Imperial College London
Alternate

John P. Dear FREng

Faculty of Engineering, Department of Mechanical Engineering

Professor of Mechanical Engineering
 
 
 
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Contact

 

j.dear Website

 
 
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Location

 

520City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zhou:2023:10.1016/j.ijmecsci.2022.108054,
author = {Zhou, J and Liu, H and Dear, JP and Falzon, BG and Kazanc, Z},
doi = {10.1016/j.ijmecsci.2022.108054},
journal = {International Journal of Mechanical Sciences},
pages = {1--16},
title = {Comparison of different quasi-static loading conditions of additively manufactured composite hexagonal and auxetic cellular structures},
url = {http://dx.doi.org/10.1016/j.ijmecsci.2022.108054},
volume = {244},
year = {2023}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Auxetic cellular structures have the potential to revolutionise sandwich panel cores due to their potential superior energy absorption capability. Because of their negative Poisson's ratio, auxetics behave counterintuitively and contract orthogonally under an applied compressive force, resulting in a densification of material in the vicinity of the applied load. This study investigates three cellular structures and compares their compressive energy absorbing characteristics under in-plane and axial loading conditions. Three unit cell topologies are considered; a conventional hexagonal, re-entrant and double arrowhead auxetic structures. The samples were additively manufactured using two different materials, a conventional Nylon and a carbon fibre reinforced composite alternative (Onyx). Finite element simulations are experimentally validated under out of and in-plane loading conditions and the double arrowhead (auxetic) structure is shown to exhibit comparatively superior energy absorption. For the carbon fibre reinforced material, Onyx, the specific energy absorbed by the double arrowhead geometry was 125% and 244% greater than the hexagonal (non-auxetic) and re-entrant (auxetic) structures respectively.
AU  - Zhou,J
AU  - Liu,H
AU  - Dear,JP
AU  - Falzon,BG
AU  - Kazanc,Z
DO  - 10.1016/j.ijmecsci.2022.108054
EP  - 16
PY  - 2023///
SN  - 0020-7403
SP  - 1
TI  - Comparison of different quasi-static loading conditions of additively manufactured composite hexagonal and auxetic cellular structures
T2  - International Journal of Mechanical Sciences
UR  - http://dx.doi.org/10.1016/j.ijmecsci.2022.108054
UR  - https://www.sciencedirect.com/science/article/pii/S0020740322009328?via%3Dihub
UR  - http://hdl.handle.net/10044/1/101517
VL  - 244
ER  -
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