Tensile device for tensile test of geosynthetics and use method of tensile device
By designing a tensile device for geosynthetic materials, using sliders and drive components to achieve tensile tests under side-limited conditions, the problem of inability to effectively react materials in the prior art is solved, and the test is improved accuracy and applicability.
Patent Information
- Application Number
- CN202411314505.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2024-12-10
AI Technical Summary
The existing tensile test of geosynthetic materials is carried out under no lateral conditions, and the plane strain of the material cannot be effectively reacted, resulting in inaccurate measurement values and uneven clamping of samples with larger specifications during tensile expansion, which affects the test. result.
A stretching device including a platform base, slide rail, slider, locking assembly and drive assembly is designed to clamp the specimen horizontally and longitudinally through the clamping member on the top of the slider, and to achieve side limits using the locking assembly Conditions, the drive assembly controls the specimen to be stretched under the side limit, and the deformation is measured in combination with a laser displacement sensor.
It realizes more accurate measurement of the mechanical properties parameters of materials, reduces errors in unidirectional tensile tests, is suitable for samples of different sizes, and can perform bidirectional lateral tensile tests, improving the accuracy and applicability of the test.
Smart Images
Figure CN119104411A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of tensile testing, in particular to a tensile device for tensile testing of geosynthetics and a use method thereof. Background Art
[0002] From the perspective of effectively enhancing the mechanical properties, durability, strength and fastness of geotextiles and the industrial performance of geotextiles, the tensile process under lateral limit conditions can effectively reflect the real stress of geosynthetics, thereby achieving indicators close to the on-site working characteristics.
[0003] At present, most tests are based on strip tensile tests, which are tensile tests under unconfined conditions. Therefore, they cannot well reflect the actual stress conditions of geotextiles under plane strain conditions, and cannot provide real-time feedback on the strain conditions of geosynthetics. Moreover, when stretching larger specimens, the clamping range is limited, resulting in uneven stretching of the specimens and inaccurate measured values. Summary of the invention
[0004] The technical problem to be solved by the present invention is: in view of the above-mentioned existing problems, a tensile device for geosynthetics tensile test and a method of using the same are provided.
[0005] The technical solution adopted by the present invention is: a tensile device for geosynthetics tensile test, characterized by comprising:
[0006] The platform base has slide rails arranged vertically and horizontally inside, and the specimen for tensile test can be placed in the middle;
[0007] A plurality of sliders are slidably connected to the slide rails, a clamping piece for clamping the sample is provided on the top of the slider, and the plurality of sliders can be enclosed according to the size of the sample, and the horizontal and vertical sides of the sample are clamped and fixed by the clamping piece;
[0008] A locking assembly is provided on the slider, and the locking assembly can lock the sliders on both sides in the horizontal direction or the vertical direction to achieve lateral limitation of the sample;
[0009] The driving components are arranged at intervals along the circumference of the platform base, and the driving components are used to drive the sliding block to move correspondingly along the arrangement direction of the sliding rail.
[0010] Through the above-mentioned technical means, the edge of the sample is clamped and fixed by the clamping piece on the top of the slider. According to the test requirements, the locking assembly is used to lock the horizontal or vertical slider so that the sample is in a lateral limit state. Then the driving assembly is controlled to perform a lateral limit tensile test on the sample, thereby effectively controlling the lateral deformation of the sample during the stretching process, obtaining more accurate material mechanical property parameters, and improving the accuracy of the test.
[0011] In some embodiments, the locking assembly includes a fixed block and a fixed tube. The platform base is fixedly connected to the fixed blocks located on both sides of the slider. The fixed block and the slider are both provided with fixed through holes adapted to the fixed tube. The fixed tube passes through the slider and the fixed blocks on both sides thereof to limit the movement of the slider.
[0012] In some embodiments, a plurality of the fixing through holes are provided on the sliding block at intervals along the moving direction.
