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Fiber-level bi-axial braid simulation for braid-trusion

Mohammad Ghaedsharaf, Jean-Evrard Brunel and Louis Laberge Lebel

Conference or Workshop Item - Paper (2017)

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Cite this document: Ghaedsharaf, M., Brunel, J.-E. & Laberge Lebel, L. (2017, July). Fiber-level bi-axial braid simulation for braid-trusion. Paper presented at 10th Canadian International Conference on Composites (CANCOM 2017), Ottawa, Ontario.
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Braid-trusion is a manufacturing process using a braided textile preform that is pulled into a pultrusion die. This process produces constant cross-section beams having reinforcement fibers oriented along the braid angle. The bi-axial braids are made from commingled yarns mixing carbon fibers and thermoplastic filaments. The bi-axial braid architecture is locked by the contacts between the bulky carbon/thermoplastic yarns. During pultrusion, the thermoplastic filaments melt. At this moment, the processing tensile loads adjust the braid architecture. The braid angle and the braid diameter reduces by reaching another locked state. This second locked state is driven by contacts between carbon yarns. The aim of this research is to model the braid deformation at the fiber scale using a non-linear finite element method. The model geometry is set up by the helix sinusoidal relations of the yarns path along a braid pitch. The braid large deformation is precisely modeled via a bundle of three-dimensional beam elements. The intertwined fibers contacts are modeled within a dynamic explicit solution. The model is validated with CT Scans of carbon fiber braids. This work will help the design of braid architecture for braid-trusion manufacturing.

Uncontrolled Keywords

Non-linear finite element; Braid-trusion; Micro scale model

Open Access document in PolyPublie
Subjects: 2100 Génie mécanique > 2100 Génie mécanique
Department: Département de génie mécanique
Research Center: CREPEC - Centre de recherche sur les systèmes polymères et composites à haute performance
Funders: Bombardier Aerospace, Pultrusion Technique, CRSNG/NSERC, Prima Québec
Grant number: CRDPJ488387-15
Date Deposited: 28 May 2020 16:00
Last Modified: 12 Aug 2021 14:37
PolyPublie URL: https://publications.polymtl.ca/5279/
Document issued by the official publisher
Conference Title: 10th Canadian International Conference on Composites (CANCOM 2017)
Conference Location: Ottawa, Ontario
Conference Date(s): 2017-07-17 - 2017-07-20


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