Influence of the sample shape factor on the dynamic characterization of viscoelastic properties: complex moduli and Poisson's ratio

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dc.contributor.authorCortazar Noguerol, Julen
dc.contributor.authorCortés Martínez, Fernando
dc.contributor.authorElejabarrieta Olabarri, María Jesús
dc.date.accessioned2026-01-12T10:40:36Z
dc.date.available2026-01-12T10:40:36Z
dc.date.issued2026
dc.date.updated2026-01-12T10:40:36Z
dc.description.abstractThis study investigates how the sample shape factor influences the dynamic properties characterization of a silicone rubber within the linear viscoelastic regime. The effective elastic properties of elastomers are known to depend on geometry, but the effect of shape factor on the dynamic response has not been systematically characterized. To address this, cylindrical samples with varying geometries are tested under dynamic compression and torsion. The results reveal that both the complex compressive and shear moduli are affected by shape factor, and that this influence varies with frequency. To quantify the influence of shape factor and extract the material's dynamic properties, a phenomenological correction model is formulated. The model introduces frequency-dependent parameters that account for the geometric effects on the effective moduli. These corrected moduli yield a complex Poisson's ratio that exhibits a slight frequency dependence, with a decreasing real part and an increasing loss factor. This approach enables both the quantification of geometry-induced effects in dynamic mechanical testing and the extraction of intrinsic material's viscoelastic properties.en
dc.description.sponsorshipThis research has been supported by the University of Deusto Research Training Grants Program (grant reference number FPI UD_2023_07) and the Department of Education for the Research Group program IT1507-22.en
dc.identifier.citationCortazar-Noguerol, J., Cortés, F., & Elejabarrieta, M. J. (2026). Influence of the sample shape factor on the dynamic characterization of viscoelastic properties: complex moduli and Poisson’s ratio. European Journal of Mechanics, A/Solids, 117. https://doi.org/10.1016/J.EUROMECHSOL.2025.105963
dc.identifier.doi10.1016/J.EUROMECHSOL.2025.105963
dc.identifier.issn0997-7538
dc.identifier.urihttps://hdl.handle.net/20.500.14454/4679
dc.language.isoeng
dc.publisherElsevier Ltd
dc.rights© 2025 The Authors
dc.subject.otherComplex compressive modulus
dc.subject.otherComplex Poisson's ratio
dc.subject.otherComplex shear modulus
dc.subject.otherCompression test
dc.subject.otherShape factor
dc.subject.otherSilicone rubber
dc.subject.otherTorsion test
dc.titleInfluence of the sample shape factor on the dynamic characterization of viscoelastic properties: complex moduli and Poisson's ratioen
dc.typejournal article
dcterms.accessRightsopen access
oaire.citation.titleEuropean Journal of Mechanics, A/Solids
oaire.citation.volume117
oaire.licenseConditionhttps://creativecommons.org/licenses/by-nc/4.0/
oaire.versionVoR
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