Coupled Thermally Activated Fracture Kinetics and Damage Evolution in Steel Fiber-Reinforced Concrete (SFRC) under Dynamic Response

Coupled Thermally Activated Fracture Kinetics and Damage Evolution in Steel Fiber-Reinforced Concrete (SFRC) under Dynamic Response | 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 Coupled Thermally Activated Fracture Kinetics and Damage Evolution in Steel Fiber-Reinforced Concrete (SFRC) under Dynamic Response Mohsin Ali, Li Chen, Bin Feng, Maher Ali Rusho, Wakeel Hussain This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7964216/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 introduces a novel thermofluctuation-based constitutive model for predicting the dynamic compressive behavior of Steel Fiber-Reinforced Concrete (SFRC) under high strain rate loading, with relevance to extreme structural applications. The model incorporates a unique combination of rate-dependent damage mechanics and atomic-scale thermal fluctuation theory to accurately capture the fracture mechanisms in SFRC, which are influenced by both time and temperature. Experimental validation is carried out using data from Split Hopkinson Pressure Bar (SHPB) tests, revealing a substantial increase in dynamic compressive strength, from 40 MPa (quasi-static) to 92 MPa at a strain rate of 78 s⁻¹ and 6% fiber content. Furthermore, the model predicts significant improvements in the modulus of elasticity (26.5 GPa to 29.3 GPa) and estimates failure lifetimes with a deviation of less than 5% from experimental results. The dynamic-to-static strength ratio is observed to reach up to 3.0, highlighting SFRC’s sensitivity to strain rate effects. This work offers a comprehensive framework for simulating SFRC’s performance under extreme loading conditions, providing critical insights for the design of resilient and efficient concrete structures subjected to dynamic and thermal extremes. Steel Fiber-Reinforced Concrete (SFRC) High Strain Rate Thermofluctuation Damage Model Dynamic Compressive Strength Split Hopkinson Pressure Bar (SHPB) Full Text Additional Declarations The authors declare no competing interests. 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. 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Response\u003c/strong\u003e\u003c/p\u003e","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":true,"hideJournal":true,"highlight":"","institution":"Southeast University","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":"Steel Fiber-Reinforced Concrete (SFRC), High Strain 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