2.2.5 Choose an Algorithm

Fig. 2.2.5.1: Deflection and stress-strength ratio of a cantilever beam with a point-load at its tip

Karamba3D provides various options for analyzing a structural model. The “Analyze” component (see Fig. 2.2.5.1) calculates the deformation and stresses of a model under external loads. The “Deformation” slider in the “Display Scales” submenu of the “ModelView” component allows scaling the graphical output of the displacements. The default magnification factor is 50, but this can be adjusted if the numeric range of the “Deformation” slider does not fit.

Double-clicking the knob of the slider opens a window for adjusting the slider settings.

To obtain the numerical values corresponding to the colors of the utilization output, use the “Legend” component as shown in Fig. 2.2.5.1. The stress-wise utilization output of the “BeamView” component is calculated by dividing the normal stress at a point of the cantilever by the strength of its material. Negative values indicate compression, while positive values indicate tension.

However, stress-wise utilization can be misleading. Slender beams under axial compression may buckle and collapse before the compressive stresses reach the material strength. In such cases, use the “Utilization” component, which includes stability considerations.