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Akrami, R, Fotouhi, S, Fotouhi, M, Bodaghi, M 
ORCID: https://orcid.org/0000-0002-0707-944X, Clamp, J and Bolouri, A,
2019.
High-performance bio-inspired composite T-joints.
Composites Science and Technology, 184: 107840.
ISSN 0266-3538
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Abstract
This paper introduces a novel bio-inspired design strategy based on the optimised topology of bird bone's joint to improve the strength-to-weight ratio and damage tolerance of composite T-joints. Better structuring the constituents' materials near the sharp bends results in re-distribution of stress over a larger area and reduces the stress concentration. This is done by an integrally formed support structure that is spaced apart from the main body of the T-joint in the vicinity of the bend using a Polyvinyl Chloride (PVC) foam. The support structure acts as a buttress across the bend and improves the performance of the T-joint. The T-joints are fabricated using wet layup process, from 2/2 twill TC35-carbon fibre fabric/SR5550 epoxy resin, and are subjected to quasi-static and fatigue bending, and quasi-static tensile pull-out tests. The quasi-static results reveal that the bio-inspired T-joint design has huge improvements compared to a conventional T-joint in the elastic stiffness (over 60%), peak load (over 40%) and absorbed mechanical energy (over 130%). There is only 3% weight increase in the bio-inspired T-joint compared to the conventional one. The fatigue results show a significant improvement for the bio-inspired design proving the efficiency of the novel bio-inspired design for both quasi-static and cyclic loadings.
| Item Type: | Journal article |
|---|---|
| Publication Title: | Composites Science and Technology |
| Creators: | Akrami, R., Fotouhi, S., Fotouhi, M., Bodaghi, M., Clamp, J. and Bolouri, A. |
| Publisher: | Elsevier |
| Date: | 15 October 2019 |
| Volume: | 184 |
| ISSN: | 0266-3538 |
| Identifiers: | Number Type 10.1016/j.compscitech.2019.107840 DOI S0266353819324170 Publisher Item Identifier 1120607 Other |
| Divisions: | Schools > School of Science and Technology |
| Record created by: | Jonathan Gallacher |
| Date Added: | 01 Oct 2019 08:33 |
| Last Modified: | 22 Jul 2021 09:45 |
| URI: | https://irep.ntu.ac.uk/id/eprint/37887 |
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