Abstract
Modelling and calculations of asymmetrical nonlinear multi-bolted connections treated as a system composed of four subsystems are presented. These subsystems are: a couple of joined elements (a flange and a support), a contact layer between the elements, and a set of bolts. The physical model of the system on the assembly state is described taking into account the bolt preloading conducted according to a specific sequence. For the modelling the finite element method is used. The flange and the support are built with spatial finite elements. The contact layer is formed as a nonlinear Winkler model, and the set of bolts are modelled using simplified beam models (named as rigid body bolt models). The calculation model is presented, by means of which changing force values in the bolts during the preloading of the system and at its end can be determined. Results of calculations for the exemplary multi-bolted system are presented.
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