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Fiber breakage modeling based on hydrodynamic forces in macroscopic process simulations

Wittemann, Florian ORCID iD icon 1; Maertens, Robert ORCID iD icon; Henning, Frank 1; Kärger, Luise 1
1 Institut für Fahrzeugsystemtechnik (FAST), Karlsruher Institut für Technologie (KIT)


Injection molding is one of the most important processes for manufacturing parts from discontinuous fiber reinforced polymers. Fiber length and orientation do not only influence the final structural behavior in an anisotropic way, but also the flow field and hence the mold filling process. Therefore, fiber length distribution and fiber breakage modeling are important aspects of an adequate process simulation. For fiber breakage modeling, hydrodynamic forces from matrix on fibers are considered within this work. Knowing the flow field and fiber orientation distributions of the homogenized material, flow-induced hydrodynamic forces on the fibers can be calculated. The fiber orientation tensor is used to determine reference fibers in every element. Based on this information an advanced approach for fiber breakage modelling is proposed. The fiber length distribution in the final part is compared to experimental data of a reactive injection molding process, showing good agreement.

Postprint §
DOI: 10.5445/IR/1000157079
Veröffentlicht am 20.03.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Fahrzeugsystemtechnik (FAST)
Institut für Angewandte Materialien – Werkstoffkunde (IAM-WK)
Publikationstyp Proceedingsbeitrag
Publikationsdatum 22.12.2022
Sprache Englisch
Identifikator ISBN: 978-2-9701614-0-0
KITopen-ID: 1000157079
Erschienen in Composites Meet Sustainability - Proceedings of the 20th European Conference on Composite Materials. Ed.: A. Vassilopoulos
Veranstaltung 20th European Conference on Composite Materials (ECCM 2022), Lausanne, Schweiz, 26.06.2022 – 30.06.2022
Verlag École Polytechnique Fédérale de Lausanne (EPFL)
Serie 629-636
Schlagwörter Discontinuous fiber reinforced polymers; injection molding simulation; hydrodynamic forces; fiber breakage
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