A fiber pull-out test device based on a press machine

Abstract

The utility model discloses a kind of fiber drawing experimental device based on press, including push assembly, fixed component and test piece;The fixed component is composed of support cylinder, fixed cylinder and support disc;The support cylinder is equipped with groove and fixed cylinder and is assembled;The fixed cylinder below is equipped with connecting protrusion and support cylinder and is assembled, inner wall is equipped with support groove and lifts support disc;The support disc is equipped with guide rail groove, test piece groove and fiber hole 1;The push assembly is composed of pressure disc, guide rail column, fixed disc, fixed ball and nut;The lower end of guide rail column is equipped with bolt;The fixed disc is equipped with bolt hole and fiber hole 2;The fixed ball is equipped with fiber hole 3;The test piece is composed of fiber and matrix;The fiber passes through fiber hole 1, fiber hole 2 and fiber hole 3, knot is fixed;The utility model discloses a kind of device capable of measuring the bonding relationship between fiber and matrix by press, solve the pain point that cannot be tested due to tensile test equipment shortage, have certain application prospect.

Description

Technical Field

[0001] This utility model relates to the field of fiber pulling tests, and in particular to a fiber pulling test device based on a press. Background Technology

[0002] As an important composite material, the macroscopic mechanical properties of fiber-reinforced concrete largely depend on the microscopic mechanical behavior of the fiber-matrix interface. Fiber pull-out testing is a crucial method for studying the bond performance of the fiber-matrix interface. By measuring the load-displacement relationship during fiber pull-out, key parameters such as interfacial shear strength, friction coefficient, and fracture energy can be obtained, providing important evidence for the microscopic mechanism analysis and material design optimization of fiber-reinforced concrete.

[0003] In practical materials mechanical property testing, the tensile strength of brittle materials such as concrete is often tested using indirect methods, such as the Brazilian splitting test. This test applies a compressive load using a press, generating tensile stress within the specimen. Currently, most materials testing laboratories are primarily equipped with universal presses, while dedicated tensile testing equipment is relatively scarce and expensive. This equipment configuration limits the widespread implementation of fiber pull-out tests.

[0004] Therefore, there is an urgent need to develop a device and method that can make full use of existing press equipment to conduct fiber pulling tests, so as to reduce testing costs, improve the convenience and accessibility of the test, and at the same time ensure the accuracy and reliability of the test results. Summary of the Invention

[0005] To achieve the above objectives, this utility model provides the following solution: This utility model provides a fiber pulling test device based on a press, including a pushing component, a fixing component, and a specimen; the fixing component consists of a support cylinder, a fixing cylinder, and a support plate; the support cylinder has a groove for assembly with the fixing cylinder; the fixing cylinder has a connecting protrusion at its lower part for assembly with the support cylinder, and a support groove on its inner wall to support the support plate; the support plate has a guide rail groove, a specimen groove, and fiber holes 1; the pushing component consists of a pressure plate, a guide rail post, a fixing plate, a fixing ball, and a nut; the lower end of the guide rail post has a bolt; the fixing plate has bolt holes and fiber holes 2; the fixing ball has fiber holes 3; the specimen consists of fibers and a matrix; the fibers pass through fiber holes 1, fiber holes 2, and fiber holes 3 and are knotted for fixation.

[0006] Preferably, the pushing component is made of fiber-reinforced composite material, which is lightweight and high-strength, and its weight will not affect the fiber pull-out test during the experiment.

[0007] Preferably, the height of the support cylinder can be prepared according to experimental requirements and can be determined based on the length of the drawn fiber during the experiment.

[0008] Preferably, the diameters of fiber pore 1 and fiber pore 2 are both much larger than the diameter of the fiber used in the fiber pulling experiment, and the diameter of fiber pore 3 is greater than 10% of the diameter of the fiber used in the fiber pulling experiment.

[0009] Preferably, after the fiber passes through the fiber hole 3, it is fixed by knotting the fiber into a knot, and the size of the knot is larger than the diameter of the fiber hole 3.

[0010] Preferably, the overall maximum diameter of the pushing component is smaller than the diameter of the support groove of the support disk.

[0011] The beneficial effects of this utility model are: The fiber pull-out experimental device based on a press provided by this utility model makes full use of the existing universal press equipment in the laboratory, eliminating the need to purchase expensive special tensile testing machines and significantly reducing experimental costs. The precise fit design of the guide column and guide groove ensures linear motion during the pull-out process, avoiding eccentric loads and guaranteeing experimental accuracy. The pushing component is made of lightweight and high-strength fiber-reinforced composite material, with negligible self-weight influence, ensuring the authenticity and reliability of test data. The device has a simple structure and is easy to operate. The optimized design of the fiber pore size avoids improper constraint on the fibers while ensuring effective fixation, making it suitable for fiber materials of different specifications. The standardized structural design ensures the consistency of experimental conditions and the reproducibility of results, while maintaining low maintenance costs and a long service life, providing an economical, feasible, accurate, and reliable experimental method for the study of the microscopic mechanism of fiber-reinforced concrete. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of an overall fiber pulling test apparatus based on a pressure machine.

[0013] Figure 2 This is a schematic diagram of the pushing component of a fiber pulling test device based on a press.

