3-3 piezoelectric metamaterial with negative and zero Poisson's ratio for hydrophones applications

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dc.contributor.authorKhan, Kamran Ahmed
dc.contributor.authorKhan, Muhammad Ali
dc.date.accessioned2019-09-18T10:38:43Z
dc.date.available2019-09-18T10:38:43Z
dc.date.issued2018-12-18
dc.description.abstractThis study presents the electromechanical properties of the 3-3 piezoelectric metamaterial based on variants of honeycomb (HC) structure. Three kinds of three-dimensional (3D) elastically anisotropic and piezoelectrically active HC structures were introduced, namely, conventional HC (3D-CHC), a re-entrant HC (3D-RE) and a semi-re-entrant HC (3D-SRE). Highly porous 3D finite element models of the mentioned three kinds of metamaterials were developed and the role of ligament orientation on their effective elastic, piezoelectric and dielectric properties was completely characterized. The intrinsic symmetry of HC structure was utilized and simplified mixed boundary conditions equivalent to periodic boundary conditions were recognized. In comparison to their bulk constituent, all the 3-3 type piezoelectric HC networks exhibited an enhanced response, especially for the longitudinal poling. The normalized figures of merit show a mild dependence on the angle θ and the underlying deformation mechanisms associated with the zero, positive and negative Poisson’s ratios. Figures of merit such as hydrostatic strain coefficient (dh" role="presentation">), the hydrostatic figure of merit (dh.gh" role="presentation">) and the acoustic impedance (Z" role="presentation">) reached their best values at small angles, i.e., θ = 30°. Longitudinally poled networks exhibited four order of magnitude increase in their hydrostatic figure of merit (foam to solid ratio >10,000) and one order of magnitude decrease in the acoustic impedance indicating their applicability for the design of hydrophones.en_UK
dc.identifierhttps://dspace.lib.cranfield.ac.uk/handle/1826/14543
dc.identifier.citationKhan KA, Khan M. (2019) 3-3 piezoelectric metamaterial with negative and zero Poisson's ratio for hydrophones applications. Materials Research Bulletin, Volume 112, April 2019, pp.194-204en_UK
dc.identifier.cris24416217
dc.identifier.issn0025-5408
dc.identifier.urihttps://doi.org/10.1016/j.materresbull.2018.12.016
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/14543
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectHoney comb structuresen_UK
dc.subjectMetamaterialsen_UK
dc.subjectCellular materialsen_UK
dc.subjectElectromechanical propertiesen_UK
dc.subjectPiezoelectric materialsen_UK
dc.subjectUnit cell Methoden_UK
dc.subjectAuxetic smart structureen_UK
dc.title3-3 piezoelectric metamaterial with negative and zero Poisson's ratio for hydrophones applicationsen_UK
dc.typeArticleen_UK

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