[0013] In some embodiments, the driving assembly includes multiple motors and ropes, and the multiple motors are arranged at intervals on the circumference of the platform base, so that a pair of opposing sliders on the slide rail correspond one-to-one to the motors at both ends, and a hook is provided on the side wall of the slider facing the corresponding motor, and the output end of the motor is connected to the hook on the corresponding slider via the rope.
[0014] In some embodiments, a laser displacement sensor is provided on the slider, and the laser displacement sensor can obtain the deformation amount of the sample by measuring the distance between the slider and the corresponding motor.
[0015] In some embodiments, the bottom of the slider is connected to the slide rail via a plurality of pulleys.
[0016] Another technical solution adopted by the present invention is: a method for using a tensile device for geosynthetics tensile testing, characterized in that:
[0017] S1. Prepare geosynthetics samples. The samples are in a square structure and the side length of each sample is determined according to the actual situation.
[0018] S2. Draw marking lines with the same spacing at the center of the specimen so that the clamping position of the clamp coincides with the marking lines, and draw marking points at the center of both sides of the center line of the specimen;
[0019] S3. Prepare at least four sliders in the platform base and move the sliders to appropriate positions;
[0020] According to the actual test requirements, if you want to control the deformation of the sample in the first direction, use the locking assembly to lock the sliders on both sides of the sample in the second direction, and the first direction and the second direction are perpendicular to each other;
[0021] S4. Fix the sample with the clamp on the slide. Keep the height the same so that the sample is parallel to the platform base.
[0022] S5. Start the driving assembly to perform the tensile test until the sample is destroyed, record the change distance of the marking point, and remove the sample.
[0023] In some embodiments, in step S3, fixed blocks fixedly connected to the platform base are provided at both ends of the slider, and the locking assembly fixes the slider by passing a fixed tube through the slider and the fixed through holes in the fixed blocks at both ends.
[0024] In some embodiments, in step S5, a hook is provided on the slider, and the driving component sets a rope connected to the hook at the output end of the motor so that the starting motor can drive the corresponding slider to move.
[0025] The beneficial effects of the present invention are:
[0026] 1. The geosynthetics sample is clamped and fixed by the clamping parts. The slider, rail and drive assembly are used to stretch the sample horizontally or vertically. According to the actual test requirements, the locking assembly is used to lock the slider in any direction to achieve the side limit of the sample. By performing side limit tensile test on the sample, the error caused by necking in the unidirectional tensile test can be reduced, so as to obtain more accurate material mechanical properties parameters, improve the accuracy of the test, and effectively understand the production process of geosynthetics.
[0027] 2. Through the cooperation of the slider and the slide rail, the slider can drive the top clamp to flexibly adjust its position, and the size of the platform base is large, so as to adapt to geosynthetics of different sizes for lateral limit tensile tests. At the same time, when the locking component does not lock the horizontal or vertical slider, the bidirectional lateral tensile test can be completed. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a schematic diagram of the structure of this application.
[0029] Figure 2 It is a structural schematic diagram of the slider in this application.
[0030] Figure 3 This is a schematic diagram of the structure of the slider and the clamping member in this application.
[0031] Description of reference numerals:
[0032] 1. Platform base; 2. Slide rail; 3. Slider; 4. Motor; 5. Specimen; 31. Clamp; 32. Fixed through hole; 33. Hook; 34. Fixed tube; 41. Rope.
[0033] This specification includes references to "one embodiment" or "an embodiment." The appearance of the phrase "in one embodiment" or "in an embodiment" does not necessarily refer to the same embodiment. The particular features, structures or characteristics may be combined in any suitable manner consistent with the present disclosure.
[0034] The term "comprising" is open ended. As used in the appended claims, the term does not exclude additional structures or steps.
[0035] "First," "second," etc. As used herein, these terms act as labels for the nouns that precede them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.). DETAILED DESCRIPTION
[0036] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with specific embodiments.
