Method for measuring internal stress field of non-continuous structural body

A technology of internal stress and measurement method, which is applied in the direction of force measurement, measurement force, measurement device, etc. by measuring the change of optical properties of materials when they are stressed, and can solve the problem that the stress field cannot be displayed quantitatively and visually.

Pending Publication Date: 2018-05-25
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0005] The invention provides a method for measuring the internal stress field of a discontinuous structure to solve the problem that the existing experiment and testing technology can only infer the internal stress field indirectly, but cannot quantitatively and visually display the stress field

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  • Method for measuring internal stress field of non-continuous structural body
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  • Method for measuring internal stress field of non-continuous structural body

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[0038] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0039] The invention provides a method for measuring the internal stress field of a discontinuous structure to solve the problem that the existing experiment and testing technology can only infer the internal stress field indirectly, but cannot quantitatively and visually display the stress field.

[0040] Specifically, for the measurement method of the internal stress field of the discontinuous structure, see figure 1 ,include:

[0041] S101. The computer digitally reconstructs the scanning result of the discontinuous structure to obtain a three-dimensional digital model of the discontinuous structure;

[0042] In specific practical applications, micro-focus industrial CT (Computed Tomography, X-ray computer tomography) can be used t...

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Abstract

The invention provides a method for measuring the internal stress field of a non-continuous structural body. The final stress measurement result is obtained based on multiple identical transparent three-dimensional physical photoelastic models, the three-dimensional physical photoelastic models are further acquired through digital reconstruction and 3D printing of the microfocus CT scanning resultof the non-continuous structural body, and the method is different from experiments and the test technology only indirectly speculating the internal stress field of a complex structural body in the prior art. The method is advantaged in that in combination with digital reconstruction, the 3D printing technology, the stress freezing technology and the three-dimensional stress characterization method, the internal stress field of the non-continuous structural body can be directly measured through the transparent three-dimensional physical photoelastic models, and a problem of incapability of realizing visual and quantitative display of the internal stress field from the perspective of physics experiments is solved.

Description

technical field [0001] The invention relates to the technical field of internal stress field measurement, in particular to a method for measuring the internal stress field of a discontinuous structure. Background technique [0002] At present, discontinuous structures containing pores and cracks have been widely used in various engineering fields, such as underground rock structures, machinery, aerospace, bridges, etc. These structures contain a large number of randomly distributed pores (cracks) of different scales and shapes, which are connected and connected to each other to form a complex pore (crack) network structure. [0003] The internal pore (crack) network structure of these structures and its stress field distribution and evolution play a decisive role in the external physical and mechanical response of the engineering structure: for example, in the field of oil and gas exploitation, the characteristics of the pore (crack) network structure determine the reservoir...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/24
CPCG01L1/241
Inventor 鞠杨郑泽民卢晋波刘红彬刘鹏贺可鑫王里赵熙
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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