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Physical property data defined using the command 'PROPERTY PHYSICAL ...', and applied to parts or sets using the command 'PROPERTY ATTACH ...'. For the simple beam elements (e.g. EP4) the cross-sectional area is the only physical property needed. It may be defined using the command 'PROPERTY PHYSICAL THICKNESS thk', and is transferred to the last field of type 31 cards. Brick and axisymmetric elements do not require physical properties.
For the more sophisticated 3D beam elements (eg. CSB12) it will be necessary to define additional properties using the command 'PROPERTY PHYSICAL ...' such as a beam orientation, beam offset, and beam sectional properties. Where beam orientation vectors are defined in FEMGEN, the interface will produce pseudo nodes. These are placed on type 25 cards. The THK field is used as a reference (eg 1. 2. 3. etc.) to a following type 32 card on which this reference is repeated together with the beam section data, and for GBE12 elements with non-zero beam offsets a type 33 card will also be output. Solid circular and U-section beams are not supported by BERSAFE and are trapped out by the interface. Timoshenko theory is requested.
The beam section must be circular or square ie. 'PIPE' or 'BOX' in FEMGEN. Beam orientation information is not needed and is discarded in the interface if present.
The beam section must be circular ie. 'PIPE' in FEMGEN. The beam orientation is used to define the plane of curvature, and the radius of curvature is given a an additional third parameter in the 'PROPERTY PHYSICAL SECTION PIPE' command.
All BERSAFE section types are supported. Solid circular and U-section properties are not supported by BERSAFE and will be disgarded in the interface.
Only the no-pseudo node version is supported. All beam sectional data be it a PIPE, BOX etc is interpreted in the same way: the first three section values are interpreted as AC, AW, and AA respectively. Beam offsets and beam orientations are not supported and will be disgarded if specified.
Femsys Limited