Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/76226
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Type: | Journal article |
Title: | Strength enhancement of aluminium honeycombs caused by entrapped air underdynamic out-of-plane compression |
Author: | Xu, S. Beynon, J. Ruan, D. Yu, T. |
Citation: | International Journal of Impact Engineering, 2012; 47:1-13 |
Publisher: | Pergamon-Elsevier Science Ltd |
Issue Date: | 2012 |
ISSN: | 0734-743X 1879-3509 |
Statement of Responsibility: | S. Xu, J.H. Beynon, D. Ruan, T.X. Yu |
Abstract: | The out-of-plane crushing behaviour of aluminium hexagonal honeycombs containing different percentages of holes (i.e., the fraction of penetrated cells to the total) was extensively investigated over a wide range of strain rates where each test was conducted at constant compression velocity. Strength enhancement due to the increase of the strain rate and the entrapped air was studied. It is found that the strain hardening of honeycomb structures during the dynamic crush is mostly attributed to the pressure change caused by the entrapped air. The leaking rate, δ̇, was then studied and found to be dependent on the strain and strain rate, and independent of the wall thickness to edge length ratio, t/l. An empirical constitutive relation describing the plastic collapse stress in relation to the t/l ratio, the strain and strain rate is proposed, which agrees well with the experimental results. © 2012 Elsevier Ltd. All rights reserved. |
Keywords: | Aluminium hexagonal honeycombs Out-of-plane compression Strain rate effect Entrapped air Constitutive relation |
Rights: | Crown Copyright © 2012 Published by Elsevier Ltd. All rights reserved. |
DOI: | 10.1016/j.ijimpeng.2012.02.008 |
Published version: | http://dx.doi.org/10.1016/j.ijimpeng.2012.02.008 |
Appears in Collections: | Aurora harvest Mechanical Engineering conference papers |
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hdl_76226.pdf | Accepted version | 871.15 kB | Adobe PDF | View/Open |
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