Tensile device for tensile test of geosynthetics
By designing a tensile device for geosynthetic materials, accurate tensile tests under side-limited conditions are achieved, and the problem of inaccurate measurement of geotextiles in the prior art under side-limited conditions is solved, which improves the accuracy of the test and the acquisition of material performance parameters.
Patent Information
- Application Number
- CN202422303702.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The existing geobranch tensile tests are difficult to accurately reflect the actual stress under the lateral limit conditions under the lateral limit conditions. Especially, the sample with larger specifications has limited clamping range, resulting in uneven tension, which affects the measurement accuracy.
A tensile device including a platform base, a slide rail, a slider, a locking assembly and a drive assembly is designed. The sample is clamped horizontally or longitudinally through the slide top clamping member, and the side limit is achieved by using the locking assembly, and the drive assembly controls the slide movement for a side limit tensile test.
Effectively control the lateral deformation of the sample during the tensile process, improve the accuracy of the test, obtain more accurate material mechanical properties parameters, and guide the production process of geosynthetic materials.
Smart Images
Figure CN223154657U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of tensile tests, in particular to a tensile device for tensile tests of geosynthetics. Background Technique
[0002] From the perspective of effectively enhancing the mechanical properties, durability, strength and fastness of geotextiles and the industrial properties of geotextiles, the tensile process under lateral confinement conditions can effectively reflect the true stress of geosynthetics, so as to achieve indicators similar 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 true stress of geotextiles under plane strain conditions, and cannot real-time feedback the strain of geosynthetics; and when stretching specimens with larger specifications, due to the limited clamping range, the specimens are stretched unevenly, resulting in inaccurate measured values. Content of the Utility Model
[0004] The technical problem to be solved by the utility model is: aiming at the above problems, to provide a tensile device for tensile tests of geosynthetics.
[0005] The technical solution adopted by the utility model is: a tensile device for tensile tests of geosynthetics, characterized by comprising:
[0006] A platform base, which is internally provided with longitudinally and horizontally arranged slide rails, and a specimen for tensile test can be placed at the middle position;
[0007] A plurality of sliders, all of which are slidably connected to the slide rails. A clamping member for clamping the specimen is arranged at the top of the sliders. The plurality of sliders can enclose according to the size of the specimen, and the clamping member is used to clamp and fix the lateral and longitudinal sides of the specimen;
[0008] A locking assembly is arranged on the slider. The locking assembly can lock the two sliders in the lateral or longitudinal direction to realize lateral confinement of the specimen;
[0009] A driving assembly is arranged at intervals along the periphery of the platform base. The driving assembly is used to drive the slider to move correspondingly along the arrangement direction of the slide rail.
[0010] Through the above technical means, the edge of the specimen is clamped and fixed by the clamping member at the top of the slider. According to the test requirements, the locking component is used to lock the horizontal or vertical slider, so that the specimen is in a lateral confinement condition. Then, the driving component is controlled to conduct a lateral confinement tensile test on the specimen, thereby effectively controlling the lateral deformation of the specimen during the tensile process, being able to obtain more accurate material mechanical property parameters, and improving the accuracy of the test.
[0011] In some embodiments, the locking component includes a fixed block and a fixed tube. The fixed blocks located on both sides of the slider are fixedly connected to the platform base. The fixed block and the slider are both provided with fixed through holes adapted to the fixed tube, and 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 fixed through holes are arranged at intervals on the slider along the moving direction.
[0013] In some embodiments, the driving component includes a plurality of motors and ropes. The plurality of motors are arranged at intervals on the periphery of the platform base, so that a pair of opposite sliders on the slide rail respectively correspond to the motors at both ends. Hooks are provided on the side walls of the sliders facing the corresponding motors, and the output ends of the motors are connected to the hooks on the corresponding sliders through the ropes.
[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 specimen 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 through a plurality of pulleys.
[0016] Another technical solution adopted by the present utility model is: a method for using a tensile device for geosynthetic material tensile test, characterized in that:
[0017] S1. Prepare a specimen of geosynthetic material. The specimen has a square structure, and the side length of each specimen is determined according to the actual situation.
