Soft polymers dynamic characterisation using sandwich theory

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dc.contributor.authorCortés Martínez, Fernando
dc.contributor.authorBrun Martínez, Mikel
dc.contributor.authorGarcía Barruetabeña, Jon
dc.contributor.authorSarría, Imanol
dc.contributor.authorElejabarrieta Olabarri, María Jesús
dc.date.accessioned2024-11-12T16:08:03Z
dc.date.available2024-11-12T16:08:03Z
dc.date.issued2024-01
dc.date.updated2024-11-12T16:08:03Z
dc.description.abstractThis paper presents a method to identify the dynamic mechanical properties of soft not self-supporting viscoelastic materials at high frequencies using sandwich beams. The motivation of this alternative method comes from the fact that the method of Ross, Kerwin and Ungar (RKU), proposed by the standard ASTM E 756-05, adds structural rigidity to the sandwich as shear increases, for example at high frequencies, and consequently, the stiffness of the core material is underestimated. The proposed method is based on a homogenization technique for sandwich beams that takes into account quadratic shear stress in the formulation, instead of a constant shear as the RKU method. To prove its worth, the properties of a soft polymer are identified by both methods from experimental transmissibility measures carried out on a sandwich beam up to 2500 Hz. Then, finite element simulations are performed using the obtained material properties to compare the numerical transmissibility functions with the experimental one. A numerical comparison for the case of a sandwich beam with a thicker viscoelastic core is also completed, proving the improvement in the stiffness and damping properties identification in the high frequency range by considering quadratic shear in the formulation. As a result, the identified mechanical properties by the proposed method are more accurate at high frequencies and for thicker core beams, i.e., when the shear effect is significant.en
dc.description.sponsorshipThis study received financial support from the Basque Government through the Research Group program IT1507–22, from the CONVICA (KK-2022/00050) and PREVICOM (KK-2022/00029) projectsen
dc.identifier.citationCortés, F., Brun, M., García-Barruetabeña, J., Sarría, I., & Elejabarrieta, M. J. (2024). Soft polymers dynamic characterisation using sandwich theory. Journal of Sandwich Structures and Materials, 26(1), 3-24. https://doi.org/10.1177/10996362231197677
dc.identifier.doi10.1177/10996362231197677
dc.identifier.eissn1530-7972
dc.identifier.issn1099-6362
dc.identifier.urihttp://hdl.handle.net/20.500.14454/1794
dc.language.isoeng
dc.publisherSAGE Publications Ltd
dc.rights© The Author(s) 2023
dc.subject.otherDynamic characterisation
dc.subject.otherHigh frequencies
dc.subject.otherMechanical properties identification
dc.subject.otherRoss, Kerwin and Ungar
dc.subject.otherSandwich beams
dc.subject.otherSoft polymers
dc.subject.otherThick core
dc.titleSoft polymers dynamic characterisation using sandwich theoryen
dc.typejournal article
dcterms.accessRightsmetadata only access
oaire.citation.endPage24
oaire.citation.issue1
oaire.citation.startPage3
oaire.citation.titleJournal of Sandwich Structures and Materials
oaire.citation.volume26
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