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Double-sided dynamic shear testing device and method based on Hopkinson pressure bar system

A technology of Hopkinson compression bar and testing device, which is applied in the direction of applying stable shear force to test the strength of materials, measuring devices, and optical devices, etc., and can solve problems such as dynamic shearing of rock structural surfaces.

Pending Publication Date: 2022-06-28
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

[0005] The purpose of the present invention is to provide a double-sided dynamic shear test device and method based on the Hopkinson pressure bar system, aiming at solving the problem of the existing dynamic shear and friction measurement device based on the Hopkinson pressure bar through direct shearing. The problem of not being able to perform dynamic shear on rock structural planes under medium and high strain rate dynamic loads

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  • Double-sided dynamic shear testing device and method based on Hopkinson pressure bar system

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[0027] The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

[0028] see Figure 1 to Figure 3 In the first aspect, the present invention provides a double-sided dynamic shear test device based on the Hopkinson pressure bar system, including a rock sample 1, a test device 2, a force application mechanism 3, a signal shear mechanism 6 and a displacement shear Agency 27,

[0029] The rock sample 1 is arranged in the test device 2 , the force applying mechanism 3 is arranged on the outer side wall of the rock sample 1 , and the signal shearing mechan...

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Abstract

The invention relates to the technical field of measuring devices, in particular to a double-sided dynamic shear testing device and method based on a Hopkinson pressure bar system, and the double-sided dynamic shear testing device comprises a rock sample, a testing device, a force application mechanism, a signal shear mechanism and a displacement shear mechanism, the force applying mechanism impacts a rock sample subjected to normal stress, and the displacement shearing mechanism collects dynamic change of the rock sample to obtain a dynamic speckle image and analyzes the dynamic speckle image to obtain a rock sample surface displacement field evolution law and a dynamic slip rate; an incident pulse signal, a reflection pulse signal and a transmission pulse signal which are generated when the force applying mechanism impacts the rock sample are acquired and analyzed through the signal shearing mechanism, so that incident energy, reflection energy and transmission energy are obtained; the problem that direct shearing of an existing dynamic shearing and friction measuring device based on the Hopkinson pressure bar cannot dynamically shear a rock structural surface under the action of medium-high strain rate dynamic load is solved.

Description

technical field [0001] The invention relates to the technical field of measuring devices, in particular to a double-sided dynamic shear testing device and method based on a Hopkinson pressure bar system. Background technique [0002] For example, a deep fault in a state of shear creep will undergo dynamic shear slip when subjected to dynamic shocks such as blasting vibration generated by the development of deep rock masses, resulting in strong vibration and release of a large amount of elastic energy storage, causing seismic activity and underground Therefore, high normal stress and tangential dynamic load (strain rate between 10 1 ~10 4 s -1 The experimental study on the double-sided dynamic shear test of rock under the action of the two-side dynamic shear-sliding failure is of great significance for revealing the disaster mechanism and stability evaluation of dynamic shear-slip instability of dynamic-triggered structural planes. [0003] At present, the dynamic shear te...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24G01N3/04G01B11/16G01B11/02
CPCG01N3/24G01N3/04G01B11/16G01B11/02G01N2203/0025
Inventor 李子运朱芸惠刘东燕赵宝云黄伟董倩周兆银谢松苟爽李潮鑫
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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