Difference between revisions of "Tri31 Element"
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| − | | 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 $b2>''' |
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| '''$pressure''' || surface pressure (optional, default = 0.0) | | '''$pressure''' || surface pressure (optional, default = 0.0) | ||
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| − | | '''$rho''' || element mass density (per unit volume) from which a lumped element mass matrix is computed (optional, default=0.0) | + | | '''$rho''' || element mass density (per unit volume) from which a lumped element mass matrix is computed (optional, default=0.0; if rho=0.0, then materials are queried for mass density) |
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| − | | '''$b1 | + | | '''$b1 $b2''' || constant body forces defined in the domain (optional, default=0.0) |
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# 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. | ||
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| + | ---- | ||
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| + | 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
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
