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Active mechanical cloaking for unsupervised damage resilience in programmable elastic metamaterials

Active mechanical cloaking for unsupervised damage resilience in programmable elastic metamaterials
Active mechanical cloaking for unsupervised damage resilience in programmable elastic metamaterials

Owing to the architected void-filled low-density configurations, metamaterials are prone to defects during the complex manufacturing process, or damages under operational conditions. Recently mechanical cloaking has been proposed to shield the effect of such disorders in terms of homogenized mechanical responses. The major drawback in these studies are that the damage location should be known a priori, and the cloak is designed around that damaged zone before manufacturing. Such postulation does not allow unsupervised damage resilience during the manufacturing and service life of metamaterials by active reconfiguration of the stress field depending on the random and unpredictable evolution of damage. Here, we propose a radically different approach by introducing piezoelectric lattices where the effect of random appearance of any single or multiple disorders and damages with complex shapes, sizes and distributions can be shielded through active multi-physically controlled cloaks by voltage-dependent modulation of the stress fields within the cloaking region. Notably, this can be achieved without breaking periodicity and any additional material in the cloaking region unlike earlier studies concerning mechanical cloaks. The proposed active class of elastic metamaterials will bring a step-change in the on-demand mechanical performance of critically important structural components and unsupervised damage resilience for enhanced durability and sustainability.
1364-503X
Kundu, D.
ab07ae2d-7ccd-4a77-82ad-e1e318fa2d93
Naskar, Susmita
5f787953-b062-4774-a28b-473bd19254b1
Mukhopadhyay, Tanmoy
2ae18ab0-7477-40ac-ae22-76face7be475
Kundu, D.
ab07ae2d-7ccd-4a77-82ad-e1e318fa2d93
Naskar, Susmita
5f787953-b062-4774-a28b-473bd19254b1
Mukhopadhyay, Tanmoy
2ae18ab0-7477-40ac-ae22-76face7be475

Kundu, D., Naskar, Susmita and Mukhopadhyay, Tanmoy (2024) Active mechanical cloaking for unsupervised damage resilience in programmable elastic metamaterials. Philosophical Transactions of The Royal Society A, 382 (2278). (doi:10.1098/rsta.2023.0360).

Record type: Article

Abstract


Owing to the architected void-filled low-density configurations, metamaterials are prone to defects during the complex manufacturing process, or damages under operational conditions. Recently mechanical cloaking has been proposed to shield the effect of such disorders in terms of homogenized mechanical responses. The major drawback in these studies are that the damage location should be known a priori, and the cloak is designed around that damaged zone before manufacturing. Such postulation does not allow unsupervised damage resilience during the manufacturing and service life of metamaterials by active reconfiguration of the stress field depending on the random and unpredictable evolution of damage. Here, we propose a radically different approach by introducing piezoelectric lattices where the effect of random appearance of any single or multiple disorders and damages with complex shapes, sizes and distributions can be shielded through active multi-physically controlled cloaks by voltage-dependent modulation of the stress fields within the cloaking region. Notably, this can be achieved without breaking periodicity and any additional material in the cloaking region unlike earlier studies concerning mechanical cloaks. The proposed active class of elastic metamaterials will bring a step-change in the on-demand mechanical performance of critically important structural components and unsupervised damage resilience for enhanced durability and sustainability.

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Mechanical_cloaking - Accepted Manuscript
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Accepted/In Press date: 12 February 2024
e-pub ahead of print date: 29 July 2024
Published date: 9 September 2024

Identifiers

Local EPrints ID: 490501
URI: http://eprints.soton.ac.uk/id/eprint/490501
ISSN: 1364-503X
PURE UUID: fceb19c6-a986-4e28-8b07-068075d22ffd
ORCID for Susmita Naskar: ORCID iD orcid.org/0000-0003-3294-8333

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Date deposited: 29 May 2024 16:32
Last modified: 18 Oct 2025 02:04

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Contributors

Author: D. Kundu
Author: Susmita Naskar ORCID iD
Author: Tanmoy Mukhopadhyay

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