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Improved crush energy absorption in 3D woven composites by pick density modification

Neale, Geoffrey and Dahale, Monali and Yoo, Sanghyun and Toso, Nathalie and McGarrigle, Cormac and Quinn, Justin and Kelly, John and McIlhagger, Alistair and Archer, Edward and Harkin-Jones, Eileen (2020) Improved crush energy absorption in 3D woven composites by pick density modification. Composites Part B Engineering, 192 (1). Elsevier. doi: 10.1016/j.compositesb.2020.108007. ISSN 1359-8368.

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Although 3D woven composites have exceptional out-of-plane properties, there is a lack of understanding for these materials in crash application in automotive and aerospace industries. To encourage the use of 3D wovens in crashworthy automotive structures, knowledge must be gained so that designers can adjust the highly flexible weave parameters to create tailor-made performance materials. Here we show that fabric pick density causes large changes in progressive failure modes and associated energy absorption, particularly in the dynamic regime, where the quasi-static to dynamic energy absorption loss typical of composites is completely removed. Compression and flexure properties, which are known to be linked to crash performance in composites, are also investigated for these 3D woven layer-to-layer interlock carbon-epoxy composite structures. 3D fabric preforms are manufactured in three different pick densities: 4, 10 & 16 wefts/cm. With a constant warp density of 12 warps/cm from carbon fibres. Increasing the pick density improved specific energy absorption (SEA) even in relatively inefficient progressive failure modes like folding, which has not previously observed in composite materials. SEA values up to 104 J/g (quasi-static) and 93 J/g (dynamic) are recorded. This work shows that minor weft direction (transverse) weave changes can lead to sizeable improvements in warp direction (axial) energy absorption without fundamentally redesigning the weave architecture.

Item URL in elib:https://elib.dlr.de/139135/
Document Type:Article
Title:Improved crush energy absorption in 3D woven composites by pick density modification
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Neale, GeoffreyUlster UniversityUNSPECIFIED
Dahale, MonaliUlster UniversityUNSPECIFIED
Yoo, SanghyunUNSPECIFIEDhttps://orcid.org/0000-0001-6924-1716
Toso, NathalieUNSPECIFIEDhttps://orcid.org/0000-0003-2803-1450
McGarrigle, CormacUlster UniversityUNSPECIFIED
Quinn, JustinUlster UniversityUNSPECIFIED
Kelly, JohnUlster UniversityUNSPECIFIED
McIlhagger, AlistairUlster UniversityUNSPECIFIED
Archer, EdwardUlster UniversityUNSPECIFIED
Harkin-Jones, EileenUlster UniversityUNSPECIFIED
Date:25 March 2020
Journal or Publication Title:Composites Part B Engineering
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:Yes
Keywords:3-Dimensional reinforcement; Impact behaviour; Weaving; Energy absorption
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials (old)
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Structural Integrity
Deposited By: Yoo, Sanghyun
Deposited On:07 Jan 2021 12:47
Last Modified:20 Jun 2021 15:54

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