A device for testing the tensile properties of wide strips of geosynthetics and its measuring method
A technology of geosynthetic materials and tensile properties, applied in measuring devices, using stable tension/pressure to test the strength of materials, analyzing materials, etc. The effect of improving the accuracy of the measurement
Active Publication Date: 2021-07-09
北京筑之杰建筑工程检测有限责任公司
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[0003] The current tensile test is carried out by clamping a wide strip sample with a universal testing machine, and then measuring it by tracking two marked points on the sample with an extensometer. Due to the small size of the chuck, the existing extensometer When clamping and measuring a sample with a larger size, it can only be clamped at the edge of the wide strip sample, and in the process of stretching, the deformation at the edge of the wide strip is relatively large, which leads to the measured The value is less accurate
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[0043] refer to figure 1 , which is a device for detecting the tensile properties of wide strips of geosynthetics disclosed in the present invention, comprising a universal testing machine 1, a jaw 2 installed on the universal testing machine 1, and an extensometer fixed on the workbench of the universal testing machine 1 Bracket 3, and a pair of clamping assemblies 4 mounted on the extensometer bracket 3, wherein the jaws 2 correspond to the fixing seats 11 on the universal testing machine 1 and are respectively provided with an upper jaw and a lower jaw, both of which have the same structure , are used to clamp both sides of the wide strip sample 6 respectively.
[0044] refer to figure 2 , the jaw 2 includes a fixed plate 21, a vertical plate 22, and a pole 23 welded between the fixed plate 21 and the vertical plate 22 and near the two ends, and a wide strip sample is formed between the fixed plate 21 and the vertical plate 22 6 through the gap, the upper surface of the fi...
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The invention relates to a device for testing the tensile properties of wide strips of geosynthetics, which comprises a universal testing machine, a jaw installed on the universal testing machine, an extensometer bracket fixed on the working table of the universal testing machine, and a pair of extensometers installed on the extensometer. clamping assembly on the gauge bracket. The present invention also relates to a measuring method for detecting the tensile properties of wide strips of geosynthetics, comprising the following measuring steps: S1: preparing wide strip samples; S2: marking; S3: installing jaws; S4: installing clamping components; S5: Adjust the clamping assembly to form an insertion gap between the fixed rod and the clamping rod; S6: Pass the wide strip sample through the gap between the upper jaw, the clamping assembly, and the lower jaw from top to bottom, and Clamp and fix the wide-strip sample; S7: Start the universal testing machine to stretch until the wide-strip sample is destroyed, and record the reading. The invention has the advantage that it is suitable for wide-strip samples with larger specifications, and can improve the accuracy of values obtained by workers in the wide-strip tensile test.
Description
technical field [0001] The invention relates to the technical field of wide strip tensile testing equipment, in particular to a device for testing the wide strip tensile performance of geosynthetics and a measuring method thereof. Background technique [0002] The wide-strip tensile test is mainly used to detect the tensile strength of various wide-strip samples in order to provide engineering indicators that are closer to the expected on-site working characteristics of geosynthetics. [0003] The current tensile test is carried out by clamping a wide strip sample with a universal testing machine, and then measuring it by tracking two marked points on the sample with an extensometer. Due to the small size of the chuck, the existing extensometer When clamping and measuring a sample with a larger size, it can only be clamped at the edge of the wide strip sample, and in the process of stretching, the deformation at the edge of the wide strip is relatively large, which leads to ...
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IPC IPC(8): G01N3/04G01N3/08
Inventor 高原野杨柳刘继伟
Owner 北京筑之杰建筑工程检测有限责任公司