Experimental and Simulation Study on Low-Velocity Impact Induced Delamination Damage in CFRP T-shaped Stringer Stiffened Panel

Experimental and Simulation Study on Low-Velocity Impact Induced Delamination Damage in CFRP T-shaped Stringer Stiffened Panel | 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 Experimental and Simulation Study on Low-Velocity Impact Induced Delamination Damage in CFRP T-shaped Stringer Stiffened Panel Pan Li, Yuhuan Yuan, Wei Xi, Yangsheng Gao, Debin Song, Jia Huang, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7583091/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 This study systematically investigates the low-velocity impact damage behavior of carbon fiber reinforced polymer stiffened panels through experimental and numerical simulation approaches. Within the 35 J impact energy, two material configurations - Configuration I (China Composites Corporation) and Configuration II (Toray Industries, Japan) - exhibit markedly distinct failure modes: the former demonstrates baseplate delamination with intact stiffeners, while the latter shows stiffener damage accompanied by extensive delamination. The damage progression was successfully captured through finite element analysis employing a cohesive zone model, with its accuracy validated against experimental data. Through comparative analysis of experimental and simulation data, this study reveals that delamination in CFRP stiffened panels under low-velocity impact is primarily governed by interfacial tangential strength. Enhancement of tangential strength can reduce delamination area, while variations in normal strength demonstrate negligible effects. Physical sciences/Engineering Physical sciences/Materials science CFRP stiffened panels、Low-velocity impact、Cohesive zone model、Experimental-numerical correlation Full Text Additional Declarations No competing interests reported. Supplementary Files file.docx 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-7583091","acceptedTermsAndConditions":true,"allowDirectSubmit":true,"archivedVersions":[],"articleType":"Article","associatedPublications":[],"authors":[{"id":518112991,"identity":"21191020-f005-4fce-b19f-464787972178","order_by":0,"name":"Pan Li","email":"","orcid":"","institution":"Northwestern Polytechnical University","correspondingAuthor":false,"prefix":"","firstName":"Pan","middleName":"","lastName":"Li","suffix":""},{"id":518112992,"identity":"c87240c3-c8f5-4042-8812-e3848d792504","order_by":1,"name":"Yuhuan Yuan","email":"","orcid":"","institution":"COMAC Shanghai Aircraft Manufacturing Co. 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Within the 35 J impact energy, two material configurations - Configuration I (China Composites Corporation) and Configuration II (Toray Industries, Japan) - exhibit markedly distinct failure modes: the former demonstrates baseplate delamination with intact stiffeners, while the latter shows stiffener damage accompanied by extensive delamination. The damage progression was successfully captured through finite element analysis employing a cohesive zone model, with its accuracy validated against experimental data. Through comparative analysis of experimental and simulation data, this study reveals that delamination in CFRP stiffened panels under low-velocity impact is primarily governed by interfacial tangential strength. 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