Portable self-seal rock SHPB (split Hopkinson pressure bar) test confining pressure loading device

Abstract

The invention discloses a portable self-sealing rock SHPB test confining pressure pressurization device, which belongs to the field of rock mechanics dynamics indoor test measurement. The cylinder body of the confining pressure device is provided with an oil inlet and an exhaust port, and there are cover plates at both ends. There are concentric circular holes of equal size in the center of the cover plate. The size of the hole can be changed according to the size of the test rock sample. The U-shaped synthetic rubber holster, the hydraulic oil is filled between the holster and the cylinder body, and the test rock sample is placed in the double U-shaped synthetic rubber holster. The whole system adopts the hydraulic oil self-sealing principle, and the oil inlet is connected to the pressurized system through the high-pressure oil pipe, and the confining pressure in the cylinder can be monitored in real time through the pressurized system. The invented portable self-sealing rock SHPB test confining pressure device can apply a stable confining pressure value of more than 100MPa in the radial direction in a relatively short period of time, and the rock sample can be pasted with strain gauges and drawn out from the round hole of the cover plate with wires for real-time monitoring The deformation process of the rock under the impact load, and the system has the advantages of simple operation, stable confining pressure, and easy portability.

Description

technical field [0001] The invention relates to the field of measuring indoor rock mechanics dynamic test indicators, in particular to a confining pressure device which uses a self-sealing principle to make the confining pressure reach more than 100 MPa, and rock samples can be pasted with strain gauges to monitor deformation characteristics under dynamic load in real time. Background technique [0002] The SHPB (Hopkinson Pressure Bar Test) test under confining pressure in the rock chamber is an important mechanical index for studying the dynamic impact of rocks under confining pressure. With the exploitation of deep resources, it is urgent to study the dynamic behavior of rocks under confining pressure. At present, the principle of SHPB confining pressure device in China is complicated, the installation is cumbersome, and the confining pressure value is relatively small. [0003] The basic principle of the invention is to press the hydraulic oil into the space between the ...

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Problems solved by technology

At present, the principle of the domestic SHPB confining pressure device is comp...

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