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Analysis of the Influence of Fibers on the Formability of Metal Blanks in Manufacturing Processes for Fiber Metal Laminates

1
Institute of Forming Technology and Lightweight Components, TU Dortmund University, 44227 Dortmund, Germany
2
Institute of Product and Process Innovation, Leuphana University Lueneburg, 21339 Lüneburg, Germany
3
Institute of Materials Research, Magnesium Innovation Centre, Helmholtz Zentrum Geesthacht, 21502 Geesthacht, Germany
*
Author to whom correspondence should be addressed.
J. Manuf. Mater. Process. 2019, 3(1), 2; https://doi.org/10.3390/jmmp3010002
Received: 24 November 2018 / Revised: 28 December 2018 / Accepted: 29 December 2018 / Published: 5 January 2019
(This article belongs to the Special Issue Analysis and Modeling of Sheet Metal Forming Processes)
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Abstract

In the one-step manufacturing process for fiber metal laminate parts, the so-called in situ hybridization process, the fabrics are interacting with metal blanks. During deep drawing, the liquid matrix is injected between the metal sheets through the woven fiber layers. The metal blanks can be in contact with dry or with infiltrated fibers. The formability of the blanks is influenced by the variation of the starting time of injection. The reason for that is that, due to high contact forces, the fibers are able to deform the metal surface locally, so that movement and the strain of the blanks is inhibited. To investigate the influence of different fibers on the formability of metals, Nakazima tests are performed. In these tests, two metal blanks are formed with an interlayer of fibers. The results are compared with the formability of two blanks without any interlayer. It is shown that in with fibers between sheets, the formability decreases compared to the formability of two metal blanks without interlayers. Based on a simplified numerical model for different types of fibers, the interactions of the fibers with the metal blank are analyzed. It could be shown that the friction due to contact has more influence than the friction due to the form fit caused by the imprints. View Full-Text
Keywords: fiber metal laminates; deep drawing; formability fiber metal laminates; deep drawing; formability
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Mennecart, T.; Gies, S.; Ben Khalifa, N.; Tekkaya, A.E. Analysis of the Influence of Fibers on the Formability of Metal Blanks in Manufacturing Processes for Fiber Metal Laminates. J. Manuf. Mater. Process. 2019, 3, 2.

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