Experimental and Numerical Response in SLS-Manufactured Polyamide-12 Octet-Truss Lattice under Tension and Compression

Experimental and Numerical Response in SLS-Manufactured Polyamide-12 Octet-Truss Lattice under Tension and Compression | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Experimental and Numerical Response in SLS-Manufactured Polyamide-12 Octet-Truss Lattice under Tension and Compression Soheil Gholibeygi, Bahar Ayhan, Hale Ergün This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-9566294/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Additively manufactured lattice structures, particularly stretch-dominated topologies such as the octet-truss, offer exceptional stiffness-to-weight ratios. However, significant discrepancies often arise between numerical predictions based on as-designed geometries and corresponding experimental responses. This study presents a comprehensive mechanical characterization of octet-truss lattice structure made of Selective Laser Sintering fabricated Polyamid-12 under both tensile and compressive loadings. Two different plasticity material models are considered for the calibration of the material models in FEM simulations. Material plastic data for Von Mises model and parameters for Drucker-Prager model are presented. Optic and Environmental Scanning Electronic Microscope images of the fractured surfaces of the specimens are presented. Morphology of the fractured surfaces revealed whitened regions with fibrillation indicating ductile failure and darker regions with intra/interlayer failure modes and spherulites indicating brittle failure. Drucker-Prager plastic hardening model with nominal strut diameter exhibited a good approximation of the compressive lattice specimens and captured the experimental elastic, plastic and densification regions, especially for the specimen with a layer-by-layer failure. The overestimated numerical result of the tensile lattice specimen is attributed to the manufacturing error, unsintered layer and the porosity, and modified by the effective diameter of the struts. The study establishes a quantitative link between manufacturing-induced variability and mechanical behavior, providing a predictive framework for more reliable design of high-performance lattice metamaterials. Octet-truss lattice mechanical testing finite element analysis Drucker-Prager Polyamid-12 Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. Our growing team is made up of researchers and industry professionals working together to solve the most critical problems facing scientific publishing. Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-9566294","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":640809811,"identity":"45b8460e-42ca-4c3f-a812-5cc2fb7e2174","order_by":0,"name":"Soheil Gholibeygi","email":"","orcid":"","institution":"Istanbul Technical University","correspondingAuthor":false,"prefix":"","firstName":"Soheil","middleName":"","lastName":"Gholibeygi","suffix":""},{"id":640809819,"identity":"4242dfba-e445-4ca5-9cf7-03465a70bbc1","order_by":1,"name":"Bahar Ayhan","email":"","orcid":"","institution":"Istanbul Technical University","correspondingAuthor":false,"prefix":"","firstName":"Bahar","middleName":"","lastName":"Ayhan","suffix":""},{"id":640809822,"identity":"b06d9827-eb45-4b4a-ad90-294b7cfc15e2","order_by":2,"name":"Hale Ergün","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAvUlEQVRIiWNgGAWjYLACxgYbHjCDhwQtaTw8UC0SxGo5zEC8Fn7p49ekC3ecl7GXSGB88LaNoc68gYAWyb6cMumZZ27z8EgkMBvObWOQkDlAQIvBGZ40ad42sBY2IINBgqDL7CFazoG0sP8mSosBD/sxoJYDYFuYidIicYaH2Zq3LZmH58zDZsk55yQkZxDSwt/D/vA2b5udPXt78sEPb8ps+ImIGB4DKIOxgYHImGR/QIyqUTAKRsEoGMkAAOsaMDdeBAH0AAAAAElFTkSuQmCC","orcid":"","institution":"Istanbul Technical University","correspondingAuthor":true,"prefix":"","firstName":"Hale","middleName":"","lastName":"Ergün","suffix":""}],"badges":[],"createdAt":"2026-04-29 13:09:36","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-9566294/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-9566294/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":109760288,"identity":"7d41d610-c140-444d-8611-3106dfb2a571","added_by":"auto","created_at":"2026-05-22 07:28:26","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":7290170,"visible":true,"origin":"","legend":"","description":"","filename":"PAMAnonymousApril292026.pdf","url":"https://assets-eu.researchsquare.com/files/rs-9566294/v1_covered_6af453bc-a458-4ecd-85b7-914aa1690663.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Experimental and Numerical Response in SLS-Manufactured Polyamide-12 Octet-Truss Lattice under Tension and Compression","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":true,"highlight":"","institution":"","isAcceptedByJournal":false,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"researchsquare","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":true,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"/submission","title":"Research Square","twitterHandle":"researchsquare","acdcEnabled":true,"dfaEnabled":false,"editorialSystem":"","reportingPortfolio":"","inReviewEnabled":false,"inReviewRevisionsEnabled":true},"keywords":"Octet-truss lattice, mechanical testing, finite element analysis, Drucker-Prager, Polyamid-12","lastPublishedDoi":"10.21203/rs.3.rs-9566294/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-9566294/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"Additively manufactured lattice structures, particularly stretch-dominated topologies such as the octet-truss, offer exceptional stiffness-to-weight ratios. 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Drucker-Prager plastic hardening model with nominal strut diameter exhibited a good approximation of the compressive lattice specimens and captured the experimental elastic, plastic and densification regions, especially for the specimen with a layer-by-layer failure. The overestimated numerical result of the tensile lattice specimen is attributed to the manufacturing error, unsintered layer and the porosity, and modified by the effective diameter of the struts. 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