| 岩石类材料拉伸弹性模量测量方法的对比研究 |
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| 引用本文： | 张燕,于大伟,叶剑红.岩石类材料拉伸弹性模量测量方法的对比研究[J].岩土力学,2018,39(6):2295-2303. |
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| 作者姓名： | 张燕 于大伟 叶剑红 |
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| 作者单位： | 1. 武汉理工大学 资源与环境学院 安全工程系，湖北 武汉 430070；2. 中国地质大学（北京） 工程技术学院 土木工程系，北京 100083； 3. 中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，湖北 武汉 430071 |
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| 基金项目： | 国家自然科学基金青年基金（No.41702308）；武汉理工大学自主创新基金。 |
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| 摘 要： | 研究表明岩石材料在拉应力、压应力条件下具有不同的力学行为，因此，岩石材料存在两种弹性模量，分别为拉伸弹性模量和压缩弹性模量。为了甄别出直梁弯折试验和巴西劈裂试验哪一种更加适合测试岩石材料的拉伸弹性模量，以大理岩、花岗岩和砂岩为典型的岩石类型，开展了一系列的单轴压缩、直接拉伸、三点弯折和巴西劈裂试验，测试了岩石材料的拉伸弹性模量；并对测试结果的可靠性、准确性开展了系统的对比研究。最终发现，巴西劈裂试验因为较好的测量精度、制样简便、试验操作简单等因素，可以成为测量岩石材料拉伸弹性模量的推荐方法。
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| 关 键 词： | 拉伸弹性模量 直接拉伸试验 岩石弹性模量 三点弯折试验 巴西圆盘劈裂试验 |
| 收稿时间： | 2017-12-29 |
Study on measurement methodology of tensile elastic modulus of rock materials |
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| ZHANG Yan,YU Da-wei,YE Jian-hong.Study on measurement methodology of tensile elastic modulus of rock materials[J].Rock and Soil Mechanics,2018,39(6):2295-2303. |
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| Authors: | ZHANG Yan YU Da-wei YE Jian-hong |
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| Institution: | 1. Department of Safety Engineering, School of Resources & Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China; 2. Department of Civil Engineering, School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China; 3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China |
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| Abstract: | It is well known that rock materials have different mechanical behaviors under the compressive and tensile loading. Correspondingly, there are two types of elastic modulus; they are compressive elastic modulus Ec, and tensile elastic modulus Et, respectively. In order to distinguish which indirect test methodologies, including three-points bending test and Brazilian disc test, is more suitable to measure the tensile elastic modulus Et of rock materials, a series of experimental tests, including uniaxial compressive test (UCT), direct tensile test (DTT), three-points bending test, as well as the Brazilian disc test is performed for three typical types of rock: white marble, granite and sandstone. Based on these experimental results, comprehensive comparative investigation on the reliability of these measurement methods for tensile elastic modulus Et of rock materials is systematically conducted. Finally, it is found that the Brazilian disc test could be a suitable and reliable method to measure the tensile elastic method of rock materials, due to the excellent agreement with that measured by direct tension tests, and due to the simplicity of sample preparation, as well as test operation. |
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| Keywords: | tensile elastic modulus direct tensile test elastic modulus of rocks three-points bending test Brazilian disc test |
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