Macroscopic Modelling of Flow-Drill Screw Connections

Abstract:

This study focuses on the modelling of Flow-Drill Screw (FDS) connections in large-scale shell analyses. Macroscopic connection models for large-scale crash simulations were assessed for modelling of FDS connections between two aluminium plates. Of the investigated models were two commercial element-based and three commercial constraint-based models, as well as two new user-defined element-based models. All models were calibrated using cross tests in tension, shear and a mixed shear/tension mode. In order to assess the flexibility of the models two sets of experimental data were used. In the first one, a small screw was used to join two sheets of the same rolled alloy while the second set used a longer screw with a larger head to join a rolled alloy to an extrusion. The calibrated models were validated using a two-step approach involving benchmark and component tests. Of the commercial models, the constraint-based performed better than the element-based. The new user-defined models gave similar results as the commercial constraint-based models. From the obtained results, recommendations for modelling of FDS connections for large-scale analyses were formulated.

• Periodical: Key Engineering Materials (Volume 710)
• Pages: 143-148
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.710.143
• Online since: September 2016
• Authors: Johan Kolstø Sønstabø*, David Morin, Magnus Langseth
• Keywords: Automotive, Connection, Finite Element, Flow-Drill Screw, Large-Scale, Macroscopic

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