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Synergetic effects of thin plies and aligned carbon nanotube interlaminar reinforcement in composite laminates

Synergetic effects of thin plies and aligned carbon nanotube interlaminar reinforcement in composite laminates
Synergetic effects of thin plies and aligned carbon nanotube interlaminar reinforcement in composite laminates
Thin-ply carbon fiber laminates have exhibited superior mechanical properties and damage resistance when compared to standard thickness plies and enable greater flexibility in laminate design. However, the increased ply count in thin-ply laminates also increases the number of ply-ply interfaces, thereby increasing the number of relatively weak and delamination-prone interlaminar regions. In this study, we report the first experimental realization of aligned carbon nanotube interlaminar reinforcement of thin-ply unidirectional prepreg-based carbon fiber laminates, in a hierarchical architecture termed ‘nanostitching’. We synthesize a baseline effective standard thickness laminate using multiple thin plies of the same orientation to create a ply block, and we find an ~15% improvement in the interlaminar shear strength via short beam shear (SBS) testing for thin-ply nanostitched samples when compared to the baseline. This demonstrates a synergetic strength effect of nanostitching (~5% increase) and thin-ply lamination (~10% increase). Synchrotron-based computed tomography of post mortem SBS specimens suggests a different trajectory and mode of damage accumulation in nanostitched thin-ply laminates, notably the complete suppression of delaminations in the nanostitched region. Finite element predictions of damage progression highlight the complementary nature of positive thin-ply and nanostitching effects that are consistent with an ~15% improvement in Mode I and II interlaminar fracture toughness due to the aligned carbon nanotubes at the thin-ply interfaces.
Thin-ply laminate, Carbon Nanotube, Mechanical Properties, Finite element analysis
0266-3538
Kalfon-Cohen, Estelle
f23be8fb-88db-46e4-b258-c49fd977b87b
Kopp, Reed
b5a801fe-f1e2-406c-a070-73bac41796b3
Xinchen, Ni
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Arteiro, Albertino
dcfdf34b-22d8-429d-8a17-15ee46ef7eeb
Borstnar, Gregor
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Mavrogordato, Mark
f3e0879b-118a-463a-a130-1c890e9ab547
Sinclair, Ian
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Spearing, Mark Simon
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Camanho, Pedro P.
c96e1716-188d-43ca-b2a2-ce6b3e2d79e7
Wardle, Brian
0a84fa9e-ecae-434e-9e22-b4cfb026b9da
Kalfon-Cohen, Estelle
f23be8fb-88db-46e4-b258-c49fd977b87b
Kopp, Reed
b5a801fe-f1e2-406c-a070-73bac41796b3
Xinchen, Ni
44c5b899-603d-4fb3-a59c-507d94b40f7c
Arteiro, Albertino
dcfdf34b-22d8-429d-8a17-15ee46ef7eeb
Borstnar, Gregor
4b0498bf-6b1c-4e11-bd0a-7be326e8e837
Mavrogordato, Mark
f3e0879b-118a-463a-a130-1c890e9ab547
Sinclair, Ian
6005f6c1-f478-434e-a52d-d310c18ade0d
Spearing, Mark Simon
9e56a7b3-e0e8-47b1-a6b4-db676ed3c17a
Camanho, Pedro P.
c96e1716-188d-43ca-b2a2-ce6b3e2d79e7
Wardle, Brian
0a84fa9e-ecae-434e-9e22-b4cfb026b9da

Kalfon-Cohen, Estelle, Kopp, Reed, Xinchen, Ni, Arteiro, Albertino, Borstnar, Gregor, Mavrogordato, Mark, Sinclair, Ian, Spearing, Mark Simon, Camanho, Pedro P. and Wardle, Brian (2018) Synergetic effects of thin plies and aligned carbon nanotube interlaminar reinforcement in composite laminates Composites Science and Technology

Record type: Article

Abstract

Thin-ply carbon fiber laminates have exhibited superior mechanical properties and damage resistance when compared to standard thickness plies and enable greater flexibility in laminate design. However, the increased ply count in thin-ply laminates also increases the number of ply-ply interfaces, thereby increasing the number of relatively weak and delamination-prone interlaminar regions. In this study, we report the first experimental realization of aligned carbon nanotube interlaminar reinforcement of thin-ply unidirectional prepreg-based carbon fiber laminates, in a hierarchical architecture termed ‘nanostitching’. We synthesize a baseline effective standard thickness laminate using multiple thin plies of the same orientation to create a ply block, and we find an ~15% improvement in the interlaminar shear strength via short beam shear (SBS) testing for thin-ply nanostitched samples when compared to the baseline. This demonstrates a synergetic strength effect of nanostitching (~5% increase) and thin-ply lamination (~10% increase). Synchrotron-based computed tomography of post mortem SBS specimens suggests a different trajectory and mode of damage accumulation in nanostitched thin-ply laminates, notably the complete suppression of delaminations in the nanostitched region. Finite element predictions of damage progression highlight the complementary nature of positive thin-ply and nanostitching effects that are consistent with an ~15% improvement in Mode I and II interlaminar fracture toughness due to the aligned carbon nanotubes at the thin-ply interfaces.

Text SYNERGETIC EFFECTS OF THIN PLIES AND ALIGNED CARBON NANOTUBE INTERLAMINAR REINFORCEMENT IN COMPOSITE LAMINATES - Accepted Manuscript
Restricted to Repository staff only until 4 January 2019.
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More information

Accepted/In Press date: 4 January 2018
e-pub ahead of print date: 9 January 2018
Keywords: Thin-ply laminate, Carbon Nanotube, Mechanical Properties, Finite element analysis

Identifiers

Local EPrints ID: 416891
URI: http://eprints.soton.ac.uk/id/eprint/416891
ISSN: 0266-3538
PURE UUID: 278dff64-4c96-4113-a9dd-b14b6be0b232

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Date deposited: 12 Jan 2018 17:30
Last modified: 12 Jan 2018 17:30

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Contributors

Author: Estelle Kalfon-Cohen
Author: Reed Kopp
Author: Ni Xinchen
Author: Albertino Arteiro
Author: Gregor Borstnar
Author: Ian Sinclair
Author: Pedro P. Camanho
Author: Brian Wardle

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