Introduction

*CONTACT
Shell Rebounds from Plate Using Five Contact Types
LS-DYNA Manual Section: *CONTACT

Additional Sections:
*INITIAL_VELOCITY

Example: Shell Rebounds from Plate Using Five Contact Types

Filename: contact.plates.k

Description:
A shell element drops and rebounds on an elastic plate.

Model:
The plate measures 40*40*1 mm3 and contains 16 shell elements. The dropped
shell element has a side length of 10 mm, a thickness of 2 mm and drop height
of 10 mm. All shell elements are elastic with Belytschko-Tsay formulation.
The dropped shell element has an initial velocity of 100,000 mm/second
vertically towards the plate. The calculations terminate at 0.0002 seconds.

Input:
All four nodes of the dropped shell element have an initial velocity specified
by *INITIAL_VELOCITY. Contact types 3, 5 and 10 use the dropped shell element
as slave side and the four shell elements in the center of the plate as
master side. The example file has type 3 contact activated, while the other
contact types are commented out. To change contact types, simply comment out
type 3 and un-comment the desired contact.

Type 3 contact is a two way surface to surface algorithm. The segments on the
slave side are checked for penetration of the master segment then the opposite
search takes place.

Type 4 is a single surface algorithm. The nodes of all segments are checked
for penetration of all segments.

Type 5 is a node to surface one way algorithm. The program checks that no slave
node penetrates any master segment.

Type 10 converts surface to surface definition into a node to surface
definition.
Type 13 is a more robust version of the single surface algorithm.

Reference:
Schweizerhof, K. and Weimar, K.