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Numerical Investigation of Carbon Braided Composites at the Mesoscale: using Computer Tomography as a Validation Tool

Vinot, Mathieu and Holzapfel, Martin and Jemmali, Raouf (2015) Numerical Investigation of Carbon Braided Composites at the Mesoscale: using Computer Tomography as a Validation Tool. In: 10th European LS-DYNA Conference, pp. 184-185. 10th European LS-DYNA Conference, 15.-17. Juni 2015, Würzburg, Deutschland. ISBN 978-3-9816215-2-5

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Abstract

So far analytical and, to a lesser extent, numerical approaches have been limited in their ability to predict the properties of braided composites because of the high complexity of the rovings’ interlacing. While many analytical theories have been developed to approach the stiffness of braided composites, only few models are able to reproduce their behaviour up to the global failure. As part of the research campus ARENA2036, which groups together partners from the industry and from research facilities, the DigitPro (Digital Prototype) project aims to develop a closed process chain for the manufacturing of braided composite parts, including, amongst others, braiding, draping and infiltration simulations as well as virtual material testings. The numerical material characterisation relies on the generation of an idealised geometrical model, using the open-source software TexGen, as a basis for finite-element simulations. The validation of the geometry and of its deformations under load is then performed with a CT investigation on a braided tensile test specimen. The numerical model of a 60°-biaxial braid appeared to be in good agreement with the rovings’ structure captured in the CT scans. It was proven that simulating the compaction of the dry rovings results in a more accurate representation of the rovings’ interlacing in the braided textile. Non-destructive technology, the CT scan furthermore allows for a detailed study of the failure modes within the braided structure. This presentation illustrates the modelling and validation process of a 60°-biaxial braided composite.

Item URL in elib:https://elib.dlr.de/101301/
Document Type:Conference or Workshop Item (Speech)
Title:Numerical Investigation of Carbon Braided Composites at the Mesoscale: using Computer Tomography as a Validation Tool
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Vinot, Mathieumathieu.vinot (at) dlr.deUNSPECIFIED
Holzapfel, Martinmartin.holzapfel (at) dlr.deUNSPECIFIED
Jemmali, Raoufraouf.jemmali (at) dlr.deUNSPECIFIED
Date:June 2015
Journal or Publication Title:10th European LS-DYNA Conference
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 184-185
ISBN:978-3-9816215-2-5
Status:Published
Keywords:ARENA2036, braided composites, mesoscale simulation, computer tomography
Event Title:10th European LS-DYNA Conference
Event Location:Würzburg, Deutschland
Event Type:international Conference
Event Dates:15.-17. Juni 2015
Organizer:LS-DYNA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Terrestrial Vehicles (old)
DLR - Research area:Transport
DLR - Program:V BF - Bodengebundene Fahrzeuge
DLR - Research theme (Project):V - NGC Fahrzeugstruktur (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Structural Integrity
Deposited By: Vinot, Mathieu
Deposited On:14 Jan 2016 10:59
Last Modified:10 May 2016 23:39

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