Study on the strength characteristics of sandstone subjected to coupled static and dynamic loads from the perspective of microscopic crack propagation

Study on the strength characteristics of sandstone subjected to coupled static and dynamic loads from the perspective of microscopic crack propagation | 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 Study on the strength characteristics of sandstone subjected to coupled static and dynamic loads from the perspective of microscopic crack propagation Zi-jie Hong, Kai Si, Zhen-hua Li, Chun Zhu, Feng Du, Zhengzheng Cao This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-4227737/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 03 Mar, 2025 Read the published version in Geomechanics and Geophysics for Geo-Energy and Geo-Resources → Version 1 posted 10 You are reading this latest preprint version Abstract A series of engineering dynamic disasters, such as rock burst and roof caving, are closely related to the damage and strength characteristics of rock under dynamic load. The research of this topic is helpful to accurately understand the mechanism of rock dynamic disasters, make predictions in advance and take appropriate measures to reduce losses. In order to further study the dynamic failure characteristics of rock, a theoretical model of dynamic wing crack propagation of sandstone under the condition of coupled static and dynamic loads was proposed in the paper. The effects of strain rate, pre-static stress and confining pressure on the damage process and strength of sandstone were quantitatively revealed by theoretical model. The proposed dynamic wing crack propagation model actually represents the tensile damage of rock and is suitable for the macroscopic tensile fracture of rock under the action of dynamic load. By comparing with SHPB experimental results, it shows that the theoretical model can effectively predict the coupled static and dynamic strength of sandstone and explain the damage and fracture process. In addition, the differences between the theoretical model and the experimental results were analyzed in detail. The research results of the paper can provide a theoretical reference for further understanding of the occurrence mechanism of rock mass dynamic disasters, and provide a theoretical model basis for future numerical simulation research. Coupled static and dynamic loads Rock dynamic strength Crack propagation model Tensile damage Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Published Journal Publication published 03 Mar, 2025 Read the published version in Geomechanics and Geophysics for Geo-Energy and Geo-Resources → Version 1 posted Editorial decision: Revision requested 30 Dec, 2024 Reviews received at journal 29 Dec, 2024 Reviewers agreed at journal 28 Dec, 2024 Reviews received at journal 28 Apr, 2024 Reviewers agreed at journal 24 Apr, 2024 Reviewers agreed at journal 24 Apr, 2024 Reviewers invited by journal 24 Apr, 2024 Editor assigned by journal 24 Apr, 2024 Submission checks completed at journal 10 Apr, 2024 First submitted to journal 06 Apr, 2024 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-4227737","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":289855587,"identity":"6db6dec8-76e7-4f90-8b49-a840493c22bb","order_by":0,"name":"Zi-jie Hong","email":"","orcid":"","institution":"Henan Polytechnic University","correspondingAuthor":false,"prefix":"","firstName":"Zi-jie","middleName":"","lastName":"Hong","suffix":""},{"id":289855588,"identity":"4d3d3bd1-4fc0-4e7c-91b1-e809636d5c5c","order_by":1,"name":"Kai 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