[0037] Embodiment 1:
[0038] Combination Figures 1 to 3 As shown, this embodiment is a tensile device for geosynthetics tensile test, including a platform base 1, a plurality of sliders 3, a locking assembly and a driving assembly. A channel is provided at the inner bottom of the platform base 1, and a slide rail 2 is laid in the channel. In this embodiment, the slide rail 2 is arranged in a vertical and horizontal manner, and the middle position of the platform base 1 can be placed for the sample 5 for geosynthetics tensile test. A plurality of sliders 3 are slidably connected to the slide rail 2, and a clamping member 31 for clamping the sample 5 is provided on the top of the slider 3. The plurality of sliders 3 enclose the sample 5 according to the size of the sample 5, and the clamping member 31 on the top of the slider 3 is used to clamp and fix the horizontal and vertical sides of the sample 5. The slider 3 is provided with a locking assembly, which can lock the sliders 3 on both sides in the horizontal or vertical direction to achieve the side limit of the sample 5. The driving assembly is arranged at intervals on the peripheral side of the platform base 1, and the driving assembly is used to drive the slider 3 to move correspondingly along the arrangement direction of the slide rail 2.
[0039] Furthermore, the bottom of the slider 3 is connected to the slide rail 2 via a plurality of pulleys. Specifically, four pulleys are provided at the bottom of the slider 3 in this embodiment.
[0040] Furthermore, the clamping ends of the clamping member 31 on the top of the slider 3 are all facing the sample 5 at the center position, and the clamping member 31 is connected to the top of the slider 3 via bolts.
[0041] In some embodiments, the locking assembly includes a fixed block and a fixed tube 34. The platform base 1 is fixedly connected with fixed blocks located on both sides of the slider 3. The fixed block and the slider 3 are both provided with fixed through holes 32. The fixed through holes 32 are adapted to the fixed tube 34. The extension direction of the fixed through holes 32 is perpendicular to the moving direction of the slider 3, so that the fixed tube 34 can pass through the fixed through holes 32 in the slider 3 and the fixed blocks on both sides thereof, thereby utilizing the cooperation between the fixed tube 34 and the fixed block to limit the movement of the slider 3.
[0042] Furthermore, a plurality of fixing through holes 32 are provided at intervals along the moving direction on the slider 3 , and the fixing position of the slider 3 can be adjusted by using the fixing through holes 32 at different positions.
[0043] In some embodiments, the driving assembly includes a plurality of motors 4 and ropes 41, and the plurality of motors 4 are arranged at intervals around the platform base 1, so that a pair of opposing sliders 3 on the slide rail 2 correspond to the motors 4 at both ends, and hooks 33 are provided on the side walls of the sliders 3 facing the corresponding motors 4, and the output ends of the motors 4 are connected to the hooks 33 on the corresponding sliders 3 via ropes 41. Specifically, by controlling the motors 4 to move at a uniform speed or a variable speed, the motors 4 drive the ropes 41 to contract to move the sliders 3.
[0044] Furthermore, a laser displacement sensor is provided on the slider 3 , and the laser displacement sensor can obtain the deformation amount of the sample 5 by measuring the distance between the slider 3 and the corresponding motor 4 , so as to quantitatively determine the deformation of the sample 5 .
[0045] The implementation principle of a tensile device for geosynthetics tensile test according to an embodiment of the present invention is as follows:
[0046] This device is mainly used for tensile testing of geosynthetics, especially for testing the transverse and longitudinal tensile properties of geosynthetics. In this embodiment, since the base size is large and the slider 3 can move freely in the slide rail 2 of the platform base 1, it is convenient to adjust according to the size of the sample 5, and is suitable for geosynthetics samples 5 of different sizes to perform lateral limit tensile tests.
