Test-based equivalent-material method for collapse qualification of helically wound and layered cylindrical structures - with application to flexible-riser carcass

Test-based equivalent-material method for collapse qualification of helically wound and layered cylindrical structures - with application to flexible-riser carcass | 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 Article Test-based equivalent-material method for collapse qualification of helically wound and layered cylindrical structures - with application to flexible-riser carcass Mohsen Saneian, Yuteng Zhang, Yong Bai, Pan Fang, Peng Cheng, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7774908/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted You are reading this latest preprint version Abstract Reliable qualification of collapse resistance is critical across pressurised cylindrical shells ranging from offshore risers and subsea cables to aerospace tanks and even biological ducts. Existing approaches either rely on costly hyperbaric chambers or oversimplified geometric surrogates that neglect the formation-induced residual stresses and imperfections. Here, we propose a back-inferred equivalent-material method (EMM), which transforms a simple benchtop flat-plate compression test into a nonlinear constitutive law that embeds cold work, residual stress, friction, and small-scale compliance implicitly. Embedding this equivalent law into a homogeneous finite-element model reproduces hydrostatic collapse without the need for full-scale testing. We demonstrate the method on flexible-pipe carcass layers and steel-strip reinforced thermoplastic pipes, showing close agreement with explicit-geometry simulations and hyperbaric measurements. More broadly, the geometry-agnostic formulation enables rapid, low-cost, and physically faithful qualification across diverse layered shells, offering a general route to replace hyperbaric testing in industries spanning energy, aerospace, and biomedical engineering. Physical sciences/Engineering/Civil engineering Physical sciences/Engineering/Mechanical engineering Full Text Additional Declarations There is NO Competing Interest. Supplementary Files SupplemantaryMaterial.pdf Theoretical Equations Cite Share Download PDF Status: Under Review 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-7774908","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":525153788,"identity":"fb913333-b54c-476c-8bbd-680c57960d9c","order_by":0,"name":"Mohsen Saneian","email":"data:image/png;base64,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","orcid":"https://orcid.org/0009-0008-1845-5560","institution":"Zhejiang University","correspondingAuthor":true,"prefix":"","firstName":"Mohsen","middleName":"","lastName":"Saneian","suffix":""},{"id":525153789,"identity":"a7f1a511-5ff6-43f3-a3de-4edfb172a6be","order_by":1,"name":"Yuteng Zhang","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Yuteng","middleName":"","lastName":"Zhang","suffix":""},{"id":525153790,"identity":"e768df3c-e43c-4758-8444-b30ebf13047f","order_by":2,"name":"Yong Bai","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Yong","middleName":"","lastName":"Bai","suffix":""},{"id":525153791,"identity":"a538e06e-7be1-4449-830c-d7aed57b60c5","order_by":3,"name":"Pan Fang","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Pan","middleName":"","lastName":"Fang","suffix":""},{"id":525153792,"identity":"9c15704e-bab3-4305-be2f-102d3b8c3a67","order_by":4,"name":"Peng Cheng","email":"","orcid":"","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Peng","middleName":"","lastName":"Cheng","suffix":""},{"id":525153793,"identity":"e53a34b5-7b6b-4438-bf4c-84aa99a4f715","order_by":5,"name":"Liang Zhao","email":"","orcid":"https://orcid.org/0000-0002-1568-990X","institution":"","correspondingAuthor":false,"prefix":"","firstName":"Liang","middleName":"","lastName":"Zhao","suffix":""}],"badges":[],"createdAt":"2025-10-03 16:05:59","currentVersionCode":1,"declarations":"","doi":"10.21203/rs.3.rs-7774908/v1","doiUrl":"https://doi.org/10.21203/rs.3.rs-7774908/v1","draftVersion":[],"editorialEvents":[],"editorialNote":"","failedWorkflow":false,"files":[{"id":92910866,"identity":"87203cd1-ef00-48b9-ae45-a5f2669b896f","added_by":"auto","created_at":"2025-10-07 03:32:56","extension":"pdf","order_by":0,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":32023159,"visible":true,"origin":"","legend":"","description":"","filename":"Manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-7774908/v1/c8211cd75e228898dbe9f89d.pdf"},{"id":92910863,"identity":"b1a84093-97cb-4ae4-9685-a100b4124228","added_by":"auto","created_at":"2025-10-07 03:32:55","extension":"json","order_by":1,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":6773,"visible":true,"origin":"","legend":"","description":"","filename":"COMMSENG250742.json","url":"https://assets-eu.researchsquare.com/files/rs-7774908/v1/d2a7731db794d8dcc33a640d.json"},{"id":92910864,"identity":"1123e4d1-c7d9-44dd-a977-50b4697f78b2","added_by":"auto","created_at":"2025-10-07 