A test method for determining macroscopic mechanical properties of granite based on nanoindentation test
A technology of nanoindentation and mechanical properties, which is used in the preparation of test samples, measuring devices, scientific instruments, etc.
Active Publication Date: 2018-10-26
HUBEI UNIV OF TECH
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Problems solved by technology
Although this method is simple in principle and easy to operate, it ignores the influence of the micro-mechanical properties of the minerals in the granite on the granite; when conducting the nano-indentation test experiment, it does not consider pressing the indentation point to the mineral area, and the micro-mechanical properties of each mineral parameter are analyzed. Second, the micro-mechanical parameters obtained by the nano-indentation test were not converted into the macro-mechanical properties of the granite as a whole
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[0060] The present invention will be described in further detail below in conjunction with accompanying drawing and specific embodiment
[0061] A kind of test method based on nano-indentation test to measure macroscopic mechanical property of granite, this test method comprises the following steps:
[0062] Step 1, Granite sample preparation, use a drill bit to drill and cut from the rock block to obtain a flat cylindrical granite sample. The research test uses a small cylindrical piece of granite with a diameter of 25mm and a thickness of 15mm, such as figure 1 As shown, the granite sample is then preliminarily polished, and the fineness of the sandpaper is respectively from 200 mesh, 400 mesh, 800 mesh, 1200 mesh, and 2000 mesh. flat, smooth surface;
[0063] Step 2, high-temperature treatment of granite samples. The granite samples obtained in step 1 are divided into multiple groups for high-temperature treatment. Each group of granite samples is first heated to a set tem...
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Abstract
The invention discloses a nano-impression test-based test method for determining the macroscopic mechanic properties of granite. The method comprises the following steps: carrying out high temperature treatment on a granite sample at a preset temperature, carrying out X-ray diffraction test, analyzing mineral components and the change of the mineral components with the temperature, using a nano-impression tester to measure all mineral mechanical properties and the change of the mechanical properties with the high temperature treatment at different preset temperatures, analyzing the influences of the microscopic mechanic properties of all minerals on the granite, obtaining the macroscopic mechanic properties of the granite by using the measured mineral mechanical properties and equalization method analysis, and compared with the obtained macroscopic mechanic properties with mechanical properties obtained through traditional mechanical test. The method provides a supplement for the macroscopic characteristics of the granite, provides a technical support for engineering practices, makes the macroscopic properties maximally approach practical engineering conditions, and provides reliable data guarantee for the safety of an engineering structure.
Description
technical field [0001] The invention belongs to the field of granite mechanics tests, and in particular relates to a test method for measuring macroscopic mechanical properties of granite based on a nano-indentation test. Background technique [0002] In recent years, with the rapid development of my country's economy and society, the improvement of people's living standards and the enhancement of environmental awareness, especially the increasing demand for clean energy. Energy issues are related to national security and development strategy, and environmental issues are related to the health and safety of citizens. The development of nuclear energy, a relatively clean energy, has become one of the effective means to solve energy and the environment. However, as a large country in the nuclear industry, my country produces a large amount of high-level radioactive waste from nuclear power plants, national defense, and scientific research, which is extremely toxic and has a lo...
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IPC IPC(8): G01N3/42G01N23/20G01N1/28G01N1/44
CPCG01N1/286G01N1/44G01N3/42G01N23/20G01N2203/0003G01N2203/0019G01N2203/008G01N2203/0682G01N2223/056G01N2223/1016
Inventor 张帆亢军杰郭翰群胡其志肖衡林肖本林胡智胡大伟邵建富弗雷德里克·斯科奇拉斯
Owner HUBEI UNIV OF TECH