Journal
MATERIALS LETTERS
Volume 262, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2019.127072
Keywords
Programmable; Negative stiffness; Mechanical metamaterial; Stable-state transformation
Funding
- National Natural Science Foundation of China [11972008]
- Innovation Project of New Energy Vehicle and Intelligent Connected Vehicle
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Programmable mechanical metamaterials, whose properties would vary once their service environment changed, have a great prospect in many application scenarios. In this paper, a novel buckling-based negative stiffness (NS) mechanical metamaterial, consisting of pre-compressed elastic curved beams, is proposed, and its mechanical properties can be programmed by lateral confinement. Experiments and numerical simulations were both conducted to investigate its mechanical properties. Research results showed that multi-stability of the proposed NS metamaterial was programmable and it could be applied to tune the elastic wave propagation. Moreover, some improvement was made to simplify the structure and increase the efficiency of programming process. (C) 2019 Elsevier B.V. All rights reserved.
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