Numerical Investigation of the Variability of Bolt Forces in a Preloaded Asymmetric Multi-Bolted Connection under Cyclical Loading

Abstract

A numerical study of a seven-bolt connection with an asymmetric contact surface between the components to be joined is reported. The investigations were organised into two steps. Firstly, the connection was preloaded in a three-pass cycle. Then, the connection was subjected to the cyclically varying force imposed at an angle of 30 degrees to the joined components' contact surfaces to produce both compressive and shear loads in the connection. The connection modelling was performed in the finite element method convention. The joined components were discretized using three-dimensional finite elements and the fasteners were modelled as special elements consisting of flexible beams, stiff heads, and stiff nuts. The article is concluded by analysing selected computational outcomes.