Foreshadowing elastic instabilities by negative group velocity in soft composites
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slesarenkoetal18apl.pdf
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Author(s)
Slesarenko, Viacheslav
Galich, Pavel I.
Li, Jian
Fang, Xuanlai
Rudykh, Stephan
Date Issued
July 2018
Journal
Applied Physics Letters
Publisher
AIP Publishing
Citation
Slesarenko, Viacheslav et al. "Foreshadowing elastic instabilities by negative group velocity in soft composites." Applied Physics Letters 113 (July 2018): 031901 © 2018 Author(s)
Version
Final published version
Abstract
We reveal the existence of a state in soft composites, characterized by the omni-directional negative group velocity in the vicinity of elastic instability. We show that the appearance of the negative group velocity in layered and fibrous composites foreshadows microscopic loss of the stability. In contrast with classical instability-induced pattern transformations, the transition between states with positive and negative group velocities is not accompanied by geometrical rearrangements and can be triggered by very fine variation of the compressive deformation in stable composites. Finally, we analyze the effect of the geometrical characteristics and elastic moduli of the constituents on the strain range for induced state with negative group velocities.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1063/1.5042077
