{"title":"Assessment of Young’s modulus of small-sized rock samples based on macroindentation testing","authors":"Yujie Luo, Yang Zhang, Qian Wang, Jinliang Song, Dawei Hu, Hui Zhou","doi":"10.1007/s11440-024-02520-8","DOIUrl":null,"url":null,"abstract":"<div><p>Assessing the Young’s modulus of deep rock formations is essential for deep rock engineering. However, obtaining high-quality cores remains challenging. This study introduces a macroindentation method to evaluate the Young’s modulus of small-sized rock samples, which are easier to obtain. Comprehensive experiments were conducted on fused quartz, shale, sandstone, limestone, and granite, and the <span>\\(\\Phi\\)</span>1 mm and <span>\\(\\Phi\\)</span>2.5 mm Brinell indenters were found to provide consistent results. Numerical simulations demonstrated the influence of substrate effect on indentation depth, and system compliance was defined to account for the combined effects of machine deformation and substrate effect. An improved five-step loading method was developed to calibrate system compliance, yielding results comparable to those from uniaxial compression tests. This method offers a practical alternative for evaluating the mechanical properties of rocks in deep engineering applications.</p></div>","PeriodicalId":49308,"journal":{"name":"Acta Geotechnica","volume":"20 5","pages":"2257 - 2278"},"PeriodicalIF":5.7000,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acta Geotechnica","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s11440-024-02520-8","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, GEOLOGICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Assessing the Young’s modulus of deep rock formations is essential for deep rock engineering. However, obtaining high-quality cores remains challenging. This study introduces a macroindentation method to evaluate the Young’s modulus of small-sized rock samples, which are easier to obtain. Comprehensive experiments were conducted on fused quartz, shale, sandstone, limestone, and granite, and the \(\Phi\)1 mm and \(\Phi\)2.5 mm Brinell indenters were found to provide consistent results. Numerical simulations demonstrated the influence of substrate effect on indentation depth, and system compliance was defined to account for the combined effects of machine deformation and substrate effect. An improved five-step loading method was developed to calibrate system compliance, yielding results comparable to those from uniaxial compression tests. This method offers a practical alternative for evaluating the mechanical properties of rocks in deep engineering applications.
期刊介绍：
Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.
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