[0047] By conducting a lateral limit tensile test on sample 5 of the geosynthetics, the lateral deformation of sample 5 during the tensile process can be effectively controlled, thereby reducing the error caused by necking of sample 5 in the unidirectional tensile test, obtaining more accurate material mechanical property parameters, and improving the accuracy of the experiment, thereby effectively guiding the production process of geosynthetics.
[0048] The device can not only perform lateral limit tensile test on the sample 5, but also perform bidirectional lateral tensile test on the geosynthetics.
[0049] Embodiment 2:
[0050] This embodiment is a method for using a tensile device for geosynthetics tensile testing, comprising the following steps:
[0051] S1. Prepare a sample 5 of geosynthetics. The sample 5 is in a square structure. The side length of each sample 5 is determined according to actual conditions.
[0052] S1.1. The geosynthetics sample 5 is generally geotextile. The final width of each sample 5 is square, generally (200±1) mm. The width can also be determined according to actual conditions and relevant standards.
[0053] S2. Draw marking lines with the same spacing at the center position of the sample 5 so that the clamping position of the clamping member 31 coincides with the marking lines, and draw marking points at the center positions on both sides of the center line of the sample 5.
[0054] S2.1. Draw two marking lines across the specimen 5 and at the same distance from each other as a mark.
[0055] S3. Prepare at least four sliders 3 in the platform base 1 and move the sliders 3 to appropriate positions.
[0056] According to actual test requirements, if one wants to control the deformation of the sample 5 in the first direction, the locking assembly is used to lock the sliders 3 on both sides of the sample 5 in the second direction, and the first direction and the second direction are perpendicular to each other.
[0057] S3.1. Both ends of the slider 3 are provided with fixing blocks fixedly connected to the platform base 1. The locking assembly fixes the slider 3 by passing the fixing tube 34 through the slider 3 and the fixing through holes 32 in the fixing blocks at both ends.
[0058] S4. Fix the sample 5 using the clamping member 31 on the slider 3. The sample 5 is required to be controlled at the same height so that the sample 5 and the platform base 1 remain parallel.
[0059] S4.1. Clamp the four sides of the sample 5 by the clamping members 31 on the slider 3 in a flat manner, and control the clamping positions of the clamping members 31 on the slider 3 to be at the same height, so that the sample 5 can remain parallel to the platform base 1.
[0060] S5. Start the driving assembly to perform the tensile test until the sample 5 is destroyed, record the change distance of the marking point, and remove the sample 5.
[0061] S5.1. A hook 33 is provided on the slider 3. The driving assembly sets a rope 41 connected to the hook 33 at the output end of the motor 4, so that the starting motor 4 can drive the corresponding slider 3 to move. When the lateral limit tensile test starts and the specimen 5 is destroyed, the change distance of the marking point and related data are recorded.
[0062] The implementation principle of the method for using a tensile device for geosynthetics tensile test according to an embodiment of the present invention is as follows:
[0063] At the beginning of the test, the slider 3 is moved to a suitable position according to the size of the geosynthetics sample 5, and the clamping member 31 on the slider 3 is used to clamp the sample 5 at a position 50 mm near the edge. The rope 41 at the output end of the motor 4 is connected to the hook 33 on the slider 3.
[0064] Start the motor 4, apply a preload of 1% of the expected maximum load to determine the starting point of the initial elongation, and continue to apply the load until the sample 5 breaks. The stretching rate can be adjusted as needed, and is generally recommended to be in the range of 10mm / min to 100mm / min. Stop the test after the sample 5 breaks, record and report the maximum load, and the lateral tensile deformation of the sample 5 can be measured by the linear deformation of the sample 5 on both sides of the center line.
