Accuracy of digital image correlation system for compressive behaviour of wood

Accuracy of digital image correlation system for compressive behaviour of wood | 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 Accuracy of digital image correlation system for compressive behaviour of wood Masaki Teranishi, Doppo Matsubara This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4543474/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 31 Aug, 2024 Read the published version in Wood Science and Technology → Version 1 posted 12 You are reading this latest preprint version Abstract The digital image correlation (DIC) system is a powerful tool for measuring distributions of displacement and strain on the surface of a specimen. DIC systems are employed not only for homogeneous materials such as metals but also for heterogeneous materials such as wood. Although numerous validations of DIC system accuracy for metallic materials exist, accuracy verification for wood, especially under multiaxial stress conditions, is less common. This study investigated the accuracy of a DIC system equipped with a bilateral telecentric lens on wood (Douglas fir). The accuracy verification in uniaxial stress fields was conducted through full compression testing, while verification in multiaxial stress fields was performed through partial compression testing. Additionally, compression tests on A6063 (aluminium alloy) were conducted to examine the differences in DIC system accuracy between homogeneous and heterogeneous materials. The accuracy of the DIC system was assessed by comparing the results with those obtained from strain gauges. The results from the full compression tests indicate that the accuracy of axial strain measured by the DIC system was comparable for the specimens of A6063 and Douglas fir in the longitudinal (L) direction but was inferior for Douglas fir in the radial (R) direction. Furthermore, the differences in Young’s modulus obtained from the DIC system and strain gauge for the specimens of A6063, Douglas fir (L), and Douglas fir (R) were 2.3%, 2.4%, and 13.7%, respectively. In the partial compression tests, the accuracy of equivalent strain measured by the DIC system in the specimens of Douglas fir (R) was lower than that in A6063, attributable to a high strain gradient in the attachment region of the strain gauge. A novel variable was proposed using the standard deviation of strain to evaluate this strain gradient within the region. This variable demonstrated correspondence to the difference in equivalent strain obtained from the DIC system and the triaxial strain gauge, regardless of the material’s homogeneity or heterogeneity. Full and partial compression test Heterogeneous and orthotropic material Video extensometer Bilateral telecentric lens Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 31 Aug, 2024 Read the published version in Wood Science and Technology → Version 1 posted Editorial decision: Revision requested 15 Jul, 2024 Reviews received at journal 28 Jun, 2024 Reviews received at journal 23 Jun, 2024 Reviews received at journal 17 Jun, 2024 Reviewers agreed at journal 12 Jun, 2024 Reviewers agreed at journal 12 Jun, 2024 Reviewers agreed at journal 11 Jun, 2024 Reviewers agreed at journal 11 Jun, 2024 Reviewers invited by journal 11 Jun, 2024 Editor assigned by journal 09 Jun, 2024 Submission checks completed at journal 07 Jun, 2024 First submitted to journal 07 Jun, 2024 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. 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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-4543474","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":315474165,"identity":"ec85300d-0baf-48dc-9d22-79373c00564a","order_by":0,"name":"Masaki Teranishi","email":"data:image/png;base64,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","orcid":"","institution":"Niigata University","correspondingAuthor":true,"prefix":"","firstName":"Masaki","middleName":"","lastName":"Teranishi","suffix":""},{"id":315474166,"identity":"29940bbd-ddcb-4570-a667-992528cc1101","order_by":1,"name":"Doppo Matsubara","email":"","orcid":"","institution":"Tokyo University of Agriculture and Technology","correspondingAuthor":false,"prefix":"","firstName":"Doppo","middleName":"","lastName":"Matsubara","suffix":""}],"badges":[],"createdAt":"2024-06-07 04:53:15","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-4543474/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-4543474/v1","draftVersion":[],"editorialEvents":[{"content":"https://doi.org/10.1007/s00226-024-01597-4","type":"published","date":"2024-08-31T15:58:01+00:00"}],"editorialNote":"","failedWorkflow":false,"files":[{"id":63821111,"identity":"20dbc8f0-3ca8-4c48-9340-1fe0f18bd1b1","added_by":"auto","created_at":"2024-09-02 16:11:55","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":2793082,"visible":true,"origin":"","legend":"","description":"","filename":"20240607manuscriptR1.pdf","url":"https://assets-eu.researchsquare.com/files/rs-4543474/v1_covered_5dfb68fb-1318-4645-a293-53bf0ddf1811.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Accuracy of digital image correlation system for compressive behaviour of wood","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":false,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"wood-science-and-technology","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"wsat","sideBox":"Learn more about [Wood Science and Technology](http://link.springer.com/journal/226)","snPcode":"226","submissionUrl":"https://submission.nature.com/new-submission/226/3","title":"Wood Science and Technology","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"Full and partial compression test, Heterogeneous and orthotropic material, Video extensometer, Bilateral telecentric lens","lastPublishedDoi":"10.21203/rs.3.rs-4543474/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-4543474/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eThe digital image correlation (DIC) system is a powerful tool for measuring distributions of displacement and strain on the surface of a specimen. DIC systems are employed not only for homogeneous materials such as metals but also for heterogeneous materials such as wood. Although numerous validations of DIC system accuracy for metallic materials exist, accuracy verification for wood, especially under multiaxial stress conditions, is less common. This study investigated the accuracy of a DIC system equipped with a bilateral telecentric lens on wood (Douglas fir). The accuracy verification in uniaxial stress fields was conducted through full compression testing, while verification in multiaxial stress fields was performed through partial compression testing. Additionally, compression tests on A6063 (aluminium alloy) were conducted to examine the differences in DIC system accuracy between homogeneous and heterogeneous materials. The accuracy of the DIC system was assessed by comparing the results with those obtained from strain gauges. The results from the full compression tests indicate that the accuracy of axial strain measured by the DIC system was comparable for the specimens of A6063 and Douglas fir in the longitudinal (L) direction but was inferior for Douglas fir in the radial (R) direction. Furthermore, the differences in Young\u0026rsquo;s modulus obtained from the DIC system and strain gauge for the specimens of A6063, Douglas fir (L), and Douglas fir (R) were 2.3%, 2.4%, and 13.7%, respectively. In the partial compression tests, the accuracy of equivalent strain measured by the DIC system in the specimens of Douglas fir (R) was lower than that in A6063, attributable to a high strain gradient in the attachment region of the strain gauge. A novel variable was proposed using the standard deviation of strain to evaluate this strain gradient within the region. 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