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Investigations on the multistability of series-connected unsymmetric laminates

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cris.virtual.departmentIndian Institute of Technology, Madras
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dc.contributor.authorKumar, A. Phanendra
dc.contributor.authorAnilkumar, P. M.
dc.contributor.authorHaldar, A.
dc.contributor.authorScheffler, S.
dc.contributor.authorDorn, O.
dc.contributor.authorB Nageswara Rao
dc.contributor.authorRolfes, R.
dc.date.accessioned2023-09-19T13:38:41Z
dc.date.available2023-09-19T13:38:41Z
dc.date.issued20-10-2022
dc.description.abstractMultistable composite shells have received great attention in shape-changing morphing applications due to their ability to attain more than one stable shape when cooled down from curing to room temperature. However, an individual bistable shell may not completely fulfil all the requirements of a morphing structure as they may require more than two stable states during the morphing action. Also, on several occasions, cylindrical bistable shapes can be found to be limiting for morphing applications. Therefore, studies on highly multistable non-cylindrical shapes are a subject of interest. In this study, we explore how unsymmetric laminates connected in series can result in an increased number of stable shapes. To analyze series-connected laminates, a semi-analytical model is developed using the Rayleigh-Ritz approach. The shapes predicted by the semi-analytical model have been validated using the results from a full geometrically non-linear finite element model and corresponding experimental results. A further enhancement in the design space of series-connected laminates is proposed by replacing the conventional cross-ply laminate with curvilinear fiber variable stiffness (VS) laminates as they allow the designer to tailor stiffness properties. Although VS laminates can be used to generate the similar stable configurations as that of conventional cross-ply laminates, they may result in different curvature values leading to tailored snap-through requirements. The developed finite element model is extended to account for unsymmetric variable stiffness laminates, where effect of curvilinear fiber alignment on the multistable design space is investigated.
dc.identifier.doi10.1016/j.compscitech.2022.109635
dc.identifier.issn2663538
dc.identifier.scopus2-s2.0-85137651556
dc.identifier.urihttps://apicris.irins.org/handle/IITM2023/22579
dc.relation.ispartofseriesComposites Science and Technology
dc.sourceComposites Science and Technology
dc.subjectBistability
dc.subjectComposites
dc.subjectMultistability
dc.subjectSemi-analytical
dc.subjectSnap-through
dc.subjectVariable stiffness
dc.titleInvestigations on the multistability of series-connected unsymmetric laminates
dc.typeJournal
dspace.entity.typePublication
oaire.citation.volume229
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oairecerif.author.affiliation#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliation#PLACEHOLDER_PARENT_METADATA_VALUE#
oairecerif.author.affiliationIndian Institute of Technology, Madras
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person.affiliation.cityChennai
person.affiliation.cityVaranasi
person.affiliation.cityHannover
person.affiliation.id60025757
person.affiliation.id60019106
person.affiliation.id60004935
person.affiliation.nameIndian Institute of Technology Madras
person.affiliation.nameIndian Institute of Technology (BHU) Varanasi
person.affiliation.nameGottfried Wilhelm Leibniz Universität Hannover
person.identifier.scopus-author-id57221461647
person.identifier.scopus-author-id57205495260
person.identifier.scopus-author-id35787867100
person.identifier.scopus-author-id14038006000
person.identifier.scopus-author-id56000120200
person.identifier.scopus-author-id24462032800
person.identifier.scopus-author-id7003560119
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