[0018] S2. Draw marking lines with the same spacing at the center position of the specimen, so that the clamping position of the clamping member coincides with the marking lines, and draw marking points at the center positions on both sides of the center line of the specimen respectively.
[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 it is desired to control the deformation of the specimen in the first direction, the locking component is used to lock the sliders on both sides of the specimen in the second direction, where the first direction and the second direction are perpendicular to each other;
[0021] S4. Fix the specimen using the clamping members on the sliders, and it is required to control the same height so that the specimen is parallel to the platform base;
[0022] S5. Start the driving component to conduct a tensile test until the specimen is damaged, record the change distance of the marking points, and remove the specimen.
[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 component fixes the slider by passing a fixed tube through the fixed through holes in the slider and the fixed blocks at both ends.
[0024] In some embodiments, in step S5, hooks are provided on the slider, and the driving component drives the corresponding slider to move by setting a rope connected to the hook at the output end of the motor.
[0025] The beneficial effects of the present utility model are:
[0026] 1. The specimen of the geosynthetic material is clamped and fixed by the clamping members. With the cooperation of the slider, the slide rail and the driving component, the specimen can be stretched horizontally or longitudinally. According to the actual test requirements, the locking component is used to lock the slider in any direction to achieve the lateral confinement of the specimen. By conducting a lateral confinement tensile test on the specimen, the error caused by necking in the unidirectional tensile test can be reduced, so as to obtain more accurate material mechanical property parameters, improve the accuracy of the test, and thus effectively guide the production process of geosynthetic materials.
[0027] 2. Through the cooperation of the slider and the slide rail, the slider can drive the clamping member at the top to flexibly adjust the position, and the size of the platform base is relatively large, so as to adapt to different sizes of geosynthetic materials for lateral confinement tensile tests. At the same time, when the locking component does not lock the sliders in the horizontal or vertical directions, a two-way lateral tensile test can be completed. Description of the Drawings
[0028] Figure 1 is the structural schematic diagram of the present application.
[0029] Figure 2 is the structural schematic diagram of the slider in the present application.
[0030] Figure 3 is the structural schematic diagram of the slider and the clamping member in the present application.
[0031] Explanation of the Reference Numerals in the Drawings:
[0032] 1. Platform base; 2. Slide rail; 3. Slide block; 4. Motor; 5. Specimen; 31. Clamping member; 32. Fixed through hole; 33. Hook; 34. Fixed pipe; 41. Rope.
[0033] This specification includes references to "one embodiment" or "embodiments". The appearance of the phrase "in one embodiment" or "in embodiments" does not necessarily refer to the same embodiment. Specific features, structures, or characteristics may be combined in any suitable manner consistent with the present disclosure.
[0034] "Comprising", this term is open-ended. As used in the appended claims, this term does not exclude additional structures or steps.
[0035] "First", "second", etc. As used herein, these terms serve as labels for the nouns preceding them and do not imply any type of ordering (e.g., spatial, temporal, logical, etc.). Detailed implementation mode
[0036] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the technical solution of the present utility model will be further described below in conjunction with specific embodiments.
[0037] Embodiment 1:
[0038] Combined with Figures 1 to 3 As shown, this embodiment is a tensile device for geosynthetic material tensile tests, including a platform base 1, multiple slide blocks 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. A specimen 5 for geosynthetic material tensile tests can be placed at the middle position of the platform base 1. Multiple slide blocks 3 are slidably connected to the slide rail 2, and a clamping member 31 for clamping the specimen 5 is provided at the top of the slide block 3. Multiple slide blocks 3 enclose the specimen 5 according to the size of the specimen 5, and the clamping member 31 at the top of the slide block 3 is used to clamp and fix the lateral and longitudinal sides of the specimen 5. A locking assembly is provided on the slide block 3, and the locking assembly can lock the two slide blocks 3 on the lateral or longitudinal sides to achieve lateral confinement of the specimen 5. Driving assemblies are arranged at intervals on the periphery of the platform base 1, and the driving assemblies are used to drive the slide blocks 3 to move correspondingly along the arrangement direction of the slide rail 2.
