Dislocation cell-based continuum crystal plasticity model for the size effect and strain jump plasticity deformation behavior of single crystal micropillar

Dislocation cell-based continuum crystal plasticity model for the size effect and strain jump plasticity deformation behavior of single crystal micropillar | 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 Dislocation cell-based continuum crystal plasticity model for the size effect and strain jump plasticity deformation behavior of single crystal micropillar Huili Guo, Xin Deng, Fulin Shang This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8118768/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 Experiments have found that the size effect and strain jump during plastic deformation is dependent on the dislocation cells inside. Despite this, continuum crystal plasticity model of micropillar is built with weak connections to dislocation cells mechanisms. This work proposes a new continuum crystal plasticity model by considering the evolution of average size of dislocation cell walls and cell interiors. Additionally, to detect strain jump, second-order work criterion is introduced by considering the evolution of dislocation cell substructure. The proposed approach is implemented in finite element simulations of Ni micropillar specimens (diameter range: 5-20μm). The simulation results demonstrate that the new model successfully captures both the size effect and strain jump phenomena, showing close alignment with experimental measurements. These specific plastic deformation behaviors, particularly the size effect and strain jump stem from variations in both the diameter of micropillars and the mean size of dislocation cell substructure. Moreover, the dislocation cell structure becomes more refined as plastic deformation intensifies. Crystal plasticity Dislocation cell Strain jump Second-order work Finite element simulation Micropillar 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-8118768","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":564228996,"identity":"4156c3a9-0c11-424a-abcb-d087735f2c8b","order_by":0,"name":"Huili Guo","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA2klEQVRIiWNgGAWjYHACNgYGAwseNvbGhgMfDGzsiNUiwcPPc7jx4IyCtGQitTBIMEjOSG8+zPPhEGMDIfXyEcnHHvMUSMgYHEhsOGxjcICZgf3w0Q34tBjeSEs35gE6zODAwYbDOQZ3+Bh40tJu4NUyI8dMGqzlYCNIyzNmBgkeMyK1HGZsOGwBIglpkZeAapFsA2phIEaLAc+zNMk54EBmbDjYY5CWzEbIL/Ltycck3vyxsWeTf/74w48/Nnb87IeP4bflALoIGz7lYFsaCKkYBaNgFIyCUQAAOmFHp3UNZ6wAAAAASUVORK5CYII=","orcid":"","institution":"Lanzhou Jiaotong University","correspondingAuthor":true,"prefix":"","firstName":"Huili","middleName":"","lastName":"Guo","suffix":""},{"id":564228997,"identity":"0f875861-7d83-4181-a3ff-f4023d9ecec2","order_by":1,"name":"Xin Deng","email":"","orcid":"","institution":"Lanzhou Jiaotong University","correspondingAuthor":false,"prefix":"","firstName":"Xin","middleName":"","lastName":"Deng","suffix":""},{"id":564228998,"identity":"3dae71c0-fe4b-4aae-be0e-715f78d8d9fb","order_by":2,"name":"Fulin Shang","email":"","orcid":"","institution":"Xi’an Jiaotong University","correspondingAuthor":false,"prefix":"","firstName":"Fulin","middleName":"","lastName":"Shang","suffix":""}],"badges":[],"createdAt":"2025-11-15 01:53:13","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-8118768/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-8118768/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":99310732,"identity":"11a90a16-eb6f-4b76-a2a5-713ea806192b","added_by":"auto","created_at":"2025-12-31 16:13:16","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":1008466,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-8118768/v1_covered_74e4e1ad-848f-42ce-be33-3b8845345d20.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Dislocation cell-based continuum crystal plasticity model for the size effect and strain jump plasticity deformation behavior of single crystal micropillar","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":"Crystal plasticity, Dislocation cell, Strain jump, Second-order work, Finite element simulation, Micropillar","lastPublishedDoi":"10.21203/rs.3.rs-8118768/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-8118768/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"Experiments have found that the size effect and strain jump during plastic deformation is dependent on the dislocation cells inside. 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