Oasys LS-DYNA Environment 8.1 VOLUME 3 ... - Oasys Software

Oasys LS-DYNA Environment: User Guide (Version 8.1)
LS-DYNA Manual Section: *CONTACT_ENTITY
Example of: Rigid Sphere impacts Plate
Example Filename: sphere_geometric.key
Description:
A rigid sphere drops onto an elastic plate. The sphere contains shell elements automatically
generated with a Geometric Contact Entity spherical surface.
Model:
The plate of elastic material measures 40 × 40 × 2 mm 3 and contains 64 Belytschko-Tsay shell
elements. The sphere has a radius of 6.0 mm and the distance from the center of the cube to the
plate is 8.5 mm. The inertia properties of the sphere are defined by the properties of the rigid brick
element. A geometric contact entity defines the spherical contact surface.
The sphere moves toward the plate with a uniform motion. The termination time is 0.0005 seconds.
Input:
The Geometric Contact Entity defines the outer master surface on the rigid sphere
(*CONTACT_ENTITY). The nodes on the plate are slave nodes (*SET_NODE_LIST) , and are
in the Geometric Entity.
A load curve definition defines the movement of the sphere (*PRESCRIBED_MOTION_RIGID,
*DEFINE_CURVE). The displacement condition for rigid bodies is input by material numbers, not
by listing the nodes included in the definition.
Reference:
Schweizerhof, K. and Weimer, K.
Page A.43