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Creep test device and test method thereof

A testing device and creep technology, applied in measuring devices, applying stable tension/pressure to test material strength, instruments, etc., can solve problems such as difficulty in maintaining constant pressure, low precision of tensile displacement, waste of manpower and energy, etc. , to achieve the effect of small fluctuation, stable load and increased contact area

Inactive Publication Date: 2012-07-18
SHANDONG UNIV
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Problems solved by technology

[0003] At present, the creep test devices used by research institutes of major universities in China are difficult to maintain a constant pressure or the pressure fluctuates too much during the pressure holding process, and the measurement accuracy of the tensile displacement is not high. In addition, the creep test is time-consuming Long, easy to cause a large waste of manpower and energy

Method used

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  • Creep test device and test method thereof
  • Creep test device and test method thereof
  • Creep test device and test method thereof

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Such as figure 1 , 2 As shown, a creep test device includes a test bench with a tetrapod 1 structure, and the four legs of the tetrapod 1 are connected by beams. A fixing system 4 for fixing the geogrid test sample 6 is arranged on the lower side of the top of the test bench, a vernier caliper 2 with a watch is arranged on the fixing system 4, and a loading device is connected to the lower part of the fixing system 4. The fixing system 4 includes two sets of upper and lower relative upper and lower clamps 11, 12 connected by screws 7, on the corresponding surfaces of the two relative upper and lower clamps, wherein the lower surface of the upper clamp 11 is provided with two protrusions, The upper surface of the lower fixture 12 is provided with two grooves corresponding to the protrusions.

[0033] The two measuring claws 10 of the vernier ca...

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Abstract

The invention discloses a creep test device, which comprises a test bed frame. The lower side of the top portion of the test bed frame is provided with a fixing system for fixing a test sample. The fixing system is provided with a vernier caliper with a meter, and the lower portion of the fixing system is connected with a loading device. A test method utilizing the test device is further disclosed. The creep test device is simple to operate, easy to achieve and low in cost, maintains constant pressure by controlling weight of weights, utilizes the vernier capliper with the meter to ensure the progress of displacement measurement, and has the advantages of being intuitive, simple, easy to maintain and the like.

Description

technical field [0001] The invention relates to a test device and method, in particular to a creep test device and a test method for performance testing of geogrid materials. Background technique [0002] Creep refers to the phenomenon that the strain of a solid material increases with time under the condition of keeping the stress constant. Plastic deformation usually occurs after the stress exceeds the elastic limit, while creep can also occur when the stress is less than the elastic limit, as long as the stress is applied for a long time. With the continuous development of geosynthetics, geogrids are increasingly widely used in permanent engineering. Due to long-term loading, the geogrid in the geotechnical building will have a large deformation, which will greatly weaken the reinforcing function of the geotextile and cause the building to lose its stability. Therefore, in order for geogrids to perform their functions under long-term loading, their creep characteristics...

Claims

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Application Information

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IPC IPC(8): G01N3/14G01N3/04
Inventor 李华銮胡聪张骞李术才李利平王庆瀚郭明张乾青田野
Owner SHANDONG UNIV
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