Magnetically Assisted Rotationally Multistable Metamaterials for Tunable Energy Trapping–Dissipation

Alireza Seyedkanani; Abdolhamid Akbarzadeh

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Magnetically Assisted Rotationally Multistable Metamaterials for Tunable Energy Trapping–Dissipation

机译：Magnetically Assisted Rotationally Multistable Metamaterials for Tunable Energy Trapping–Dissipation

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A motif for rotational multistability is developed by arranging permanentmagnets in a circular pattern and creating magnet pairs with magneticallyinduced negative incremental torsional stiffness. Through a set of experimentaland numerical studies, different means to tailor the torsional responseof a rotational magnet pair are demonstrated. A magnet pair in tandem withtilted elastic arms is harnessed to form an energy-trapping rotational unitcell. By stacking several of these unit cells upon each other, a 1D rotationallymultistable metamaterial capable of storing the input energy and releasing itin the form of rotational waves is developed. The periodic stable equilibriumstates in rotational magnet pairs invoke the notion of cyclic multistability,which is employed here to realize, for the first time, a tunable fluid-free rotarymetadamper with energy dissipation induced by repeating snap-back instabilities.High tunability of magnetic interactions offers a new design paradigmfor developing reusable energy dissipative and energy trapping rotarymetamaterials, the properties of which can be easily tailored in situ and evenat the post-fabrication stage.

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来源
《Advanced functional materials》 |2022年第52期|2207581.1-2207581.12|共12页
作者
Alireza Seyedkanani; Abdolhamid Akbarzadeh;
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作者单位

Department of Bioresource EngineeringMcGill UniversityMontreal, QC H9X 3V9, Canada;

Department of Bioresource EngineeringMcGill UniversityMontreal, QC H9X 3V9, Canada,Department of Mechanical EngineeringMcGill UniversityMontreal, QC H3A 0C3, Canada;

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正文语种英语
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energy dissipation; energy trapping; magnetic systems; rotationally multistable metamaterials; snap-back instability;

Magnetically Assisted Rotationally Multistable Metamaterials for Tunable Energy Trapping–Dissipation

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