[0014] Figure 3 This is a schematic diagram of a support plate for a fiber pulling test apparatus based on a press.

[0015] Figure 4 This is a schematic diagram of the fixed cylinder of a fiber pulling test apparatus based on a press.

[0016] Figure 5 This is a schematic diagram of the support cylinder of a fiber pulling test apparatus based on a press.

[0017] Figure 6 This is a schematic diagram of a fixed ball in a fiber pulling test apparatus based on a press.

[0018] Figure 7 This is a schematic diagram of a specimen for a fiber pulling test apparatus based on a press.

[0019] In the figure: 1-Pushing component; 11-Pressure plate; 12-Guide post; 13-Fixing plate; 14-Nut; 15-Bolt; 16-Fixing ball; 161-Fiber hole 3; 17-Fiber hole 2; 18-Bolt hole; 2-Fixing component; 21-Support cylinder; 211-Groove; 22-Fixing cylinder; 221-Connecting protrusion; 222-Support groove; 23-Support plate; 231-Guide groove; 232-Specimen groove; 233-Fiber hole 1; 3-Fiber; 4-Matrix; 5-Specimen. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] A fiber pulling test device based on a press includes a pushing component (1), a fixing component (2), and a specimen (5); the fixing component (2) consists of a support cylinder (21), a fixing cylinder (22), and a support plate (23); the support cylinder (21) has a groove (211) for assembly with the fixing cylinder (22); the fixing cylinder (22) has a connecting protrusion (221) at its lower part for assembly with the support cylinder (21), and the inner wall has a support groove (222) to support the support plate (23); the support plate (23) has a guide rail groove (231) and a specimen groove (232). The push assembly (1) consists of a pressure plate (11), a guide post (12), a fixed plate (13), a fixed ball (16), and a nut (14); the guide post (12) has a bolt (15) at its lower end; the fixed plate (13) has a bolt hole (18) and a fiber hole 2 (17); the fixed ball (16) has a fiber hole 3 (161); the specimen consists of a fiber (3) and a matrix (4); the fiber (3) passes through the fiber hole 1 (233), the fiber hole 2 (17), and the fiber hole 3 (161) and is knotted for fixation.

[0022] Reference Figures 1-6This section describes the specific implementation method of a fiber pulling test device based on a press. First, prepare a specimen (5) made of fiber (3) and matrix (4). Pass the fiber (3) through the fiber hole 1 (233) of the support plate (23), place the matrix (4) in the specimen groove (232), and place the support plate (23) with the specimen in it into the support groove (222) of the fixed cylinder (22). Pass the guide post (12) through the guide groove (231), pass the fiber (3) through the fiber hole 2 (17) of the fixed plate (13), and pass the bolt (15) at the lower end of the guide post (12) through the bolt hole (18) and fix it with a nut (14). Pass the fiber (3) through the fiber hole 3 (161) of the fixed ball (16) and straighten the fiber (3). Fix it by knotting the fiber (3) to form a knot. The size of the knot is larger than the diameter of the fiber hole 3 (161). Finally, assemble the connecting protrusion (221) of the fixed cylinder (22) with the groove (211) of the support cylinder (21) to complete the experimental preparation. Place the prepared experimental apparatus on the press and conduct the experiment.

[0023] In this embodiment, the moving distance of the pushing component can be determined by adjusting the distance between the fixed ball and the base. The closer the fixed ball is to the base, the longer the moving distance of the pushing component.

[0024] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and does not limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A fiber pulling test device based on a press, comprising a pushing component, a fixing component, and a specimen; the fixing component consists of a support cylinder, a fixing cylinder, and a support plate; the support cylinder has a groove for assembly with the fixing cylinder; the fixing cylinder has a connecting protrusion at its lower end for assembly with the support cylinder, and a support groove on its inner wall to support the support plate; the support plate has a guide rail groove, a specimen groove, and fiber holes 1; the pushing component consists of a pressure plate, a guide rail post, a fixing plate, a fixing ball, and a nut; the lower end of the guide rail post has a bolt; the fixing plate has bolt holes and fiber holes 2; the fixing ball has fiber holes 3; the specimen consists of fibers and a matrix; the fibers pass through fiber holes 1, fiber holes 2, and fiber holes 3 and are knotted for fixation.

2. The fiber pulling test apparatus based on a press according to claim 1, characterized in that: The propulsion component is made of fiber-reinforced composite material.

3. The fiber pulling test apparatus based on a press according to claim 1, characterized in that: The height of the support cylinder can be determined based on experimental requirements.

4. The fiber pulling test apparatus based on a press according to claim 1, characterized in that: The diameters of fiber pore 1 and fiber pore 2 are both much larger than the diameter of the fiber used in the fiber pulling experiment, and the diameter of fiber pore 3 is 10% larger than the diameter of the fiber used in the fiber pulling experiment.

5. The fiber pulling test apparatus based on a press according to claim 1, characterized in that: After the fiber passes through the fiber hole 3, it is fixed by knotting the fiber into a lump, and the size of the lump is larger than the diameter of the fiber hole 3.

6. The fiber pulling test apparatus based on a press according to claim 1, characterized in that: The maximum diameter of the entire pushing component is smaller than the diameter of the support groove of the support plate.

Images