIGIDWALL_GEOMETRIC_SPHERE_MOTION
*SECTION_SHELL
*TITLE

  *KEYWORD
  *TITLE
  Geometric Sphere Impacting a Plate
  $
  $  LSTC Example
  $
  $  Last Modified: September 19, 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
    .5000E-3
  $
  *CONTROL_HOURGLASS
  $      ihq        qh
           4
  $
  $
  *DATABASE_BINARY_D3PLOT
  $       dt      lcdt
   0.0200E-3
  $
  *DATABASE_EXTENT_BINARY
  $    neiph     neips    maxint    strflg    sigflg    epsflg    rltflg    engflg
                                         1
  $   cmpflg    ieverp    beamip
  
  $
  *DATABASE_RWFORC
  $       dt
    0.005e-4
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Rigidwalls
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  *RIGIDWALL_GEOMETRIC_SPHERE_MOTION
  $     nsid    nsidex     boxid
           0
  $
  $       xt        yt        zt        xh        yh        zh      fric
        20.0      20.0       9.0      20.0      20.0       0.0
  $
  $   radsph
         8.0
  $
  $     lcid       opt        vx        vy        vz
           1         1       0.0       0.0      -1.0
  $
  $
  *DEFINE_CURVE
  $     lcid      sidr      scla      sclo      offa      offo
           1
  $           abscissa            ordinate
                   0.0                 0.0
                0.0005                15.0
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Define Parts and Materials
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $...>....1....>....2....>....3....>....4....>....5....>....6....>....7....>....8
  $
  *PART
  $      pid       sid       mid     eosid      hgid    adpopt
  plate
           1         1         1
  $
  $
  *MAT_ELASTIC
  $      mid        ro         e        pr        da        db         k
           1  2.00e-08   100000.     0.300
  $
  $
  *SECTION_SHELL
  $      sid    elform      shrf       nip     propt   qr/irid     icomp
           1             0.83333       2.0       3.0
  $       t1        t2        t3        t4      nloc
         2.0       2.0       2.0       2.0
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Define Nodes and Elements
  $
  $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
  $
  $$$$  Nodes on the outside edges of the plate are constrained in z-translation.
  $
  $
  *END