Contact Check

Purpose:

This interface is used for contact checking which fall under two main categories: initial penetration and tied contact. Initial penetration checking allows the user to check the defined contacts for initial penetrations and crossed edge. A group of parts can also be checked for initial penetrations using the ByParts option. Upon identifying initial penetration, they can be fixed using the fix button. Tied contact checking helps to determine if tied contacts will be successfully tied or not. Often tied surfaces are too far from each other, and do not get tied by LS-DYNA.

Function:

Sample:

no sample.

Penetration Check

  • Parts : Select parts to check.

  • Contact : Select *CONTACT to check.

  • Crossed edges : Check for crossed edges.

  • Penetrations : Check for penetrations.

  • Thickness : When not toggled, thickness from model data is used.

  • Interior edge : Check for interior edge-edge penetrations.

  • CE : Display crossed edges.

  • Penet : Display penetrating nodes.

  • SF : Scale factor for penetration vectors.

  • Ignore < : Ignore penetrations less than specified value.

  • Lock Nodes : Lock nodes that are not allowed to move while fixing.

  • Flip Node : Flip a node to the opposite side of the closest visible element.

  • Undo : Undo last Flip operation.

  • Check : Perform initial penetration check.

  • Fix : Perform fixing of node to surface penetrations.

  • Undo : Undo the last Fix.

Tied Check

  • Tied : Display tied nodes.

  • Not Tied : Display nodes that fail being tied.

  • Label : Display label for tied nodes.

  • CFNS : Create a node set for nodes that fail to tie.