Finite element modelling of thin sheet steel screw connections

Abstract

This study focused on the non-linear finite element modelling procedure, utilising the explicit dynamic analysis technique, and how the various modelling parameters affect the accuracy. The computer modelling of screwed connections is a complex task, and the objective was to investigate the different modalities of finite element modelling to effectively analyse thin sheet steel screwed connections, through calibration against test data found within existing literature. Several aspects of the modelling procedure were examined, including contact definitions, the effective control of the applied load and how it affects the energy output of the finite element model. The final calibrated model was utilised in subsequent parametric studies, which investigated the effect of the steel sheet thickness, as well as the number of the screws used. Results concluded that the finite element model could effectively simulate the expected experimental behaviour of these connections.