Bullet automatic filling servo device for SHPB dynamic impact test and using method

Abstract

The invention discloses a bullet automatic filling servo device for an SHPB dynamic impact test. The bullet automatic filling servo device includes an air storage chamber, a bullet launch tube and anair source device. One end of the bullet launch tube is connected with the air storage chamber, and the air storage chamber is connected with the air source device, and the bullet launch tube is mounted on the ground through a support. A plurality of forward-direction sliding supporting hubs and reverse sliding filling hubs are arranged in the bullet launch tube, and bullet position sensors are mounted on the bullet launch tube. According to the bullet automatic filling servo device, the launch and automatic filling of bullets during a dynamic impact test of a rock sample SHPB can be completedthrough an air storage system, a track control system and a bullet launch and filling system, and the high efficiency of the dynamic impact test of the rock sample SHPB is improved; a three-stage bullet position sensor arrangement mode not only ensures that a bullet fills a predetermined position, but also guarantees the friction and impact between the bullet and the bullet launch tube and the air storage chamber in the filling process, and rock dynamic test requirements and regulations under the dynamic impact conditions are met.

Description

technical field [0001] The invention relates to a bullet automatic filling servo device and a use method for SHPB dynamic impact tests, and belongs to the field of rock dynamics separated Hopkinson bar (SHPB) indoor tests. Background technique [0002] The split Hopkinson bar (hereinafter referred to as SHPB) is an effective test device for studying the dynamic mechanical properties of materials under one-dimensional stress state. Through the SHPB, dynamic impact mechanical tests of rock samples under high strain rates can be completed. Although our country has conducted in-depth research on SHPB and its tests, there are still deficiencies and worthy of further research: [0003] (1) During the SHPB test, in order to obtain multiple sets of rock sample test data and curves, it is inevitable to test multiple sets of rock samples. Therefore, when the next set of rock sample SHPB test bullets are filled, the SHPB The filling of bullets faces many problems. At present, most of...

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Problems solved by technology

[0005] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a bullet automatic filling servo device for SHPB dynamic impact test and its use method, which has the characteristics of high efficiency, safety and applicability, and can solve the problem of rock sample SHPB test. The problem of automatic filling of bullets in the process saves the waste of time and manpower and material resources caused by bullet filling in the test process

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