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Driving dynamic-static loading experimental device for confining pressure and explosion

A technology for loading experiments and experimental devices, which is applied to measuring devices, using stable tension/pressure to test the strength of materials, instruments, etc., can solve problems such as the inability to accurately analyze the dynamic structure relationship and failure characteristics of rock materials, and achieve uniform pressure , The effect of eliminating interference

Pending Publication Date: 2018-08-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0005] The purpose of the present invention is to provide an active confining pressure and explosive dynamic and static loading experimental device to solve the problem that the dynamic structure relationship and failure characteristics of rock materials cannot be accurately analyzed in the prior art

Method used

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  • Driving dynamic-static loading experimental device for confining pressure and explosion
  • Driving dynamic-static loading experimental device for confining pressure and explosion
  • Driving dynamic-static loading experimental device for confining pressure and explosion

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Embodiment

[0027] In actual operation, the built-in sensor is placed inside the test piece 103 . When making the test piece 103, each set of test pieces consists of two pieces, A and B, and A is the research object, and DIC and strain tests are performed on both ends of A. On the end face of the strain gauge test, in order to eliminate the tensile effect of the axially reflected wave, the B piece is used to closely fit the test end face, and at the same time, mark points are processed on the DIC test face (the position corresponds to the strain gauge). Four wedges are used to fix the relative position of the specimen. For easy operation, the high-pressure oil pump can be manually operated as needed. For each jack, a pressure calibration must be performed prior to the experiment. Usually the oil pressure gauge is used to measure the pressure, which is installed on the oil separator. By installing a pressure sensor in front of the jack piston head, the actual pressure of the jack can be...

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Abstract

The invention discloses a driving dynamic-static loading experimental device for confining pressure and explosion. The driving dynamic-static loading experimental device comprises an experimental device, a hydraulic system device, a surface-strain measuring system and an internal-strain measuring system, wherein the hydraulic system device, the surface-strain measuring system and the internal-strain measuring system are connected together by the experimental device. The driving dynamic-static loading experimental device disclosed by the invention has the advantages that the two-way stable pressure loading process is realized by the hydraulic system device, and by transition devices such as wedge-shaped blocks, the pressure on a test piece is more uniform and stable; by an internal sensor,accurate control for the internal response process of the test piece can be realized and simultaneously the interference effect of the boundary effect on the experiment is eliminated; by use of the internal sensor and an external high-speed shooting system, not only can the deformation process of the test piece under combined loading be captured, but also the growth and extension rules of microcracks of rock can be analyzed simultaneously; the driving dynamic-static loading experimental device is more beneficial to analyzing the process of large deformation or macroscopic fracture in engineering practices.

Description

technical field [0001] The invention relates to the technical field of confining pressure loading and explosion experiments, in particular to an active confining pressure and explosion dynamic and static loading experimental device. Background technique [0002] With the increasing depth of underground engineering and military facilities, the research on the fracture mechanism of deep rocks under the action of explosive dynamic loads in high geostress environments has gradually attracted people's attention. After the rock is subjected to strong dynamic loads such as explosions, the initial prestress and the explosion stress wave superimpose each other to form a complex loading environment, and the rocks produce micro-cracks, crack penetration, and fragmentation under combined loading. [0003] For the phenomena of micro-cracks, crack penetration and fragmentation of rocks under combined loading, similar model tests are usually used for analysis. The similar model test is an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12G01N3/313
CPCG01N3/12G01N3/313
Inventor 杨军何成龙
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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