[0039] Furthermore, the bottom of the slide block 3 is connected to the slide rail 2 through multiple pulleys. Specifically, in this embodiment, four pulleys are provided at the bottom of the slide block 3.
[0040] Furthermore, the clamping ends of the clamping members 31 at the top of the slide block 3 all face the specimen 5 at the central position, and the clamping members 31 are connected to the top of the slide block 3 through bolts.
[0041] In some embodiments, the locking assembly includes a fixed block and a fixed tube 34. Fixed blocks are fixedly connected to the platform base 1 on both sides of the slider 3. Both the fixed block and the slider 3 are provided with fixed through holes 32, which are adapted to the fixed tube 34. The extending 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 using the cooperation of the fixed tube 34 and the fixed block to restrict the movement of the slider 3.
[0042] Further, a plurality of fixed through holes 32 are arranged at intervals along the moving direction on the slider 3, and the fixed position of the slider 3 can be adjusted by using the fixed through holes 32 at different positions.
[0043] The fixed blocks on both sides provide support and limit for the middle slider 3. By using the mutual cooperation between the slider 3 and the fixed block, the fixed block provides a rigid structure to resist the displacement that the slider 3 may generate during the test, thereby ensuring that the slider 3 will not have lateral or longitudinal displacement during the test.
[0044] In some embodiments, the driving assembly includes a plurality of motors 4 and ropes 41. The plurality of motors 4 are arranged at intervals on the periphery of the platform base 1, so that a pair of opposite sliders 3 on the slide rail 2 and the motors 4 at both ends correspond to each other respectively. 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 through the ropes 41. Specifically, by controlling the motors 4 in a uniform or variable speed manner, the motors 4 drive the ropes 41 to contract to move the slider 3.
[0045] Further, a laser displacement sensor is provided on the slider 3. The laser displacement sensor can obtain the deformation amount of the specimen 5 by measuring the distance between the slider 3 and the corresponding motor 4, so as to quantitatively judge the deformation of the specimen 5.
[0046] The implementation principle of a tensile device for geosynthetic tensile tests according to an embodiment of the present invention is as follows:
[0047] This device is mainly aimed at the tensile test of geosynthetic materials, especially for testing the lateral and longitudinal tensile properties of geosynthetic materials. In this embodiment, due to the large size of the base, 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 specimen 5, and it is applicable to conduct confined tensile tests on geosynthetic specimens 5 of different sizes.
[0048] By conducting a confined tensile test on the specimen 5 of the geosynthetic material, the lateral deformation of the specimen 5 during the tensile process can be effectively controlled, thereby reducing the error caused by necking in the unidirectional tensile test of the specimen 5, obtaining more accurate material mechanical property parameters, improving the accuracy of the experiment, and thus effectively guiding the production process of geosynthetic materials.
[0049] This device can not only conduct unconfined tensile tests on the specimen 5, but also conduct bidirectional lateral tensile tests on geosynthetics.
[0050] Example Two:
[0051] This example is a method for using a tensile device for geosynthetic tensile tests, including the following steps:
[0052] S1. Prepare the specimen 5 of geosynthetics. The specimen 5 has a square structure, and the side length of each specimen 5 is determined according to the actual situation.
[0053] S1.1. The specimen 5 of geosynthetics is generally mainly geotextile. The final width of each specimen 5 is mainly square, generally (200 ± 1) mm, and the width can also be determined according to the actual situation and relevant standards.
[0054] S2. Draw marking lines with the same spacing at the center position of the specimen 5, so that the clamping positions of the clamping members 31 coincide with the marking lines, and draw marking points at the center positions on both sides of the center line of the specimen 5.
[0055] S2.1. Draw two marking lines across the specimen 5 and at the same distance apart on the specimen 5 for marking.
[0056] S3. Prepare at least four sliders 3 in the platform base 1, and move the sliders 3 to appropriate positions.
[0057] According to the actual test requirements, if it is desired to control the deformation of the specimen 5 in the first direction, the locking assembly is used to lock the sliders 3 on both sides of the specimen 5 in the second direction, and the first direction and the second direction are perpendicular to each other.
