# Sphere — Welcome to LS-DYNA Examples

A ” Stonewall” – sphere impacts an elastic plate. (The sphere will not be shown in LS-PrePost.)

## Introduction

```*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 LS-PrePost.)

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.```

## Keywords

```*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```

## Reduced Input

```  *KEYWORD
*TITLE
Geometric Sphere Impacting a Plate
\$
\$  LSTC Example
\$
\$
\$  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
\$
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```