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3D printing technology based artificial initial cracks containing rock-like specimen preparation method

A 3D printing, rock sample technology, applied in the fields of water conservancy and hydropower engineering, civil engineering, can solve problems such as difficulty in making built-in cracks

Inactive Publication Date: 2018-07-03
DALIAN UNIV OF TECH
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that it is difficult to make built-in cracks in the existing rock sample preparation methods, the present invention provides a method for preparing a rock-like material with built-in cracks

Method used

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  • 3D printing technology based artificial initial cracks containing rock-like specimen preparation method
  • 3D printing technology based artificial initial cracks containing rock-like specimen preparation method
  • 3D printing technology based artificial initial cracks containing rock-like specimen preparation method

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Embodiment Construction

[0017] The method for preparing a rock sample capable of producing tiny and closed joints of the present invention will be described in detail below in conjunction with the examples.

[0018] figure 1 , 2 , 3 show a closed fracture diagram of an ellipsoid with an inclination angle of 45°C. The preparation of a closed crack with an inclination angle of 45°C and an ellipsoid includes the following steps:

[0019] (1) Determine the size of the geometric model. The size of the sample is Φ50mm×100mm, the number of cracks n=1, the inclination angle α=45°C, the major axis of the elliptical crack is 20mm, the minor axis is 5mm; and the crack width is 2mm. The crack is located at the center of the sample.

[0020] (2) According to the determined model size, use the computer to establish the corresponding three-dimensional digital space model.

[0021] (3) Input the three-dimensional digital space model into the 3D printing device with one-time molding, and prepare the photosensiti...

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Abstract

The invention relates to a 3D printing technology based artificial initial cracks containing rock-like specimen preparation method, belonging to the technical field of civil engineering and water resources and hydropower engineering. According to the rock-like specimen preparation method, 3D printing equipment is adopted to produce a rock-like specimen containing artificial initial cracks, so thata multi-angle rock-like specimen containing inbuilt single cracks or multiple cracks can be produced; the adopted material is fragile unsaturated polyester resin with good transparency, the propertyof such resin is similar to that of real rocks, and can truly reflect the basis characteristics of fractured rock masses; the produced artificial initial cracks containing rock-like specimen can better research the initiation and propagation processes of cracks; according to the preparation method, rock-like specimen with built-in closed cracks can be made, the produced rock specimen cracks is higher in conformity with natural cracks, conditions such as the position and angle of the cracks can be intuitively and clearly observed, and thus making up the blank of the conventional rock preparation method that rock specimen with built-in closed cracks cannot be produced; and rock-like specimen with isotropy can be produced.

Description

technical field [0001] The invention relates to a method for preparing a rock-like sample with built-in cracks based on 3D printing technology, and belongs to the technical fields of civil engineering, water conservancy and hydropower engineering. Background technique [0002] Rock is a natural material with a large number of joints, fissures and microcracks inside. Due to the different number, angle and spatial position of fractures contained in rocks, the mechanical properties of rocks are complicated. The primary cracks in the rock mass are an important factor affecting the compressive strength and stability of the rock mass, and are very harmful to engineering. Therefore, it is of great engineering significance to study the mechanism and study of the fracture propagation mechanism in rocks. [0003] The interior of natural rocks is very complex, and it is difficult to obtain ideal rock samples with built-in cracks by manual mechanical drilling. It is also difficult to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 唐世斌乔盼盼
Owner DALIAN UNIV OF TECH
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