[0058] S3.1. 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 the fixed tube 34 through the fixed through holes 32 in the slider 3 and the fixed blocks at both ends.
[0059] S4. Fix the specimen 5 with the clamping members 31 on the slider 3, and it is required to control the same height so that the specimen 5 is parallel to the platform base 1.
[0060] S4.1. Clamp the four sides of the specimen 5 with the clamping members 31 on the slider 3 in a tiled manner, and control the clamping positions of the clamping members 31 on the slider 3 at the same height, so that the specimen 5 can be parallel to the platform base 1.
[0061] S5. Start the driving assembly to conduct a tensile test until the specimen 5 is damaged, record the change distance of the marking points, and remove the specimen 5.
[0062] S5.1. A hook 33 is provided on the slider 3. The driving component is provided with a rope 41 connected to the hook 33 at the output end of the motor 4, so that starting the motor 4 can drive the corresponding slider 3 to move. When the side-limited tensile test starts and the specimen 5 is damaged, record the change distance of the marking point and related data.
[0063] The implementation principle of the usage method of a tensile device for geosynthetic tensile tests in an embodiment of the present utility model is as follows:
[0064] When starting the test, according to the size of the geosynthetic specimen 5, move the slider 3 to a suitable position, and use the clamping member 31 on the slider 3 to clamp the specimen 5 at a position 50 mm away from the edge around the specimen 5. Connect the rope 41 at the output end of the motor 4 to the hook 33 on the slider 3.
[0065] Start the motor 4, apply a preload of 1% of the expected maximum load to determine the starting point of the initial elongation rate, and continue to apply the load until the specimen 5 breaks. Among them, the tensile rate can be adjusted as needed. Generally, it is recommended to be in the range of 10 mm / min to 100 mm / min. Stop the test after the specimen 5 breaks, record and report the maximum load. The side-limited tensile deformation of the specimen 5 can be measured by measuring the linear deformation of the specimen 5 on both sides of the center line.
[0066] The above are all preferred embodiments of the present utility model. The protection scope of the present utility model is not limited hereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present utility model should be covered within the protection scope of the present utility model.
Claims
1. A tensile device for the tensile test of geosynthetics, characterized in that Comprising: A platform base (1) with a vertically and horizontally arranged slide rail (2) inside, and a specimen (5) for tensile testing can be placed at the middle position; A plurality of sliders (3), all slidably connected to the slide rail (2), a clamping member (31) for clamping the specimen (5) is provided at the top of the slider (3), and the plurality of sliders (3) can enclose according to the size of the specimen (5), and the clamping member (31) is used to clamp and fix the lateral and longitudinal sides of the specimen (5); A locking assembly, provided on the slider (3), the locking assembly can lock the sliders (3) on both sides in the horizontal or vertical direction to achieve lateral confinement of the specimen (5); A driving assembly, arranged at intervals along the periphery of the platform base (1), the driving assembly is used to drive the slider (3) to move correspondingly along the arrangement direction of the slide rail (2).
2. The tensile device for the tensile test of geosynthetics according to claim 1, wherein: The locking assembly includes a fixed block and a fixed tube (34), the platform base (1) is fixedly connected with 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, and 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. The tensile device for geosynthetic material tensile test according to claim 2, characterized in that: A plurality of the fixed through holes (32) are arranged at intervals on the slider (3) along the moving direction.
4. A tensile device for geosynthetic tensile test according to claim 1, characterized in that: The driving assembly includes a plurality of motors (4) and ropes (41), the plurality of motors (4) are arranged at intervals on the periphery of the platform base (1), so that a pair of opposite sliders (3) on the slide rail (2) and the motors (4) at both ends correspond to each other respectively, 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) through the rope (41).
5. A tensile device for geosynthetic tensile tests according to claim 4, characterized in that: A laser displacement sensor is provided on the slider (3), and the laser displacement sensor can obtain the deformation amount of the specimen (5) by measuring the distance between the slider (3) and the corresponding motor (4).
6. The tensile device for geosynthetic tensile test according to claim 1, characterized in that: The bottom of the slider (3) is connected to the slide rail (2) through a plurality of pulleys.