文献类型：期刊文献

英文题名：Measurement of Elastic Bi-modulus of Rock-type Materials: Insight from comparative and parallel tests

作者：Zhang, Yan[1];Zheng, Hao[2,3];He, Huiling[1,2];Sha, Peng[5];Wang, Linlin[6];Qi, Shengwen[4];Huang, Xiaolin[7];Ye, Jianhong[2]

机构：[1]Wuhan Univ Technol, Sch Safety Sci & Emergency Management, Wuhan, Hubei, Peoples R China;[2]Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan, Peoples R China;[3]China Univ Geosci Beijing, Sch Engn & Technol, Beijing, Peoples R China;[4]Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China;[5]Shaoxing Univ, Sch Civil Engn, Shaoxing, Zhejiang, Peoples R China;[6]Qingdao Housing & Urban Rural Dev Bur, Qingdao, Shandong, Peoples R China;[7]Xi An Jiao Tong Univ, Dept Civil Engn, Xian 710049, Shaanxi, Peoples R China

年份：2024

卷号：83

期号：6

外文期刊名：BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT

收录：SCI-EXPANDED(收录号：WOS:001232679000001)、、EI(收录号：20242216175657)、Scopus(收录号：2-s2.0-85194264659)、WOS

基金：This work is grateful for the funding support from the National Natural Science Foundation of China, Grant No. 42307234.

语种：英文

外文关键词：Tensile elastic modulus; Bi-modulus material; Digital Image Correlation (DIC) technology; Brazilian Disc test; Three-point bending test; Elastic modulus measurement

外文摘要：Rock materials exhibit different elastic moduli under tension and compression, making them typical bi-modulus materials. Few testing methods can measure both tensile and compressive moduli (E-t and E-c) of such materials simultaneously, and with their reliability not systematically validated. Taking blue and red sand rocks as the example, this study performed a series of uniaxial compression, direct tension, Brazilian disc, and three-point bending tests, in which strain gauges and DIC technology were used to observe the deformation. Through comprehensively comparative study, the following findings are obtained: (1) Direct tension and compression tests remain the most reliable methods for measuring the E-t and E-c of rock materials. (2) Only the sub-method I based on the Brazilian disc test proposed by Ye et al in (Int J Rock Mech Min Sci 46(3):568-576, 2009a) exhibits good reliability. (3) Three-point bending test is not recommended due to the adverse effect caused by the stress concentration in the region beneath the loading head. (4) Strain gauges theoretically offer a high measurement accuracy, but their results are significantly influenced by artificial factors; while DIC technology demonstrates a higher reliability when strain exceeds a threshold (e.g., > 500).