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Jointed rock dynamic fracture mode classification method based on optical measurement

A technology of optical measurement and classification method, applied in the field of rock mechanics and geotechnical engineering research, can solve the problems of low classification accuracy and difficulty, to simplify the classification steps, reduce the workload, and make up for the challenges and inaccuracies Effect

Pending Publication Date: 2021-11-16
TIANJIN UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0006] The technical problem solved by the present invention is that the traditional rock dynamic fracture mode classification method has low classification accuracy and great difficulty

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  • Jointed rock dynamic fracture mode classification method based on optical measurement
  • Jointed rock dynamic fracture mode classification method based on optical measurement
  • Jointed rock dynamic fracture mode classification method based on optical measurement

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Embodiment Construction

[0039] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The detailed description and accompanying drawings of the following embodiments are used to illustrate the principles of the present invention, but cannot be used to limit the scope of the present invention, that is, the present invention is not limited to the described embodiments, without departing from the spirit of the present invention Any modification, substitution and improvement of parts, components and connection methods are covered under.

[0040] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0041] It should be clear that each embodiment in this specification is described in a progressi...

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Abstract

The invention discloses a jointed rock dynamic fracture mode classification method based on optical measurement. The method comprises the following steps: placing a rock sample in a Hopkinson pressure bar device, and detecting the movement condition of each point in the transient dynamic fracture process of the rock sample in the fracture process of the rock sample; performing a dynamic mechanical test on the rock sample to obtain a corresponding fracture track; detecting displacement information on the fracture track; acquiring crack displacement characteristic information and strain characteristic information of the rock sample in the dynamic fracture process by adopting a digital image related technology according to the movement condition and displacement information of each point; converting the displacement information into displacement parameters under a local coordinate system through coordinates; completing displacement analysis near the tip of the crack based on local displacement analysis, and classifying dynamic fracture modes. The classification method aims at solving the problems that a traditional rock dynamic fracture mode classification method is low in classification accuracy and large in classification difficulty.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics and geotechnical engineering research, in particular to a method for classifying dynamic fracture modes of rocks containing joints based on optical measurement. Background technique [0002] According to the basic concept of fracture mechanics, the displacement field of fracture can be divided into three basic modes, namely type I (tensile crack or opening crack), type II (in-plane shear crack or sliding crack) and III mode. type (anti-plane shear crack or tear crack). And more complex cracks can be formed by the combination of these three simple cracks, which are called composite cracks. Based on the concept of fracture mechanics and previous studies, it can be concluded that the fracture mode is related to the displacement field near the crack tip. Therefore, through the specific study of the displacement field of the crack tip, based on the research of the displacement evolution of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06K9/62G06F119/14
CPCG06F30/20G06F2119/14G06F18/241
Inventor 吴帮标王佳璇刘丰董鹏
Owner TIANJIN UNIV
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