Light one-way loading test device and application thereof

Abstract

The invention belongs to the field of micro tests of geotechnical engineering and material engineering and discloses a light one-way loading test device and an application thereof. The device comprises a machine body, a sample fixing assembly, a force sensor and a loading assembly. The machine body comprises a top plate, an upper connecting rod, a cylinder body, a lower connecting rod and a base which are sequentially fixed from top to bottom, and a cylinder bottom cover and an outer cylinder are sequentially fixed to the lower end of the cylinder body; the sample fixing assembly comprises a sample pipe sleeve, a cup head screw and a force transmission guide rod, and the sample pipe sleeve is fixed to the top plate and allows X-rays to penetrate through; the cup head screw is mounted at anupper end of the sample pipe sleeve, and the force transmission guide rod is positioned in the sample pipe sleeve to form a closed space in the sample pipe sleeve; the upper end of the force sensor is connected with the force transmission guide rod, and the lower end is connected with the loading assembly; and the loading assembly is used for driving the force transmission guide rod to move. In the invention, a problem that a mechanical behavior of a granular material cannot be visually observed in a micro material science test under CT scanning is solved, and a basis is provided for explaining a micromechanical behavior of the granular material.

Description

technical field [0001] The invention belongs to the micro-test field of geotechnical engineering and material engineering, and more specifically relates to a light-duty unidirectional loading test device and its application. Background technique [0002] When reclamation and island construction are carried out, the filling materials are mainly made of nearby reef rock and soil, and it is inevitable to encounter calcareous sand, a special rock and soil medium of marine biogenesis with a calcium carbonate content greater than 50%. Single particle unconfined uniaxial loading test and group particle confined compression test can effectively reveal its macroscopic mechanical properties, which are of great significance to its engineering application. However, since calcareous sand is mainly deposited by coral and shell fragments without long-distance transportation, it has special characteristics such as complex particle shape and rich internal pore structure. These characteristi...

AI Technical Summary

Problems solved by technology

However, the current research work on the influence of powder compression molding process parameters on density is still mainly focused on the stage of qualitative description, and the quantitative relationship between process parameters and porosity has not been studied in depth. How to capture the mechanical properties of powder during the molding process (particle distribution, porosity Changes, crystal breakage, interface behavior, etc.) are of great significance to quantitatively describe the molding process parameters and their molding quality

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