SimpleContact2D

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This command is used to construct a SimpleContact2D element object.

element SimpleContact2D $eleTag $iNode $jNode $sNode $lNode $matTag $gTol $fTol

$eleTag	unique integer tag identifying element object
$iNode $jNode	master nodes
$sNode	slave node
$lNode	Lagrange multiplier node
$matTag	unique integer tag associated with previously-defined nDMaterial object
$gTol	gap tolerance
$fTol	force tolerance

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The SimpleContact2D element is a two-dimensional node-to-segment contact element which defines a frictional contact interface between two separate bodies. The master nodes are the nodes which define the endpoints of a line segment on the first body, and the slave node is a node from the second body. The Lagrange multiplier node is required to enforce the contact condition. This node should not be shared with any other element in the domain. Information on the theory behind this element can be found in, e.g. Wriggers (2002).

NOTE:

1. The SimpleContact2D element has been written to work exclusively with the ContactMaterial2D nDMaterial object.
2. The valid recorder queries for this element are:
   1. force - returns the contact force acting on the slave node in vector form.
   2. frictionforce - returns the frictional force acting on the slave node in vector form.
   3. forcescalar - returns the scalar magnitudes of the normal and tangential contact forces.
3. The SimpleContact2D element works well in static analysis situations. Extension to transient analysis is underway.

EXAMPLE: SimpleContact2D element with tag 1, connectivity with nodes 1, 2, 3, and 4, and material with tag 1

element SimpleContact2D 1  1 2 3 4  1  1.0e-10 1.0e-10

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Code Developed by: Kathryn Petek, Pedro Arduino, & Peter Mackenzie-Helnwein, at the University of Washington

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References:

1. Wriggers, P. (2002). Computational Contact Mechanics. John Wilely & Sons, Ltd, West Sussex, England.