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research-article

Prediction of process forces in fibre metal laminate stamping

[+] Author and Article Information
Marlon Hahn

Institute of Forming Technology and Lightweight Components, TU Dortmund University, Baroper Str. 303, 44227 Dortmund, Germany
marlon.hahn@iul-tu-dortmund.de

Nooman Ben Khalifa

Institute of Forming Technology and Lightweight Components, TU Dortmund University, Baroper Str. 303, 44227 Dortmund, Germany
nooman.ben_khalifa@iul.tu-dortmund.de

Arash Shabaninejad

Institute of Forming Technology and Lightweight Components, TU Dortmund University, Baroper Str. 303, 44227 Dortmund, Germany
arash.shabaninejad@tu-dortmund.de

1Corresponding author.

ASME doi:10.1115/1.4038369 History: Received January 23, 2017; Revised October 27, 2017

Abstract

The stamping of fibre metal laminates (FMLs) at thermoforming temperature of the thermoplastic matrix was investigated. The studied FML types consisted of a unidirectional carbon fibre reinforced core that was attached to metal cover layers either made of a steel or magnesium alloy. An analytical model was established in order to predict the process forces during forming, which are: the blankholder force required to make the metal covers yield plastically, the punch force, and the corresponding load distribution on the individual layers (outer layer, core layer, and inner layer). The global forces were primarily verified through experimental force measurements, while numerical simulations were mainly performed to assess the resulting load distribution by the help of strain distributions in the cover layers. The results showed that the introduced model can be applied successfully if the stamp-forming process is dominated by friction-induced tensional loading rather than by bending.

Copyright (c) 2017 by ASME
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