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Effect of Poisson's ratio on the mechanical properties and behaviour of auxetic bolts withdrawal from holes in beech wood

cris.lastimport.scopus2025-10-23T07:00:51Z
cris.virtual.author-orcid0000-0001-9101-0981
cris.virtual.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
cris.virtualsource.author-orcid53d035ee-778d-4fef-b6c1-b736047873f2
cris.virtualsource.author-orcid#PLACEHOLDER_PARENT_METADATA_VALUE#
dc.abstract.enThe work involves utilising new auxetic connectors for wooden structures, which will enhance their efficiency and competitiveness compared to conventional connectors. Due to the unique properties of materials and structures with a negative Poisson's ratio, called auxetics, it was decided to provide scientific evidence for the engineering application of auxetic bolts to timber connections that can improve reaction to axial loads that can cause the fastener to withdraw from the timber or reduce its stiffness. The study aimed to check the effect of Poisson's ratio on the withdrawal force of auxetic bolts from holes in wood (using beech wood as an example) and the distribution of radial pressures in the joint, depending on the angle of the wood fibres. It was also decided to determine the effect of Poisson's ratio on the change in absorption energy during bolt withdrawal. Experimental studies were conducted on steel auxetic bolt models produced using 3D printing. Numerical calculations included the determination of radial pressures during bolt withdrawal. Based on the results, it was demonstrated that negative Poisson's ratio values lead to an increase of up to 42.9 % in the bolt withdrawal force in the tensile stress state compared to conventional bolts. The amount of energy absorbed also increases. In the case of auxetic bolts, the voids deform, pressing with their sharp edges against the wood surfaces and generating more friction and higher radial pressures.
dc.affiliationWydział Leśny i Technologii Drewna
dc.affiliation.instituteKatedra Meblarstwa
dc.contributor.authorSmardzewski, Jerzy
dc.contributor.authorWojciechowski, Krzysztof W.
dc.date.access2025-10-09
dc.date.accessioned2025-10-09T08:12:08Z
dc.date.available2025-10-09T08:12:08Z
dc.date.copyright2025-08-16
dc.date.issued2025
dc.description.accesstimeat_publication
dc.description.bibliographyil., bibliogr.
dc.description.financepublication_nocost
dc.description.financecost0,00
dc.description.if6,4
dc.description.number15 November 2025
dc.description.points140
dc.description.versionfinal_published
dc.description.volume343, Part C
dc.identifier.doi10.1016/j.engstruct.2025.121166
dc.identifier.eissn1873-7323
dc.identifier.issn0141-0296
dc.identifier.urihttps://sciencerep.up.poznan.pl/handle/item/5321
dc.identifier.weblinkhttps://www.sciencedirect.com/science/article/pii/S0141029625015573?via%3Dihub
dc.languageen
dc.relation.ispartofEngineering Structures
dc.relation.pagesart. 121166
dc.rightsCC-BY
dc.sciencecloudnosend
dc.share.typeOTHER
dc.subject.enauxetics
dc.subject.entimber bolts
dc.subject.enwood
dc.subject.enwithdrawal
dc.subject.enradial pressure
dc.titleEffect of Poisson's ratio on the mechanical properties and behaviour of auxetic bolts withdrawal from holes in beech wood
dc.typeJournalArticle
dspace.entity.typePublication
oaire.citation.volume343