ZeroLengthImpact3D: Difference between revisions
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# This element has been developed on top of the “zeroLengthContact3D”. All the notes available in [[ ZeroLengthContact_Element | “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 [[ ZeroLengthContact_Element | “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 [[ Impact_Material | “ImpactMaterial” ]] to “zeroLengthContact3D”, without the need for extra nodes and elements in the modeling process | # This element adds the capabilities of [[ Impact_Material | “ImpactMaterial” ]] to “zeroLengthContact3D”, without the need for extra nodes and elements in the modeling process. | ||
# For simulating a surface-to-surface contact, this element can be defined for connecting the nodes on master surface to the nodes on slave surface. | # For simulating a surface-to-surface contact, this element can be defined for connecting the nodes on master surface to the nodes on slave surface. | ||
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APPLICATION: | APPLICATION: | ||
# This element has been employed to simulate the ''' bridge hinge movements''' like superstructure-abutment interaction in bridges at University of Connecticut (UConn) and University of Nevada, Reno (UNR). This element was found to be fast-converging and eliminating the need for extra elements and nodes in the modeling process. | # This element has been employed to simulate the ''' bridge hinge movements''' like superstructure-abutment interaction in bridges at University of Connecticut (UConn) and University of Nevada, Reno (UNR). This element was found to be fast-converging and eliminating the need for extra elements and nodes in the modeling process. | ||
# The capability of having an initial gap in the normal direction and also the capability of considering energy dissipation due to pounding/impact in the normal direction. | |||
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Revision as of 21:14, 29 May 2013
- Command_Manual
- Tcl Commands
- Modeling_Commands
- model
- uniaxialMaterial
- ndMaterial
- frictionModel
- section
- geometricTransf
- element
- node
- sp commands
- mp commands
- timeSeries
- pattern
- mass
- block commands
- region
- rayleigh
- Analysis Commands
- Output Commands
- Misc Commands
- DataBase Commands
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:
- 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.
- For simulating a surface-to-surface contact, this element can be defined for connecting the nodes on master surface to the nodes on slave surface.
REFERENCES: zeroLengthContact3D , ImpactMaterial
Code Developed by: Dr. A.E. Zaghi, M. Cashany @ University of Connecticut (UConn)
APPLICATION:
- This element has been employed to simulate the bridge hinge movements like superstructure-abutment interaction in bridges at University of Connecticut (UConn) and University of Nevada, Reno (UNR). This element was found to be fast-converging and eliminating the need for extra elements and nodes in the modeling process.
- The capability of having an initial gap in the normal direction and also the capability of considering energy dissipation due to pounding/impact in the normal direction.
EXAMPLE SCRIPT: The following zip file contains an example script and the corresponding input cyclic displacement: