Active multi-physical modulation of Poisson’s ratios in composite piezoelectric lattices: on-demand sign reversal
Active multi-physical modulation of Poisson’s ratios in composite piezoelectric lattices: on-demand sign reversal
A large number of studies have been reported in literature to analyse various parameters that influence the Poisson’s ratios of multi-functional lattice materials. However, the major limitation in such lattices is that once the lattice is manufactured, the Poisson’s ratios and other elastic properties become fixed corresponding to the particular lattice configuration. This limits the application of such lattices in many advanced multi-functional structures and systems, where on-demand active property modulations are warranted. This paper proposes composite lattices comprising a substrate and piezoelectric materials, wherein it is possible to actively modulate the Poisson’s ratios and other elastic properties as a function of voltage. Considering both axial and transverse deformations of the cell walls along with a unit cell based approach, the exact closed-form expressions of Poisson’s ratios and equivalent Young’s modulus are derived in an expanded design space for the unimorph and bimorph configurations. The study reveals that a sign reversal of the Poisson’s ratios and Young’s modulus can be achieved for specific combinations of cell angle and applied voltage. Contrary to the conventional wisdom, such active sign reversal implies that re-entrant honeycomb lattices can exhibit positive Poisson’s ratios and vice versa.
Active honeycomb lattices, Multi-functional piezoelectric lattices, On-demand sign reversal of elastic moduli, Poisson's ratio modulation
Singh, A.
f3cb05c7-52de-41f0-bb53-27252fa1f41d
Mukhopadhyay, T.
2ae18ab0-7477-40ac-ae22-76face7be475
Adhikari, S.
82960baf-916c-496e-aa85-fc7de09a1626
Bhattacharya, B.
c3f6b49e-3efa-415a-88b1-ae4f108ad70d
6 December 2021
Singh, A.
f3cb05c7-52de-41f0-bb53-27252fa1f41d
Mukhopadhyay, T.
2ae18ab0-7477-40ac-ae22-76face7be475
Adhikari, S.
82960baf-916c-496e-aa85-fc7de09a1626
Bhattacharya, B.
c3f6b49e-3efa-415a-88b1-ae4f108ad70d
Singh, A., Mukhopadhyay, T., Adhikari, S. and Bhattacharya, B.
(2021)
Active multi-physical modulation of Poisson’s ratios in composite piezoelectric lattices: on-demand sign reversal.
Composite Structures, 280, [114857].
(doi:10.1016/j.compstruct.2021.114857).
Abstract
A large number of studies have been reported in literature to analyse various parameters that influence the Poisson’s ratios of multi-functional lattice materials. However, the major limitation in such lattices is that once the lattice is manufactured, the Poisson’s ratios and other elastic properties become fixed corresponding to the particular lattice configuration. This limits the application of such lattices in many advanced multi-functional structures and systems, where on-demand active property modulations are warranted. This paper proposes composite lattices comprising a substrate and piezoelectric materials, wherein it is possible to actively modulate the Poisson’s ratios and other elastic properties as a function of voltage. Considering both axial and transverse deformations of the cell walls along with a unit cell based approach, the exact closed-form expressions of Poisson’s ratios and equivalent Young’s modulus are derived in an expanded design space for the unimorph and bimorph configurations. The study reveals that a sign reversal of the Poisson’s ratios and Young’s modulus can be achieved for specific combinations of cell angle and applied voltage. Contrary to the conventional wisdom, such active sign reversal implies that re-entrant honeycomb lattices can exhibit positive Poisson’s ratios and vice versa.
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More information
Accepted/In Press date: 17 October 2021
e-pub ahead of print date: 10 November 2021
Published date: 6 December 2021
Additional Information:
Funding Information:
The authors acknowledge the financial support from Visvesvaraya PhD scheme, Media Lab Asia, Ministry of Electronics and Information Technology, Government of India , through a scholarship (Unique Awardee Number MEITY-PHD-888 ) and SPARC project (MHRD /ME /2018544). TM acknowledges the grant received from SERB, India ( SRG/2020/001398 ). SA acknowledges the support of the UK-India Education and Research Initiative, United Kingdom through grant number UKIERI/P1212 . The authors would also like to thank Prof. N. Tiwari (IIT Kanpur) for supporting the numerical validation using finite element software.
Keywords:
Active honeycomb lattices, Multi-functional piezoelectric lattices, On-demand sign reversal of elastic moduli, Poisson's ratio modulation
Identifiers
Local EPrints ID: 477118
URI: http://eprints.soton.ac.uk/id/eprint/477118
ISSN: 0263-8223
PURE UUID: a66994d3-3b03-46f1-84e2-430253f8546d
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Date deposited: 30 May 2023 16:30
Last modified: 17 Mar 2024 04:18
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Contributors
Author:
A. Singh
Author:
T. Mukhopadhyay
Author:
S. Adhikari
Author:
B. Bhattacharya
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