ZeroLengthImpact3D: Difference between revisions

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# This element has been developed on top of the “zeroLengthContact3D”. All the notes available in “zeroLengthContact3D” wiki page would apply to this element as well. It includes the definition of master and slave nodes, the number of degrees of freedom in the domain, etc.
# This element has been developed on top of the “zeroLengthContact3D”. All the notes available in “zeroLengthContact3D” wiki page would apply to this element as well. It includes the definition of master and slave nodes, the number of degrees of freedom in the domain, etc.
# This element adds the capabilities of “ImpactMaterial” to “zeroLengthContact3D”, without the need for extra nodes and elements in the modeling process.  
# This element adds the capabilities of “ImpactMaterial” to “zeroLengthContact3D”, without the need for extra nodes and elements in the modeling process.  
#
# 1- The capability of having an "initial gap" in the normal direction.
2- The capability of considering energy dissipation due to impact in the normal direction.





Revision as of 18:40, 28 May 2013




This command constructs a node-to-node zero-length contact element in 3D space.

element zeroLengthImpact3D $tag $slaveNode $masterNode $direction $initGap $frictionRatio $Kt $Kn $Kn2 $Delta_y $cohesion




$tag unique element object tag
$slaveNode Slave node tag
$masterNode Master node tag
$direction

1 if normal vector of master plane points to +X direction

2 if normal vector of master plane points to +Y direction

3 if normal vector of master plane points to +Z direction

$initGap Initial gap between master plane and slave plane
$frictionRatio Friction ratio
$Kt Penalty in tangential directions (parallel to master and slave planes)
$Kn Penalty in normal direction (normal to master and slave planes)
$Kn2 Penalty in normal direction after yielding based on Hertz impact model
$Delta_y Yield deformation based on Hertz impact model
$cohesion Cohesion, if no cohesion, it is zero


NOTES:

  1. This element has been developed on top of the “zeroLengthContact3D”. All the notes available in “zeroLengthContact3D” wiki page would apply to this element as well. It includes the definition of master and slave nodes, the number of degrees of freedom in the domain, etc.
  2. This element adds the capabilities of “ImpactMaterial” to “zeroLengthContact3D”, without the need for extra nodes and elements in the modeling process.
  3. 1- The capability of having an "initial gap" in the normal direction.

2- The capability of considering energy dissipation due to impact in the normal direction.




EXAMPLES:

Gang Wang to provide a smart example!



REFERENCES:



Code Developed by: Arash E. Zaghi, Majid Cashany, University of Connecticut (UConn)