[0065] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A tensile device for geosynthetics tensile testing, characterized in that: include: A platform base (1) is provided with slide rails (2) arranged in a longitudinal and transverse manner, and a specimen (5) for a tensile test can be placed in the middle; A plurality of sliders (3) are all slidably connected to the slide rail (2); a clamping member (31) for clamping the sample (5) is provided on the top of the slider (3); the plurality of sliders (3) can be enclosed according to the size of the sample (5), and the horizontal and vertical sides of the sample (5) are clamped and fixed by the clamping member (31); A locking assembly is arranged on the slider (3), and the locking assembly can lock the slider (3) on both sides in the horizontal direction or the vertical direction to achieve lateral limitation of the sample (5); The driving components are arranged at intervals along the circumference of the platform base (1), and are used to drive the slider (3) to move correspondingly along the arrangement direction of the slide rail (2).
2. A tensile device for geosynthetics tensile testing according to claim 1, characterized in that: The locking assembly comprises a fixed block and a fixed tube (34); the platform base (1) is fixedly connected to the fixed blocks located on both sides of the slider (3); the fixed block and the slider (3) are both provided with fixed through holes (32) adapted to the fixed tube; the fixed tube (34) passes through the slider (3) and the fixed blocks on both sides thereof to limit the movement of the slider (3).
3. A tensile device for geosynthetics tensile testing according to claim 2, characterized in that: The slider (3) is provided with a plurality of fixing through holes (32) at intervals along the moving direction.
4. A tensile device for geosynthetics tensile testing according to claim 1, characterized in that: The driving assembly comprises a plurality of motors (4) and ropes (41), wherein the plurality of motors (4) are arranged at intervals on the peripheral side of the platform base (1), so that a pair of opposing sliders (3) on the slide rail (2) correspond to the motors (4) at both ends respectively, and a hook (33) is provided on the side wall of the slider (3) facing the corresponding motor (4), and the output end of the motor (4) is connected to the hook (33) on the corresponding slider (3) via the rope (41).
5. A tensile device for geosynthetics tensile testing according to claim 4, characterized in that: The slider (3) is provided with a laser displacement sensor, and the laser displacement sensor can obtain the deformation amount of the sample (5) by measuring the distance between the slider (3) and the corresponding motor (4).
6. A tensile device for geosynthetics tensile testing according to claim 1, characterized in that: The bottom of the sliding block (3) is connected to the sliding rail (2) via a plurality of pulleys.
7. A method for using a tensile device for geosynthetics tensile testing according to any one of claims 1 to 6, characterized in that: S1. Prepare a sample (5) of geosynthetics, the sample (5) being in a square structure, and the side length of each sample (5) being determined according to actual conditions; S2. Draw marking lines with the same spacing at the center position of the sample (5) so that the clamping position of the clamping member (31) coincides with the marking lines, and draw marking points at the center positions on both sides of the center line of the sample (5); S3, preparing at least four sliders (3) in the platform base (1), and moving the sliders (3) to appropriate positions; According to actual test requirements, if it is desired to control the deformation of the sample (5) in a first direction, the locking assembly is used to lock the sliders (3) on both sides of the sample (5) in a second direction, and the first direction and the second direction are perpendicular to each other; S4. Fix the sample (5) using the clamping member (31) on the slide block (3). The sample (5) and the platform base (1) are required to be kept at the same height so that the sample (5) and the platform base (1) remain parallel. S5. Start the driving assembly to perform the tensile test until the sample (5) is destroyed, record the change distance of the marking point, and remove the sample (5).
8. The method for using the tensile device for geosynthetics tensile test according to claim 7, characterized in that: In step S3, fixed blocks fixedly connected to the platform base (1) are provided at both ends of the slider (3), and the locking assembly fixes the slider (3) by passing a fixed tube (34) through the slider (3) and the fixed through holes (32) in the fixed blocks at both ends.
9. The method for using the tensile device for geosynthetics tensile test according to claim 7, characterized in that: In step S5, a hook (33) is provided on the slider (3), and the driving component is configured to provide a rope (41) connected to the hook (33) at the output end of the motor (4), so that the starting motor (4) can drive the corresponding slider (3) to move.