**2.3 The load inputs**

The loading conditions were obtained using a multi-body dynamic model (**Figure 4**) of the vehicle. This multi-body vehicle runs a rough road track made of Belgian blocks as the same way of a physical vehicle [2].

**Figure 4.** *Multi-body vehicle model used for loads acquisition.*

The reason for using rough road Belgian blocks track is to submit both structures to a high-cycle fatigue, instead of a high-load low cycle. Also, this kind of track can produce dynamic loads as we already defined previously.
