A methodology to determine the elastic properties of anisotropic rocks from a single uniaxial compression test
A methodology to determine the elastic properties of anisotropic rocks from a single uniaxial compression test作者机构:Department of Earth SciencesETH ZurichZurichSwitzerland Geothermal Energy and GeofluidsDepartment of Earth SciencesETH ZurichZurichSwitzerland
出 版 物:《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报(英文版))
年 卷 期:2019年第11卷第6期
页 面:1166-1183页
核心收录:
学科分类:07[理学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0813[工学-建筑学] 0814[工学-土木工程] 0701[理学-数学] 070101[理学-基础数学]
基 金:financially supported by the Swiss Innovation Agency Innosuisse ispart of the Swiss Competence Center for Energy Research-Supply of Electricity (SCCER-SoE) the Werner Siemens Foundation ETH Zurich for their financial support
主 题:Transversely isotropic rock Elastic constants Young’s modulus Poisson’s ratio Seismic anisotropy Uniaxial compression Granite
摘 要:This paper introduces a new methodology to measure the elastic constants of transversely isotropic rocks from a single uniaxial compression *** first give the mathematical proof that a uniaxial compression test provides only four independent strain *** a result,the exact determination of all five independent elastic constants from only one test is not *** approximate determination of the Young’s moduli and the Poisson’s ratios is however practical and efficient when adding the Saint-Venant relation as the fifth *** formulae are then developed to calculate both secant and tangent definitions of the five elastic constants from a minimum of four strain *** results of this new methodology applied on three granitic samples demonstrate a significant stress-induced nonlinear behavior,where the tangent moduli increase by a factor of three to four when the rock is loaded up to 20 *** static elastic constants obtained from the uniaxial compression test are also found to be significantly smaller than the dynamic ones obtained from the ultrasonic measurements.