Influence of density of a polyurethane microcellular elastomer foam on its compressive energy absorption and time-dependent behavior

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dc.contributor.authorCortazar Noguerol, Julen
dc.contributor.authorCortés Martínez, Fernando
dc.contributor.authorElejabarrieta Olabarri, María Jesús
dc.date.accessioned2025-02-14T09:14:44Z
dc.date.available2025-02-14T09:14:44Z
dc.date.issued2025-01
dc.date.updated2025-02-14T09:14:44Z
dc.description.abstractThis study comprehensively examines the influence of density on the energy absorption capacity and the time-dependent behavior of polyurethane microcellular elastomers (PUMEs) under compression. On the one hand, to evaluate the energy absorption capacity, stress-strain curves, which can be modelled as a bilinear elastic behavior, are obtained for three different densities at two different loading rates. The data show that higher-density PUMEs exhibit greater stiffness, which is also dependent on the loading rate. Additionally, the lowest density material demonstrates the highest energy absorption efficiency at lower peak stresses and increasing the loading rate reduces efficiency across all tested densities. On the other hand, the time dependent properties are characterized through the relaxation modulus of each of the densities. To obtain it, creep experimental data is gathered and converted to relaxation through the convolution relationship between these two properties by means of Maxwell and Kelvin generalized models. The results indicate increased stiffness and longer relaxation times for higher-density PUMEs, suggesting slower responses and lower deformations under the same load. In conclusion, the increased stiffness and reduced creep compliance make higher-density PUMEs suitable for high load-bearing applications, while lower-density PUMEs are better suited for high energy absorption at lower stresses.en
dc.description.sponsorshipThis study received financial support from Orona EIC S. Coop., from the Department of Education for the Research Group program IT1507–22 and Department of Economic Development, Sustainability and Environment project KK-2022/00050 of Basque Governmenten
dc.identifier.citationCortazar-Noguerol, J., Cortés, F., & Elejabarrieta, M. J. (2025). Influence of density of a polyurethane microcellular elastomer foam on its compressive energy absorption and time-dependent behavior. Journal of Materials Research and Technology, 34, 439-448. https://doi.org/10.1016/J.JMRT.2024.12.065
dc.identifier.doi10.1016/J.JMRT.2024.12.065
dc.identifier.eissn2214-0697
dc.identifier.issn2238-7854
dc.identifier.urihttps://hdl.handle.net/20.500.14454/2307
dc.language.isoeng
dc.publisherElsevier Editora Ltda
dc.rights© 2024 The Authors
dc.subject.otherCreep behavior
dc.subject.otherDensity influence
dc.subject.otherEnergy absorption efficiency
dc.subject.otherMechanical characterization
dc.subject.otherPolyurethane microcellular Elastomer (PUME)
dc.subject.otherViscoelastic properties
dc.titleInfluence of density of a polyurethane microcellular elastomer foam on its compressive energy absorption and time-dependent behavioren
dc.typejournal article
dcterms.accessRightsopen access
oaire.citation.endPage448
oaire.citation.startPage439
oaire.citation.titleJournal of Materials Research and Technology
oaire.citation.volume34
oaire.licenseConditionhttps://creativecommons.org/licenses/by-nc-nd/4.0/
oaire.versionVoR
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