Buckling analysis of asymmetric composite laminates with extension-twist multi-couplings

Buckling analysis of asymmetric composite laminates with extension-twist multi-couplings | 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 Buckling analysis of asymmetric composite laminates with extension-twist multi-couplings Da Cui, Muyao Miao, Daokui Li This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-6806081/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 Compared to conventional extension-twist coupled laminates, multi-coupled laminates with combined extension-twist interactions demonstrate superior mechanical performance, particularly in enhanced coupling characteristics and improved buckling resistance. A novel buckling analysis model for asymmetric composite extension-twist and bend-twist multi-coupled laminates is presented by this study. We successfully derive theoretical solutions for determining the critical buckling load of these multi-coupled asymmetric laminates through the synergistic integration of analytical derivation and deep learning algorithms. Our approach enables theoretically-guided optimization of asymmetric laminates with explicit consideration of buckling performance. Comparative analysis reveals remarkable consistency (within 3% deviation) between analytical predictions and numerical simulations of critical buckling loads. Significantly, the multi-coupled laminates exhibit simultaneous enhancement of both extension-twist coupling effects and critical buckling loads - achieving approximately 30% and 10% improvement for 7-layer and 8-layer configurations, respectively. Comprehensive robustness analysis validates the precision of layup techniques, while coupled numerical simulations and experimental buckling tests conclusively demonstrate the laminates' hygrothermal stability, coupling efficiency, and buckling load accuracy. The proposed methodology offers generalizability for buckling analysis of various multi-coupled asymmetric laminates. asymmetric composite materials hygro-thermal stability buckling analysis layup optimization 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. 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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-6806081","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":474759242,"identity":"4a01ddda-bb98-4b98-9785-8ab0890c8dd3","order_by":0,"name":"Da Cui","email":"","orcid":"","institution":"National University of Defense Technology","correspondingAuthor":false,"prefix":"","firstName":"Da","middleName":"","lastName":"Cui","suffix":""},{"id":474759243,"identity":"e787463a-78a9-46cd-93f9-9b5b8e352686","order_by":1,"name":"Muyao Miao","email":"","orcid":"","institution":"National University of Defense Technology","correspondingAuthor":false,"prefix":"","firstName":"Muyao","middleName":"","lastName":"Miao","suffix":""},{"id":474759244,"identity":"59ce15ab-bc4e-42d1-a344-28b4f9e36239","order_by":2,"name":"Daokui Li","email":"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAZAAAAAyAQMAAABI0h/eAAAABlBMVEX///8AAABVwtN+AAAACXBIWXMAAA7EAAAOxAGVKw4bAAAA10lEQVRIiWNgGAWjYBACPmYGAwaGAww8/ECOBBAzNhDSwgbTIglUKnGAKC0MEC0MBgeI1sLOvPHDhzOHZYxv9xje/sBgI7vhAPOzB/gdxlYsOePGYR6zO2eMLQ4wpBlvOMBmboBfC4+BNM8HoJYbOWZAhx1O3HCAh02CgBbj3yAtxjPAWv4TpcVMmgfoMAMJsJYDxGhhK7OccSadR+JGWrHFGYNk45mH2czwauHnP7z5xodj1vb8M5I33qiosJPtO978DK8WNAAKKmYS1I+CUTAKRsEowA4A9CZFaHb3gkIAAAAASUVORK5CYII=","orcid":"","institution":"National University of Defense Technology","correspondingAuthor":true,"prefix":"","firstName":"Daokui","middleName":"","lastName":"Li","suffix":""}],"badges":[],"createdAt":"2025-06-03 02:23:16","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-6806081/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-6806081/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":95228952,"identity":"71836567-cd1c-4289-81b6-8ca6c578480c","added_by":"auto","created_at":"2025-11-05 16:34:18","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":677540,"visible":true,"origin":"","legend":"","description":"","filename":"Researchpaper.pdf","url":"https://assets-eu.researchsquare.com/files/rs-6806081/v1_covered_7873e226-9c13-490a-8d17-5f57f1c65032.pdf"}],"financialInterests":"No competing interests reported.","formattedTitle":"Buckling analysis of asymmetric composite laminates with extension-twist multi-couplings","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":"asymmetric composite materials, hygro-thermal stability, buckling analysis, layup optimization","lastPublishedDoi":"10.21203/rs.3.rs-6806081/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-6806081/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eCompared to conventional extension-twist coupled laminates, multi-coupled laminates with combined extension-twist interactions demonstrate superior mechanical performance, particularly in enhanced coupling characteristics and improved buckling resistance. 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