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Contact surface bidirectional shear test device

A test device, two-way shearing technology, applied in the direction of measuring device, using a stable shear force to test the strength of materials, instruments, etc., can solve the problems of the two-way shear test device that has not been reported in the contact surface, and achieve the structure of the device simple effect

Pending Publication Date: 2019-08-27
NANJING HYDRAULIC RES INST
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Problems solved by technology

[0004] The tests carried out by the above-mentioned contact surface test devices are all carried out under the condition of unidirectional shear, and there is no report on the two-way shear test device of the contact surface.

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Embodiment Construction

[0038] The technical solution of the present invention will be further elaborated below in conjunction with the description of the drawings and specific embodiments.

[0039] Such as Figure 1~3 The shown test device includes an upper shear box 7, a lower shear box 12, a normal pressure device 4, an X-direction shear transmission device 16, a Y-direction shear transmission device 24, an X-direction push device 15, and a Y-direction push device 15. Pushing device 23, X / Y direction moving device and data acquisition device. The X / Y direction moving device includes X guide rail and Y guide rail. The data acquisition device includes an X-direction force sensor 1 , a Y-direction force sensor 20 , an X-direction displacement sensor 2 , a Y-direction displacement sensor 22 , a normal displacement sensor 3 and a normal force sensor 5 .

[0040] The upper shear box 7 and the lower shear box 12 respectively contain the samples 9 and 10 to be tested for the contact surface test; in thi...

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Abstract

The invention relates to a contact surface bidirectional shear test device, comprising an upper shear box, a lower shear box, a normal pressure device, an X / Y direction shear transmission device, an X / Y direction thrusting device, an X / Y direction moving device and a data collection device. According to the device provided by the invention, the upper shear box is fixed, the lower shear box can perform shear in the X / Y direction by means of the X / Y direction shear transmission device to generate a shear displacement, the contact area of upper and lower samples remains unchanged during the test,and there is no need to correct the area. The device can also study the mutual embedding characteristics of soil bodies made of different materials by applying normal loads. The device provided by the invention can test the stress deformation characteristics in the X / Y direction and the mutual embedding characteristics in the normal direction of the contact surfaces of soil bodies with differentengineering characteristics, and the indoor experimental research on the stress deformation characteristics of the contact surface in different directions is achieved. During the test, the applicationof load, shear displacement and shear rate setting and data collection are all controlled by a computer, and the test device has high measurement accuracy, simple and easy operation, and a low test cost.

Description

technical field [0001] The invention relates to a contact surface bidirectional shear test device, which is suitable for measuring the interface friction characteristics of the same material or different materials, especially for continuously measuring the interface friction characteristics of the X and Y directions of the contact surface, and can also be used It is used to study the mutual embedding mechanism of different material contact surfaces under vertical load. The test device can carry out conventional direct shear tests on constant shear planes and variable shear planes. Background technique [0002] The contact surface problem is an important research subject in the field of geotechnical engineering. The problem of the contact surface between soil and structure, soil and soil is involved in earth-rock dam engineering, port wharf, bridge tunnel, foundation and other projects. Under the action of external load, due to different material soil or structure Stress co...

Claims

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Application Information

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IPC IPC(8): G01N3/24G01N3/02
CPCG01N3/02G01N3/24G01N2203/0025G01N2203/0258G01N2203/0676G01N2203/0682
Inventor 李小梅蔡正银张民王芳傅中志韩林袁龙顾行文
Owner NANJING HYDRAULIC RES INST
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