Flattened Tube

@SHAPE_BUILDER_ANALYSIS {
@SHAPE_BUILDER_NAME {FlubName} {
@SHAPE_GROUP {WALLED_CLOSED}
@SHAPE_TYPE {FLATTENED_TUBE}
@DIMENSIONS {
@DIMENSION_01 {h}
@DIMENSION_02 {wT}
@DIMENSION_03 {t}
@DIMENSION_04 {αT}
@DIMENSION_05 {wB}
@DIMENSION_06 {αB}
@DIMENSION_07 {α}
@DIMENSION_08 {β}
}
@MATERIALS {
@MATERIAL_01 {Mat1}
}
@IS_DEFINED_IN_FRAME {FrameName}
@MESH_DENSITY {md}
@COMMENTS {CommentText}
}
}

Notes

  • ShapeBuilder can generate beam cross-sections in the shape of a flattened tube. To define a flattened tube, use the following parameters.
    1. @SHAPE_GROUP: WALLED_CLOSED, and
    2. @SHAPE_TYPE: FLATTENED_TUBE.
  • The flattened tube consists of a single zone. No options can be defined for this sectional shape.
  • Optional dimensions @DIMENSION_07 and @DIMENSION_08 define two shaping parameters, denoted α and β, respectively, which are used to round the corners of the section. (Default value: α = β = 0.5).
  • Sectional shapes are defined in their own local coordinate system, which is assumed to coincide with the global coordinate system. If a fixed frame, FrameName, is specified, the local coordinate system coincides with this fixed frame.
  • The mesh density parameter, md, determines the level of mesh refinement. (Default: md = 4)
  • It is possible to attach comments to the definition of the object; these comments have no effect on its definition.

The flattened tube: base configuration

Component Dimension Symbol Default Nb.
flattened tube height h required 01
Top flange width wT required 02
Top flange thickness t required 03
Top flange angle αT 04
Bot flange width wB wT 05
Bot flange angle αB 06
Table 1. Dimensions defining the geometry of the flattened tube.
  • The base configuration of the flattened tube is shown in fig. 1. No options are available for this shape.
  • The geometric configuration of the flattened tube if defined by the dimensions listed in table 1, which are also indicated in fig. 1. Dimensions labeled in red are required. Dimensions labeled in blue are optional and are assigned the default value indicated in table 1.
  • The flattened tube features a single zone.
    1. Zone 1.
      • Comprises the following faces: FlangeTop, SideRightTop, SideRightBot, FlangeBot, SideLeftBot, and SideLeftTop.
      • Is associated with homogeneous material properties, Mat.
  • Figure 1. Configuration of the flattened tube