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

*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.

*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