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Sampling device and sampling method of geosynthetics biaxial tensile test

A technology of geosynthetics and biaxial stretching, which is applied in the direction of measuring devices, analysis materials, and preparation of test samples. Destruction in advance, improving the efficiency of sample preparation, and the effect of completely consistent shape and size

Inactive Publication Date: 2018-10-12
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: The present invention provides a sample preparation device for biaxial tensile test of geosynthetics, which solves the problems of large randomness, low precision, easy defects, large deviation, and low sample preparation efficiency in the existing manual sample preparation

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  • Sampling device and sampling method of geosynthetics biaxial tensile test
  • Sampling device and sampling method of geosynthetics biaxial tensile test

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Such as Figure 1-4 As shown, the sample preparation device for bidirectional tensile test of geosynthetics includes: a punching machine 1 with a punch 2 and a punching platform 5, a loading plate 3 installed and fixed under the punch 2, a punching machine installed and fixed under the loading plate 3 The plate 4, the base plate 6 installed and fixed on the stamping platform 5, and the mold 7 placed between the stamping plate 4 and the base plate 6 during sample preparation.

[0023] The loading plate 3 is a square steel plate with a thickness of 1 cm and 30 cm × 30 cm. The loading plate is a square rigid plate. It is fixed on the lower surface of the punch 2 of the punching machine 1 through a large bolt 14 at its center, and its function is to transmit vertical punching. While loading, increase the application range of the stamping load so that it can be even...

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Abstract

The invention discloses a sampling device of geosynthetics biaxial tensile test. The sampling device comprises a punching machine main body with a punch and a punching platform, wherein the lower partof the punch is detachably connected with a loading plate and a punching plate; a bottom plate is arranged on the punching platform; a mould is placed on the bottom plate; the mould comprises a mouldbottom plate; cutter blades matched with the shapes of test samples are detachably arranged on the mould bottom plate. According to the sampling device of geosynthetics biaxial tensile test, any testsamples which are in complicated shapes can be accurately, quickly and effectively manufactured, and the applicable material range is wide. By utilizing a punching principle, once-forming is realized, and under the premise of ensuring the precision of the shapes and the sizes of the test samples, outlines of the test samples are ordered and smooth without any gaps or rough selvedge.

Description

technical field [0001] The invention relates to a sample preparation device and a method, in particular to a sample preparation device and a sample preparation method for a bidirectional tensile test of a geosynthetic material. Background technique [0002] Geosynthetics such as geomembranes, geotextiles, and composite geomembranes are mostly flexible polymer materials with a planar structure. When they are located inside or on the surface of a structure, they are mostly in a state of plane stress, and their principal stress is a state of bidirectional tensile stress. A large number of engineering practices and scientific research have shown that compared with the state of uniaxial tension, the mechanical property parameters such as elongation, strength and modulus of geosynthetics under biaxial tension are quite different, so it is necessary to adopt a method closer to engineering The two-way tensile test method of the actual stress state is used to test its mechanical prop...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 吴海民张振束一鸣周天娥
Owner HOHAI UNIV
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