Imperial College London
Alternate

Professor Koon-Yang Lee

Faculty of Engineering, Department of Aeronautics

Professor in Polymer Engineering
 
 
 
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Contact

 

+44 (0)20 7594 5150koonyang.lee

 
 
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Location

 

325City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Song:2019:10.1016/j.compscitech.2019.107871,
author = {Song, W and Konstantellos, G and Li, D and Lee, K-Y},
doi = {10.1016/j.compscitech.2019.107871},
journal = {Composites Science and Technology},
pages = {1--9},
title = {Short carbon fibre-reinforced epoxy foams with isotropic cellular structure and anisotropic mechanical response produced from liquid foam templates},
url = {http://dx.doi.org/10.1016/j.compscitech.2019.107871},
volume = {184},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - In this work, we show that mechanically anisotropic short carbon fibre (sCF)-reinforced epoxy foams with an isotropic cellular structure can be fabricated from liquid foam templates. Short carbon fibres were mechanically frothed in an uncured liquid epoxy resin to produce an air-in-resin liquid foam template, followed by subsequent polymerisation. Fracture toughness test showed that the incorporation of short carbon fibres into the epoxy foams led to a significant increase in their critical stress intensity factors. It was also observed that neat epoxy foams failed catastrophically whilst sCF-reinforced epoxy foams failed in a progressive manner. Compression test further showed that the in-plane compressive moduli of the mechanically frothed sCF-reinforced epoxy foams were significantly higher than their out-of-plane compressive moduli, signifying an anisotropic mechanical response. This anisotropic mechanical response stemmed from the radial flow generated by the high intensity mechanical frothing process, facilitating the preferential orientation of the added short carbon fibres in-plane whilst the entrained air bubbles during the mechanical frothing process were in equilibrium with the surrounding uncured liquid epoxy resin, resulting in an epoxy foam with an isotropic (spherical) cellular structure.
AU  - Song,W
AU  - Konstantellos,G
AU  - Li,D
AU  - Lee,K-Y
DO  - 10.1016/j.compscitech.2019.107871
EP  - 9
PY  - 2019///
SN  - 0266-3538
SP  - 1
TI  - Short carbon fibre-reinforced epoxy foams with isotropic cellular structure and anisotropic mechanical response produced from liquid foam templates
T2  - Composites Science and Technology
UR  - http://dx.doi.org/10.1016/j.compscitech.2019.107871
UR  - https://www.sciencedirect.com/science/article/pii/S0266353819313144?via%3Dihub
UR  - http://hdl.handle.net/10044/1/75582
VL  - 184
ER  -
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