Direct tension test testing device for high-freedom degree fragile material and a testing method based on device

Abstract

The invention discloses a direct tension test testing device for a high-freedom degree fragile material and a testing method based on the device. The direct tension test testing device comprises an accurate deformation monitoring device and a gyroscope centering adjustment device, wherein the accurate deformation monitoring device can be utilized to exclude the deformation of a testing machine and a tension device and only acquire the self direct tension deformation of the fragile material, especially the deformation of a small-sized fragile material; the gyroscope centering adjustment device prevents the problems of eccentric tension and distorted tension of fragile materials, such as rocks, concrete and ceramics as being high in left-right deflexion and space rotation sensitivity and can obtain the real direct tension strength of the fragile material. The direct tension test testing device disclosed by the invention has the advantages of simple construction, convenience for operation and easiness for assembly and disassembly, solves the problem that the eccentric tension, the distorted tension and the deformation can not be directly monitored in the direct tension process of the fragile material and can accurately obtain the direct tension strength, direct tension deformation and a direct tension stress-strain curve of the fragile material.

Description

technical field [0001] The invention belongs to the field of testing mechanical properties of brittle materials, and relates to a high-degree-of-freedom brittle material CZ test device and a test method thereof with a precise deformation monitoring device. Background technique [0002] Generally speaking, rocks, concrete, and ceramics are all considered as brittle materials. These brittle materials are compressive but not tensile, and their failure areas often start from the tensile stress area. Therefore, there are important theories and principles for testing the tensile mechanical properties of brittle materials. Engineering significance. Taking the rock tensile performance test as an example, the main method to study the tensile mechanical properties of rock is the Brazilian disc splitting test, which is an indirect method to obtain the tensile mechanical properties of rock, but its results are different from the direct tensile results of rocks. There is a certain gap, ...

AI Technical Summary

Problems solved by technology

[0005] 3. Most of the existing stretching devices do not have a deflection structure, which cannot solve the problem of eccentric stretching;

[0006] 4. A small number of stretching devices with a deflection structure have low adjustment sensitivity and are gradually adjusted as the force increases;

[0007] 5. The existing stretching device has poor spatial rotation ability, which may easily cause twisting and stretching in the direct stretching process

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