A Hopkinson rod rock sample impact test device and method
A Hopkinson rod and impact test technology, which is applied in the direction of using a single impact force to test the strength of materials, measuring devices, and preparation of samples for testing. The effect of reducing the probability of secondary crushing
Active Publication Date: 2022-04-26
CENT SOUTH UNIV
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Problems solved by technology
However, the above-mentioned device is not only complicated in structure, but also not conducive to observing the dynamic change process of the sample under the impact load because there is liquid in the test box.
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[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0033] see Figure 1-Figure 3 , a Hopkinson rod rock sample impact test device, including a SHPB device, a high-speed camera 1 and a spherical protective cover 2, the spherical protective cover 2 includes a pair of hemispherical covers 21 that are fastened to each other and can be folded, the hemispherical cover 21 includes a hemispherical frame 211 and a flexible intercepting cloth 212 wrapped on the hemispherical frame 211, the opposite sides of the protective co...
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The invention discloses a Hopkinson rod rock sample impact test device, which includes a SHPB device and a high-speed camera, and also includes a spherical protective cover, and the protective cover includes a pair of hemispherical covers that are interlocked and can be folded. The cover body includes a hemispherical framework and a flexible intercepting cloth wrapped on the hemispherical framework; the opposite sides of the protective cover are respectively provided with an incident rod perforation and a transmission rod perforation, and the incident rod and the transmission rod are respectively connected from the incident rod The perforation and transmission rod perforate into the protective cover to clamp the rock sample; the spherical flexible protective cover is also provided with an observation window facing the rock sample, and the lens of the high-speed camera is installed in the observation window . Compared with the traditional Hopkinson rod sample device, this test device can greatly reduce the probability of secondary crushing of splashed rock fragments, and is closer to the initial fragmentation degree under the impact of SHPB, ensuring the accuracy of the experimental results.
Description
technical field [0001] The invention belongs to the technical field of rock sample Hopkinson bar test, and in particular relates to a Hopkinson bar rock sample impact test device and method. Background technique [0002] In the rock dynamics testing process of the Flexible Hopkinson Bar (SHPB), the traditional rock collection device is usually a hard box set between the incident rod and the transmission rod, and the rock falls into the box after being broken. During the SHPB test, the crushing effect of the rock under the action of high-speed impact load is extremely obvious, and obvious debris splashing is often produced. When the flying cuttings hit the wall of the hard cuttings collection box, secondary crushing may occur. The morphology of the rock sample after crushing is an important indicator for analyzing the dynamic properties of the rock. The secondary crushing debris hitting the wall is extremely It greatly affects the accuracy of the experimental results. [00...
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IPC IPC(8): G01N3/30G01N3/02G01N3/06G01N1/44
CPCG01N3/30G01N3/02G01N3/068G01N1/44G01N2203/0067G01N2203/0098G01N2203/0682G01N2203/0694
Inventor 杨春周科平周诗彤高如高潘征熊信
Owner CENT SOUTH UNIV