Show simple item record

dc.contributor.authorMéndez, Carlos Alberto
dc.contributor.authorPodestá, J.M.
dc.contributor.authorLloberas Valls, Oriol
dc.contributor.authorToro, Sebastian
dc.contributor.authorHuespe, Alfredo Edmundo
dc.contributor.authorOliver Olivella, Xavier
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Civil i Ambiental
dc.date.accessioned2017-11-21T14:04:22Z
dc.date.available2017-11-21T14:04:22Z
dc.date.issued2017-12
dc.identifier.citationMendez, C., Podestá, J., Lloberas-Valls, O., Toro, S., Huespe, A., Oliver, J. Computational material design for acoustic cloaking. "International journal for numerical methods in engineering", Desembre 2017, vol. 112, núm. 10, p. 1353-1380.
dc.identifier.issn0029-5981
dc.identifier.urihttp://hdl.handle.net/2117/110986
dc.description.abstractA topology optimization technique based on the topological derivative and the level set function is utilized to design/synthesize the micro-structure of a pentamode material for an acoustic cloaking device. The technique provides a micro-structure consisting of a honeycomb lattice composed of needle-like and joint members. The resulting metamaterial shows a highly anisotropic elastic response with effective properties displaying a ratio between bulk and shear moduli of almost 3 orders of magnitude. Furthermore, in accordance with previous works in the literature, it can be asserted that this kind of micro-structure can be realistically fabricated. The adoption of a topology optimization technique as a tool for the inverse design of metamaterials with applications to acoustic cloaking problems is one contribution of this paper. However, the most important achievement refers to the analysis and discussion revealing the key role of the external shape of the prescribed domain where the optimization problem is posed. The efficiency of the designed micro-structure is measured by comparing the scattering wave fields generated by acoustic plane waves impinging on bare and cloaked bodies.
dc.format.extent28 p.
dc.language.isoeng
dc.publisherJohn Wiley & Sons
dc.rightsAttribution 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Física::Acústica
dc.subjectÀrees temàtiques de la UPC::Matemàtiques i estadística::Topologia
dc.subject.lcshMetamaterials--Acoustic properties
dc.subject.othertransformation acoustic applications
dc.subject.otheracoustic cloak
dc.subject.otherpentamode material
dc.subject.othertopological derivative
dc.subject.othertopology optimization
dc.subject.otherextremal material
dc.subject.otherCOMP-DES-MAT Project
dc.subject.otherCOMPDESMAT Project
dc.titleComputational material design for acoustic cloaking
dc.typeArticle
dc.subject.lemacMetamaterials
dc.subject.lemacAcústica
dc.contributor.groupUniversitat Politècnica de Catalunya. RMEE - Grup de Resistència de Materials i Estructures en l'Enginyeria
dc.identifier.doi10.1002/nme.5560
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://onlinelibrary.wiley.com/doi/10.1002/nme.5560/abstract
dc.rights.accessOpen Access
local.identifier.drac20083568
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/FP7/320815/EU/Advanced tools for computational design of engineering materials/COMP-DES-MAT
local.citation.authorMendez, C.; Podestá, J.; Lloberas-Valls, O.; Toro, S.; Huespe, A.; Oliver, J.
local.citation.publicationNameInternational journal for numerical methods in engineering
local.citation.volume112
local.citation.number10
local.citation.startingPage1353
local.citation.endingPage1380


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

Attribution 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution 3.0 Spain