Raman spectroscopic stress mapping of carbon nanotube coated single high modulus carbon fibres in compression
File(s)
Published version
Author(s)
Woodgate, Cameron G
Anthony, David B
Trask, Richard S
Shaffer, Milo SP
Eichhorn, Stephen J
Type
Journal Article
Abstract
Single walled carbon nanotubes (SWCNTs) can be introduced onto the surface of carbon fibres to modulate stress transfer, introduce functionality, or act as local mechanical sensors. This study explores the effects of such a coating on the micromechanics of single fibre epoxy composites, under compression, using in situ Raman spectroscopy to obtain local and spatial stress maps. These maps can be analysed to quantify interfacial shear stress and show that the introduction of the SWCNTs increases the maximum interfacial shear stress of this carbon fibre epoxy system (M55/M46-DGEBA) from 23 MPa to 45 MPa. There is a corresponding decrease in the critical stress transfer length (from 420 μm to 252 μm), verified by optically measuring mean fragment lengths. The use of SWCNTs as a means to enhance the compressive properties of bulk carbon fibre-based composites is discussed, in the light of these new micromechanics results.
Date Issued
2025-09-29
Date Acceptance
2025-07-05
Citation
Composites Science and Technology, 2025, 270
ISSN
0266-3538
Publisher
Elsevier
Journal / Book Title
Composites Science and Technology
Volume
270
Copyright Statement
© 2025 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
License URL
Publication Status
Published
Article Number
111283
Date Publish Online
2025-07-06