Tri31 Element: Difference between revisions
Jump to navigation
Jump to search
(Created page with '{{CommandManualMenu}} This command is used to construct a constant strain triangular element (Tri31) which uses three nodes and one integration points. {| | style="background:...') |
m (Note on material mass density) |
||
| (3 intermediate revisions by one other user not shown) | |||
| Line 4: | Line 4: | ||
{| | {| | ||
| style="background:yellow; color:black; width:800px" | '''element | | style="background:yellow; color:black; width:800px" | '''element tri31 $eleTag $iNode $jNode $kNode $thick $type $matTag <$pressure $rho $b1 $b2>''' | ||
|} | |} | ||
| Line 23: | Line 23: | ||
| '''$pressure''' || surface pressure (optional, default = 0.0) | | '''$pressure''' || surface pressure (optional, default = 0.0) | ||
|- | |- | ||
| '''$rho''' || element mass density (per unit volume) from which a lumped element mass matrix is computed (optional, default=0.0) | | '''$rho''' || element mass density (per unit volume) from which a lumped element mass matrix is computed (optional, default=0.0; if rho=0.0, then materials are queried for mass density) | ||
|- | |- | ||
| '''$b1 | | '''$b1 $b2''' || constant body forces defined in the domain (optional, default=0.0) | ||
|} | |} | ||
| Line 32: | Line 32: | ||
# Consistent nodal loads are computed from the pressure and body forces. | # Consistent nodal loads are computed from the pressure and body forces. | ||
#The valid queries to a Tri31 element when creating an ElementRecorder object are 'forces', 'stresses,' and 'material $matNum matArg1 matArg2 ...' Where $matNum refers to the material object at the integration point corresponding to the node numbers in the domain. | #The valid queries to a Tri31 element when creating an ElementRecorder object are 'forces', 'stresses,' and 'material $matNum matArg1 matArg2 ...' Where $matNum refers to the material object at the integration point corresponding to the node numbers in the domain. | ||
---- | |||
Code Developed by: <span style="color:blue"> [http://www.roozbehgm.com/ Roozbeh G. Mikola], UC Berkeley</span> and <span style="color:blue"> [http://www.ce.berkeley.edu/~sitar/ N. Sitar], UC Berkeley</span> | |||
Latest revision as of 21:49, 17 June 2020
- 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 is used to construct a constant strain triangular element (Tri31) which uses three nodes and one integration points.
| element tri31 $eleTag $iNode $jNode $kNode $thick $type $matTag <$pressure $rho $b1 $b2> |
| $eleTag | unique element object tag |
| $iNode $jNode $kNode | three nodes defining element boundaries, input in counter-clockwise order around the element. |
| $thick | element thickness |
| $type | string representing material behavior. The type parameter can be either "PlaneStrain" or "PlaneStress." |
| $matTag | tag of nDMaterial |
| $pressure | surface pressure (optional, default = 0.0) |
| $rho | element mass density (per unit volume) from which a lumped element mass matrix is computed (optional, default=0.0; if rho=0.0, then materials are queried for mass density) |
| $b1 $b2 | constant body forces defined in the domain (optional, default=0.0) |
NOTE:
- Consistent nodal loads are computed from the pressure and body forces.
- The valid queries to a Tri31 element when creating an ElementRecorder object are 'forces', 'stresses,' and 'material $matNum matArg1 matArg2 ...' Where $matNum refers to the material object at the integration point corresponding to the node numbers in the domain.
Code Developed by: Roozbeh G. Mikola, UC Berkeley and N. Sitar, UC Berkeley