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A kind of sample fixture for Brazilian splitting and using method

A sample fixture, Brazilian splitting technology, applied in the direction of applying stable tension/pressure to test the strength of materials, instruments, measuring devices, etc., can solve problems such as affecting the test accuracy, achieve accurate test data, convenient positioning, and simple disassembly Effect

Active Publication Date: 2021-07-16
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Chen Shaojie of Shandong University of Science and Technology et al. Auxiliary device for testing rock tensile strength by Brazilian method (CN103471909A). Although the operation is simple, the column and the positioning frame will rub against the test accuracy during the actual compression process of the specimen.

Method used

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  • A kind of sample fixture for Brazilian splitting and using method
  • A kind of sample fixture for Brazilian splitting and using method
  • A kind of sample fixture for Brazilian splitting and using method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Such as Figure 1-Figure 5 Shown: This implementation discloses a sample fixture for Brazilian splitting, including: a support 1, a positioning disc 2 and a positioning pin assembly.

[0056] Wherein, the support 1 includes a bottom platform and a positioning vertical wall arranged on the bottom platform;

[0057] The positioning vertical wall is provided with a first positioning slot 3a, a second positioning slot 3b, a third positioning slot hole and a fourth positioning slot hole; the first positioning slot 3a, the second positioning slot 3b and the fourth positioning slot hole are arranged with the third positioning slot hole as a circle center.

[0058] The locating pin assembly includes: a first locating pin 4a, a second locating pin 4b, a third locating pin 4c and a lower pad 7; the first locating through groove 3a, the second locating through groove 3b, the The third positioning slot and the fourth positioning slot are respectively used to pass through the firs...

Embodiment 2

[0075] Such as Figure 1-Figure 5 Shown: This embodiment discloses a sample fixture for testing the tensile strength of rock by the Brazilian split method, including a support 1, a positioning disc 2, a positioning groove, a first positioning pin 4a, and a second positioning pin 4b, the third positioning pin 4c, pads, upper pads 6, and lower pads 7. The support 1 is connected with the positioning disc 2 through three positioning pins. The positioning disc 2 can rotate clockwise or counterclockwise, and the first and second positioning pins move in the first and second positioning slots as the positioning disc 2 rotates. The upper spacer 5 can be freely disassembled from the support 1, and the lower end of the upper spacer 5 is connected with the upper spacer 6 as a whole. The center line of the bottom platform of the support is provided with a bottom strip groove, and an appropriate amount of colloid is applied to the bottom strip groove, and the bottom strip 7 is bonded and...

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Abstract

The invention relates to a sample fixture for Brazil splitting, comprising: a support, a positioning disc and a positioning pin assembly; the support includes a bottom seat and a positioning vertical wall arranged on the bottom seat; the positioning vertical wall is provided with The first positioning slot, the second positioning slot, the third positioning slot and the fourth positioning slot; the first positioning slot, the second positioning slot and the fourth positioning slot are arranged with the third positioning slot as the center of the circle The positioning pin assembly includes: the first positioning pin, the second positioning pin, the third positioning pin and the lower pad; the first positioning through slot, the second positioning through slot, the third positioning slot hole and the fourth positioning slot hole are respectively used It is used to pass through the first positioning pin, the second positioning pin, the third positioning pin and the lower pad; twisting the positioning disc can control the first positioning pin and the second positioning pin to clamp or loosen the rock test located on the other side of the positioning vertical wall. pieces. The sample fixture provided by the present invention is small and exquisite, and the positioning of the rock sample can be implemented only by rotating the positioning disk clockwise and counterclockwise.

Description

technical field [0001] The invention belongs to the technical field of rock mechanics tests, and relates to a sample fixture for Brazilian splitting and a use method. Background technique [0002] The tensile strength of rock in rock engineering refers to the ultimate stress value when a rock sample reaches failure under tension. The tensile strength of rock is an important mechanical property index of rock, and it is also a control parameter for the safety and stability analysis of rock structure design. Therefore, testing the tensile strength of rock has great engineering significance. [0003] Generally, there are many test methods for determining the tensile strength of rock, which can be roughly divided into two types: direct tensile method and indirect method. However, the direct tensile test should avoid the problem of stress concentration and is limited by clamping conditions. Generally, the indirect tensile method is used to determine. Indirect method There are m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/04G01N3/08
CPCG01N3/04G01N3/08G01N2203/0003G01N2203/0019G01N2203/0067G01N2203/0258G01N2203/0266G01N2203/04
Inventor 李文昕冯夏庭杨成祥田军
Owner NORTHEASTERN UNIV LIAONING
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