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dc.contributor.authorSeiler, Philipp Emanuelen
dc.contributor.authorTankasala, Harikaen
dc.contributor.authorFleck, Normanen
dc.date.accessioned2019-05-03T23:30:25Z
dc.date.available2019-05-03T23:30:25Z
dc.date.issued2019-06-01en
dc.identifier.issn1359-6454
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/292324
dc.description.abstractRapid prototyping is an emerging technology for the fast make of engineering components. A common technique is to laser cut a two-dimensional (2D) part from polymethyl methacrylate (PMMA) sheet. However, both manufacturing defects and design defects (such as stress raisers) exist in the part, and these degrade its strength. In the present study, a combination of experiment and finite element analysis is used to determine the sensitivity of the tensile strength of PMMA hexagonal lattices to both as-manufactured and as-designed defects. The as-manufactured defects include variations in strut thickness and in Plateau border radius. The knockdown in lattice tensile strength is measured for lattice relative density in the range of 0.07 to 0.19. A systematic finite element (FE) study is performed to assess the explicit role of each type of as-manufactured defect on the lattice strength. As-designed defects such as randomly perturbed joints, missing cells, and solid inclusions are introduced within a regular hexagonal lattice. The notion of a transition flaw size is used to quantify the sensitivity of lattice strength to defect size.
dc.description.sponsorshipThe authors gratefully acknowledge the financial support from the European Research Council under the European Union's Horizon 2020 research and innovation program, grant GA669764, MULTILAT.
dc.languageenen
dc.publisherElsevier BV
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.titleThe role of defects in dictating the strength of brittle honeycombs made by rapid prototypingen
dc.typeArticle
prism.endingPage200
prism.publicationDate2019en
prism.publicationNameActa Materialiaen
prism.startingPage190
prism.volume171en
dc.identifier.doi10.17863/CAM.39475
dcterms.dateAccepted2019-03-30en
rioxxterms.versionofrecord10.1016/j.actamat.2019.03.036en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2019-06-01en
dc.contributor.orcidTankasala, Harika [0000-0002-9892-154X]
dc.contributor.orcidFleck, Norman [0000-0003-0224-1804]
dc.identifier.eissn1873-2453
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) ERC (206409)
cam.issuedOnline2019-04-04en
cam.orpheus.successThu Jan 30 10:46:57 GMT 2020 - Embargo updated*
rioxxterms.freetoread.startdate2020-04-04


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Attribution-NonCommercial-NoDerivatives 4.0 International
Except where otherwise noted, this item's licence is described as Attribution-NonCommercial-NoDerivatives 4.0 International