Constant confining pressure loading experiment device

Abstract

The invention discloses a constant confining pressure loading experiment device which comprises a pressing rod, an outer frame, a sleeve, a base and a strain gauge, the outer frame is provided with an upper panel and a lower bottom plate, the sleeve is vertically arranged on the lower bottom plate through the base, the base is provided with a columnar boss which protrudes upwards and is matched with the lower end of the inner side of the sleeve, and the strain gauge is arranged on the columnar boss. A through hole is formed in the upper panel, the pressing rod penetrates through the through hole downwards and then is matched with the upper end of the inner side of the sleeve, a limiting mechanism used for limiting the pressing rod to move upwards is arranged between the upper panel and the pressing rod, and when the pressing rod is in a limiting state, the pressing rod is matched with the upper end of the inner side of the sleeve. A sample space is arranged between the lower end of the pressing rod and the upper end of the columnar boss, and the strain gauge is arranged on the outer surface of the sleeve and corresponds to the sample space. The device is wide in application and good in universality, the strength and mechanical response of various materials under composite pressure can be tested, and loading compression can be quasi-static or dynamic impact.

Description

technical field [0001] The invention relates to the technical field of mechanical experiments, and more specifically relates to a constant confining pressure loading experimental device. Background technique [0002] In the study of materials, the mechanical properties of materials are very important, and the mechanical response under dynamic compression is a key part of it. Moreover, when various materials act in practice, the form of stress is often not only the action of uniaxial pressure, but also the form of simultaneous action of confining pressure and axial pressure. [0003] The confining pressure devices in the prior art are mainly aimed at large hard materials such as rocks and concrete, and mainly use uniaxial or multi-axial axial compression for small materials, but lack the performance measurement of small-scale materials under confining pressure. There is also a lack of measurement of the confining pressure of the material under the impact state, a lack of tes...

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Problems solved by technology

[0003] The confining pressure devices in the prior art are mainly aimed at large hard materials such as rocks and concrete, and mainly use uniaxial or multi-axial axial compression for small materials, but lack the performance measurement of small-scale materials under confining pressure. There is also a lack of measurement of the confining pressure of the material under the impact state, and the lack of testing of the uniaxial compression state under the state of constant confining pressure, and the lack of mechanical measurements under the pre-applied complex stress state

However, the current confining pressure tests are generally static compression, and there is no test method for impact compression under the condition of applying confining pressure.

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