Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/82116
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dc.contributorDepartment of Biomedical Engineering-
dc.creatorYao, Yen_US
dc.creatorWang, Len_US
dc.creatorLi, Jen_US
dc.creatorTian, Sen_US
dc.creatorZhang, Men_US
dc.creatorFan, Yen_US
dc.date.accessioned2020-05-05T05:58:43Z-
dc.date.available2020-05-05T05:58:43Z-
dc.identifier.issn0264-1275en_US
dc.identifier.urihttp://hdl.handle.net/10397/82116-
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.rights© 2019 BeiHang University School of Biological Science and Medical Engineering. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)en_US
dc.rightsThe following publication Yao, Y., Wang, L., Li, J., Tian, S., Zhang, M., & Fan, Y. (2020). A novel auxetic structure based bone screw design: Tensile mechanical characterization and pullout fixation strength evaluation. Materials & Design, 188, 108424, is available at https://doi.org/10.1016/j.matdes.2019.108424en_US
dc.subject3D printingen_US
dc.subjectAuxetic structureen_US
dc.subjectBone screwen_US
dc.subjectMechanical propertiesen_US
dc.subjectPullout forceen_US
dc.titleA novel auxetic structure based bone screw design : tensile mechanical characterization and pullout fixation strength evaluationen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.volume188en_US
dc.identifier.doi10.1016/j.matdes.2019.108424en_US
dcterms.abstractIt was supposed that auxetic structure with negative Poisson's ratio (NPR) expands under stretch and could enhance the screw-bone fixation. In this study, the novel auxetic structure based bone screws were designed, and mechanical properties and fixation strength were evaluated. Auxetic unit cells (A1–A6) were introduced into the design of screw bodies after a mechanical evaluation. Tubular auxetic structures (TA1–TA6), auxetic screws (AS1–AS6) and one non-auxetic screw (NS) were manufactured using 3D-printing. The fabrication process well reproduced the original designs despite the some mismatch in the macro and micro morphologies. Tensile tests on specimens were conducted experimentally and computationally. The relationship between NPR and fixation strength of the screws was investigated by computationally bone-pullout test. Among all screw designs, AS2 generated the largest stiffness and strength, and better NPR, AS5 produced the highest NPR, and smallest stiffness and strength. Maximal pullout force within low-, mid- and high-density bone was shown in AS5 (399.39 N), AS6 (561.07 N) and AS2 (1185.93 N) respectively. It was concluded that varying auxetic structures altered the screw's mechanical properties especially its functional properties. The bone-screw fixation could be improved by auxetic structures while other design factors should also be taken in account.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationMaterials and design, 2020, v. 188, 108424en_US
dcterms.isPartOfMaterials and designen_US
dcterms.issued2020-
dc.identifier.isiWOS:000514567900009-
dc.identifier.scopus2-s2.0-85078736981-
dc.identifier.eissn1873-4197en_US
dc.identifier.artn108424en_US
dc.description.validate202006 bcma-
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumberOA_Scopus/WOSen_US
dc.description.pubStatusPublisheden_US
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