Journal
DEFENCE TECHNOLOGY
Volume 18, Issue 8, Pages 1301-1310Publisher
KEAI PUBLISHING LTD
DOI: 10.1016/j.dt.2021.07.014
Keywords
Buckling induced meta -lattice structure; (BIMS); Crushing force ef ficiency
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Funding
- National Natural Science Foundation of China [11972184, U20A20286]
- China National Key Laboratory Foundation of Science and Technology on Materials under Shock and Impact [6142902200203]
- Natural Science Foundation of Jiangsu Province of China [BK20201286]
- Science and Technology Project of Jiangsu Province of China [BE2020716]
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This paper investigates the crushing behavior and energy absorption of buckling induced meta-lattice structures. The results show that introducing buckling pattern can substantially improve the performance of the structure.
Thin-walled lattice materials can be applied as energy absorbers in protective structures of civil defense. In this paper, quasi-static in-plane crushing tests were carried out to investigate the crushing behavior and energy absorption of buckling induced meta-lattice structures (BIMSs) with different central angles made of plastic iron material DT3 and formed by wire cutting technique. Three crushing patterns were revealed and analyzed. The test results clearly show that the initial peak force (IPF), the crushing force efficiency (CFE), the specific energy absorption (SEA) and the mean crushing force (MCF) can be sub-stantially improved by introducing buckling pattern into the straight-walled lattice structure. The MCF of the BIMS was consistently predicted based on the simplified super folding element (SSFE) and the flattening element.(c) 2021 China Ordnance Society. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).
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