Crushing behaviors of buckling-induced metallic meta-lattice structures

Received: 14 June 2022, Revised: 16 June 2022, Accepted: 09 Aug 2022, Available online: 28 Sep 2022, Version of Record: 28 Sep 2022

Jian-hua Dong a, Yong-jun Wang c, Feng-nian Jin a, Hua-lin Fan b c
a
State Key Laboratory for Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing, 210007, China
b
Department of Civil Engineering, Nanyang Institute of Technology, Nanyang, 473004, China
c
State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China

Abstract


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 substantially 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.

Keywords
Buckling induced meta-lattice structure (BIMS)
Crushing force efficiency



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“Authors state no conflict of interest”


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