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Two-way stretch tester and testing method for internal pressure thin-wall cylinder test sample of geomembrane

A thin-walled cylinder, biaxial stretching technology, used in measuring devices, using stable tension/pressure to test the strength of materials, instruments, etc., can solve the problem of not providing enough clamping force, and achieve a simple and reliable device structure. , to avoid the problem of stress uniformity in the biaxial tensile test, and the effect of simple and reliable structure

Inactive Publication Date: 2014-05-07
HOHAI UNIV
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Problems solved by technology

[0006] Purpose of the invention: the purpose of the present invention is to address the deficiency of the mechanical performance test method under the condition of geomembrane bidirectional stress and the defect that the original test device cannot provide sufficient clamping force when clamping the sample, and proposes a method that considers flexibility. Geomembrane Internal Pressure Thin-walled Cylinder Test Device and Test Method for Large Deformation Factor of Geomembrane Sample

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  • Two-way stretch tester and testing method for internal pressure thin-wall cylinder test sample of geomembrane
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  • Two-way stretch tester and testing method for internal pressure thin-wall cylinder test sample of geomembrane

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[0031] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0032] Please refer to figure 1As shown, the test device of the present invention includes a set of universal tensile machine 1 , a first disc-shaped sealing fixture 21 , a second disc-shaped sealing fixture 22 , an image capture system 3 , and an air compressor air pump 4 . The universal tensile machine includes a host computer, a data acquisition system and a data processing system, and the air compressor air pump 4 is used to adjust the internal pressure of the sample...

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Abstract

The invention discloses a two-way stretch tester and a testing method for an internal pressure thin-wall cylinder test sample of a geomembrane. Due to the adoption of the tester and the testing method, provided by the invention, the problem in stress equilibrium of a cross-shaped test sample on the plane of the geomembrane in a two-way stretch test can be solved, meanwhile, the problem that the traditional internal pressure thin-wall cylinder test is not suitable for flexible materials such as the geomembrane is solved, and finally the two dimensional stress strain curve of the geomembrane under the condition of two dimensional stress can be obtained accurately.

Description

technical field [0001] The invention relates to the technical field of mechanical performance measurement of materials, in particular to a test method and device for realizing the mechanical performance test of a large-deformation flexible geomembrane under a bidirectional tensile stress state through an internal pressure thin-walled cylinder test. Background technique [0002] Geomembrane is a flexible, impermeable membrane-like polymer anti-seepage material, which is widely used in water conservancy projects. Compared with other anti-seepage materials, the biggest feature of geomembrane is its strong ability to adapt to deformation. Under the condition of uniaxial tensile stress, its elongation rate is generally above 100%, and the maximum can reach 1000%. However, the latest engineering practice and research It shows that the elongation of geomembrane under the condition of two-way tensile stress is small, and it is often far from reaching the elongation rate of the same ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N3/02
Inventor 姜晓桢束一鸣吴海民曹明杰
Owner HOHAI UNIV
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