Karamba3D offers five basic types of beam cross section:
circular tube β the default
hollow box section
filled trapezoid section
I-profile
Fig. 3.3.1: Cantilever with four different kinds of cross section
Fig. 3.3.1 shows a cantilever with cross section properties defined directly at the βLineToBeamβ-component. Without eccentricities defined, the beam axis always coincides with the centroid of a cross section. Changing e.g the upper flange width of an I-section therefore results in a slight movement of the whole section in the local Z-direction. In case the position of e.g. the upper side of a cross section needs to be fixed, specify an eccentricity. This can be done either via a specific component (see section 3.3.7) or through the input-plug βEcce-locβ. Provide a vector there in order to move the cross sections relative to the beam axis. The given eccentricity is relative to the local coordinate system of the beam. The resulting position of the centroid can be retrieved from the βDisassemble Cross Sectionβ-component (see section 3.3.4).
Apart from the input-plugs that define the cross section geometry, the βElem|Idβ- and the βEcce-locβ-input there are:
β
β
βFamilyβ
Each cross section belongs to a family. When doing cross section optimization (see section 3.5.8), Karamba3D selects only profiles that belong to the same family as the original section. Families can be composed of arbitrary section types
βName"
The identifier of a cross section β need not be unique. Enable βCroSec namesβ in "ModelView"s βRenderSettingsβ-submenu in order to view them.
βColorβ
Lets one define a color for a cross section. In order to see it enable βCross sectionsβ in submenu βColorsβ of the βModelViewβ-component and activate βCroSec sectionβ in submenu βRender Settingsβ of the βBeamViewβ-component.
βMaterialβ
Sets the material of the cross section. Indirect material assignments via the βAssembleβ-component override direct definition of the cross section material.