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Thermal expansion type triaxial loading method and device

A three-axis loading and thermal expansion technology, applied in the field of mechanical testing, can solve the problems of high stress applied to large-scale model samples, large oil cylinders, large loading frames, and high cost, so as to reduce construction costs and personnel costs, and save loading links , low cost effect

Pending Publication Date: 2021-05-07
INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the hydraulic loading method is widely used. Such tonnage not only leads to extremely large oil cylinders and loading frames, but also extremely high cost
It can be seen that under the condition of lower cost, it is difficult to apply high stress to large-scale model specimens

Method used

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  • Thermal expansion type triaxial loading method and device
  • Thermal expansion type triaxial loading method and device
  • Thermal expansion type triaxial loading method and device

Examples

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Effect test

Embodiment 1

[0046] A thermal expansion triaxial loading method utilizes the temperature stress generated by the surrounding medium due to temperature changes to realize the loading and unloading process of the tested object.

[0047] The thermal expansion type triaxial loading method specifically includes the following content: wrap the subject 1 in the surrounding medium 2, and closely fit the surrounding medium 2, and then heat the surrounding medium 2, and limit the surrounding medium 2 during the heating process. The deformation except the target loading direction is zero, so that the surrounding medium 2 produces temperature stress due to temperature changes and deformation constraints, which is applied to the test object 1 to realize the stress loading on the test object 1; after the loading is completed, the surrounding medium 2 is retreated. Temperature, so that the surrounding medium 2 is released due to temperature changes and deformation shrinkage, and the contact with the test ...

Embodiment 2

[0073] The core idea of ​​the present invention is to use the temperature stress generated by the surrounding medium due to temperature changes to realize the loading and unloading process of the tested object.

[0074] A thermal expansion type triaxial loading method according to the present invention specifically includes: wrapping the subject 1 in the surrounding medium 2, and closely fitting it, and then heating the surrounding medium 2, and restricting the removal of the surrounding medium 2 during the heating process. The deformation outside the target loading direction is zero, so that the surrounding medium 2 produces temperature stress due to temperature changes and deformation constraints, which is applied to the test object 1 to realize the stress loading on the test object 1; further, the surrounding medium 2 is degraded. Temperature, so that the surrounding medium 2 is released due to temperature changes and deformation shrinkage, and the contact with the test obje...

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Abstract

The invention relates to a thermal expansion type triaxial loading method and device. According to the loading method, the loading and unloading process of a tested object is realized by utilizing temperature stress generated by a surrounding medium due to temperature change; the loading device is the application of the loading method, the temperature change is converted into deformation for the first time by the loading method, then the deformation is converted into load to be applied to a tested object, and loading of a large-size model sample in a high-stress state is achieved; loading of true triaxial, conventional triaxial and other stress states can be realized through selection of surrounding media; the loading device is simple in structure, the labor intensity of personnel is reduced, and the cost is remarkably reduced; the device can be applied to occasions where various materials and objects such as metal and rock need high-temperature and high-pressure loading, is wide in practicability, and is very suitable for being popularized and applied in rock mechanical tests and other related subjects.

Description

technical field [0001] The invention belongs to the technical field of mechanical tests, and in particular relates to a thermal expansion type triaxial loading method and a device thereof. Background technique [0002] Mechanical tests are extremely common in the field of engineering technology. In these experiments, force loading is required on the test object, such as typical metal and rock material mechanical tests, and even soil mechanical tests. Many materials with higher strength often need to apply larger loads to achieve their goals. For the existing mechanical loading experiment technology based on pump work, applying a larger load means a larger investment. In recent years, with the continuous development of engineering construction, for example, the research on the development and utilization of deep energy resources and deep underground space has been paid more and more attention and has been continuously promoted. need. Therefore, how to control the cost and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18
CPCG01N3/18G01N2203/0003G01N2203/0226G01N2203/0256
Inventor 白冰次惠岭崔银祥雷宏武
Owner INST OF ROCK & SOIL MECHANICS CHINESE ACAD OF SCI
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