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Towards virtual material characterisation of unidirectional composites with microscopic simulations

Vinot, Mathieu and Holzapfel, Martin and Toso, Nathalie (2019) Towards virtual material characterisation of unidirectional composites with microscopic simulations. 1st European Conference on Crashworthiness of Composite Structures - ECCCS-1, 19.-21. Nov. 2019, Belfast, Irland.

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Abstract

This paper reports on the experimental and numerical investigation of IM7/8552 unidirectional composites. Polished composite samples have been investigated using an optical microscope and an automatized algorithm for pattern recognition to determine the distribution of radius and inter-fibre distance. Based on the obtained parameters, multiple unit cells have been generated and virtually loaded in tension, compression and shear to generate material properties while taking into account stochastic effects. To reduce computing time, several parameters such as unit cell size, mesh fineness or boundary conditions have been investigated beforehand. In a second time, material models available in LS-DYNA have been compared with focus on computational effectivity and result accuracy. Moreover, effect of loading rate on unidirectional properties has been investigated. Compared to experimentally-measured mechanical parameters, first numerical results show a promising path towards a predictive tool for unidirectional composites.

Item URL in elib:https://elib.dlr.de/131704/
Document Type:Conference or Workshop Item (Speech)
Title:Towards virtual material characterisation of unidirectional composites with microscopic simulations
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Vinot, MathieuMathieu.Vinot (at) dlr.dehttps://orcid.org/0000-0003-3394-5142
Holzapfel, MartinMartin.Holzapfel (at) dlr.deUNSPECIFIED
Toso, NathalieNathalie.Toso (at) dlr.dehttps://orcid.org/0000-0003-2803-1450
Date:2019
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Composites, microscopic simulation, Virtual Testing, LS-DYNA
Event Title:1st European Conference on Crashworthiness of Composite Structures - ECCCS-1
Event Location:Belfast, Irland
Event Type:international Conference
Event Dates:19.-21. Nov. 2019
Organizer:Queen's University Belfast
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Road Transport
DLR - Research area:Transport
DLR - Program:V ST Straßenverkehr
DLR - Research theme (Project):V - NGC Fahrzeugstruktur II
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Structural Integrity
Deposited By: Vinot, Mathieu
Deposited On:29 Nov 2019 14:05
Last Modified:20 Mar 2020 11:17

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