03:32:56","extension":"pdf","order_by":2,"title":"","display":"","copyAsset":false,"role":"acdc-reference","size":3519678,"visible":true,"origin":"","legend":"","description":"","filename":"SupplemantaryMaterial.pdf","url":"https://assets-eu.researchsquare.com/files/rs-7774908/v1/b190ce77f658d2fbce870d06.pdf"},{"id":92911171,"identity":"7f17ffb7-8a2a-48e6-ba94-fae39e400fea","added_by":"auto","created_at":"2025-10-07 03:41:03","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"manuscript-pdf","size":5269069,"visible":true,"origin":"","legend":"Article File","description":"","filename":"Manuscript.pdf","url":"https://assets-eu.researchsquare.com/files/rs-7774908/v1_covered_30c2eeee-79d8-4884-a415-715c40bff8de.pdf"},{"id":92910865,"identity":"cacd0c5e-00e2-4c72-b6e1-485be51dc0f5","added_by":"auto","created_at":"2025-10-07 03:32:56","extension":"pdf","order_by":1,"title":"","display":"","copyAsset":false,"role":"supplement","size":3519678,"visible":true,"origin":"","legend":"Theoretical Equations","description":"","filename":"SupplemantaryMaterial.pdf","url":"https://assets-eu.researchsquare.com/files/rs-7774908/v1/048169a501a3710b3cc1bd29.pdf"}],"financialInterests":"There is \u003cb\u003eNO\u003c/b\u003e Competing Interest.","formattedTitle":"\u003cp\u003eTest-based equivalent-material method for collapse qualification of helically wound and layered cylindrical structures - with application to flexible-riser carcass\u003c/p\u003e","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":false,"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":"nature-portfolio","isNatureJournal":true,"hasQc":false,"allowDirectSubmit":false,"externalIdentity":"","sideBox":"","snPcode":"","submissionUrl":"","title":"Nature Portfolio","twitterHandle":"","acdcEnabled":false,"dfaEnabled":false,"editorialSystem":"ejp","reportingPortfolio":"","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"","lastPublishedDoi":"10.21203/rs.3.rs-7774908/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7774908/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"Reliable qualification of collapse resistance is critical across pressurised cylindrical shells ranging from offshore risers and subsea cables to aerospace tanks and even biological ducts. Existing approaches either rely on costly hyperbaric chambers or oversimplified geometric surrogates that neglect the formation-induced residual stresses and imperfections. Here, we propose a back-inferred equivalent-material method (EMM), which transforms a simple benchtop flat-plate compression test into a nonlinear constitutive law that embeds cold work, residual stress, friction, and small-scale compliance implicitly. Embedding this equivalent law into a homogeneous finite-element model reproduces hydrostatic collapse without the need for full-scale testing. We demonstrate the method on flexible-pipe carcass layers and steel-strip reinforced thermoplastic pipes, showing close agreement with explicit-geometry simulations and hyperbaric measurements. More broadly, the geometry-agnostic formulation enables rapid, low-cost, and physically faithful qualification across diverse layered shells, offering a general route to replace hyperbaric testing in industries spanning energy, aerospace, and biomedical engineering.","manuscriptTitle":"Test-based equivalent-material method for collapse qualification of helically wound and layered cylindrical structures - with application to flexible-riser carcass","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-10-07 03:32:51","doi":"10.21203/rs.3.rs-7774908/v1","editorialEvents":[],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"communications-engineering","isNatureJournal":true,"hasQc":false,"allowDirectSubmit":false,"externalIdentity":"commseng","sideBox":"Learn more about [Communications Engineering](http://link.springer.com/journal/44172)","snPcode":"44172","submissionUrl":"https://mts-commseng.nature.com/cgi-bin/main.plex","title":"Communications Engineering","twitterHandle":"@commseng","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"ejp","reportingPortfolio":"Springer Hybrid","inReviewEnabled":true,"inReviewRevisionsEnabled":true}}],"origin":"","ownerIdentity":"bc9207d7-2570-4a17-ad2b-949f21b02363","owner":[],"postedDate":"October 7th, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"under-review","subjectAreas":[{"id":55867884,"name":"Physical sciences/Engineering/Civil engineering"},{"id":55867885,"name":"Physical sciences/Engineering/Mechanical engineering"}],"tags":[],"updatedAt":"2026-04-18T18:15:11+00:00","versionOfRecord":[],"versionCreatedAt":"2025-10-07 03:32:51","video":"","vorDoi":"","vorDoiUrl":"","workflowStages":[]},"version":"v1","identity":"rs-7774908","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7774908","identity":"rs-7774908","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}