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Functions
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9. Element reference
Element functions supported by OpenFEM are listed below. The rule is to have element families (2D and 3D) with families of formulations selected through element properties and implemented for all standard shapes
| 3-D volume element shapes | |
| hexa8 | 8-node 24-DOF brick |
| hexa20 | 20-node 60-DOF brick |
| hexa27 | 27-node 81-DOF brick |
| penta6 | 6-node 18-DOF pentahedron |
| penta15 | 15-node 45-DOF pentahedron |
| tetra4 | 4-node 12-DOF tetrahedron |
| tetra10 | 10-node 30-DOF tetrahedron |
| 2-D volume element shapes | |
| q4p | 4-node quadrangle |
| q5p | 5-node quadrangle |
| q8p | 8-node quadrangle |
| q9a | 9-node quadrangle |
| t3p | 3-node 6-DOF triangle |
| t6p | 6-node 12-DOF triangle |
Supported problem formulations are listed in section 6.1, in particular one considers 2D and 3D elasticity, acoustics, hyperelasticity, fluid/structure coupling, piezo-electric volumes, ...
Other elements, non generic elements, are listed below
| 3-D plate/shell Elements | |
| dktp | 3-node 9-DOF discrete Kirchoff plate |
| mitc4 | 4-node 20-DOF shell |
| quadb | quadrilateral 4-node 20/24-DOF plate/shell |
| quad9 | (display only) |
| quadb | quadrilateral 8-node 40/48-DOF plate/shell |
| tria3 | 3-node 15/18-DOF thin plate/shell element |
| tria6 | 6-node 36DOF thin plate/shell element |
| Other elements | |
| bar1 | standard 2-node 6-DOF bar |
| beam1 | standard 2-node 12-DOF Bernoulli-Euler beam |
| beam1t | pretensionned 2-node 12-DOF Bernoulli-Euler beam |
| beam3 | (display only) |
| celas | scalar springs and penalized rigid links |
| mass1 | concentrated mass/inertia element |
| mass2 | concentrated mass/inertia element with offset |
| rigid | handling of linearized rigid links |
| Utility elements | |
| fe_super | element function for general superelement support |
| integrules | FEM integration rule support |
| fsc | fluid/structure coupling capabilities |
