FEMGEN will generate a finite element mesh of nodes and geometric element types. These geometric element types are related to the FINEL element names via an element variant number. The element variant mappings for FINEL may be displayed by using the FEMGEN command 'UTILITY TABULATE FE FINEL', and these mappings are shown in table 2.1. In addition, the user can now set their own default FINEL element variants by defining them in a FEMGV resource file (see the FEMGV Users Manual for more details).
Element variants are assigned using the command 'MESHING TYPES part ELTYPE variantno'. The variant number is optional and the default is 1. It is also possible to specify an element variant by using its name directly, i.e. 'MESHING TYPES part QS08 3'.
Nodal coordinates are output in the global cartesian system, regardless of the system in which the model was defined in FEMGEN.
All elements with the same element type, the same material and the same physical property are output together. The FEMGEN geometric part the elements belong to is also specified in the input file.
The jacobian (or sense) of all elements is checked by the interface and corrected where necessary. The interface also re-numbers the elements according to the FINEL conventions. For models where one or more nodes lie outside the X-Y plane, the interface will not perform a jacobian check on TR3, TR6, QU4 and QU8 elements.
Femgen
Eltype FINEL Element Variants BE2 1 = KM02 2 2 = LM02 3 3 = MM02 2 4 = KX02 X 5 = MR02 2 6 = MXR2 X 7 = KB02 2 BE3 1 = KM03 2 2 = LM03 3 3 = MM03 2 4 = KX03 X 5 = MR03 2 6 = MXR3 X TR3 1 = SM03 E 2 = SM03 A 3 = SX03 X QU4 1 = PM04 E 2 = PM04 A 3 = PX04 X 4 = QM04 3 5 = QS04 3 6 = QX04 X 7 = NM04 3 8 = NR04 3 TR6 1 = SM06 E 2 = SM06 A 3 = SX06 X 4 = TX06 X QU8 1 = PM08 E 2 = PM08 A 3 = PX08 X 4 = QM08 3 5 = QS08 3 6 = QX08 X 7 = NM08 3 8 = NR08 3 HE8 1 = HX08 3 PE15 1 = HX20 3 HE20 1 = HX20 3
In table 2.1, the FINEL elements are given with a key which meaning is given below:
2=2D 3=3D E=Plane-stress A=Plane-strain X=Axisymmetric