CN219737057U - Clamp for fiber reinforced cement-based material tensile test - Google Patents
Clamp for fiber reinforced cement-based material tensile test Download PDFInfo
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- CN219737057U CN219737057U CN202320890993.9U CN202320890993U CN219737057U CN 219737057 U CN219737057 U CN 219737057U CN 202320890993 U CN202320890993 U CN 202320890993U CN 219737057 U CN219737057 U CN 219737057U
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- clamp
- clamp body
- tensile testing
- based material
- connecting portion
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- 239000000463 material Substances 0.000 title claims abstract description 34
- 238000009864 tensile test Methods 0.000 title claims abstract description 34
- 239000004568 cement Substances 0.000 title claims abstract description 32
- 239000000835 fiber Substances 0.000 title claims abstract description 29
- 238000012360 testing method Methods 0.000 claims abstract description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000004035 construction material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to the technical field of tensile test tools, in particular to a clamp for tensile test of fiber reinforced cement-based materials, which comprises the following components: the clamp comprises a clamp body and a connecting part, wherein a polygonal hole matched with the end part of the sample is formed in the clamp body, a notch communicated with the polygonal hole and used for the sample to extend is formed in one side of the clamp body, the connecting part is fixed on the opposite side face of the clamp body to the notch, the connecting part, the notch and the sample are located on the same straight line, the number of edges of the polygonal hole is at least five, and the connecting part is used for connecting a tensile force testing machine. The clamp for the fiber reinforced cement-based material tensile test is suitable for the tensile of the fiber reinforced cement-based material, is not easy to cause the slipping of the clamp in the test process, has more stable experimental data, high precision, high working efficiency and more convenient use.
Description
Technical Field
The utility model relates to the technical field of tensile test tools, in particular to a clamp for tensile test of fiber reinforced cement-based materials.
Background
Fiber-reinforced cement-based composite materials have been widely used in various fields of civil engineering as novel construction materials. The composite material has the characteristics of each component, can exert the characteristics of various materials to the maximum extent, and has higher performances of tensile strength, fracture resistance, toughness, permeability resistance, crack resistance, durability, fatigue resistance and the like compared with the common cement material. However, the method of characterizing the properties of composite materials also has problems, in particular the tensile properties.
Under the general condition, the tensile sample is mainly tested by adopting dumbbell-shaped sample bars or strip-shaped sample bars, and the clamping end part of the sample is clamped with secondary stress due to the specificity of the fiber-reinforced cement-based sample bars, so that the tensile property of the material cannot be truly reflected.
Disclosure of Invention
The utility model provides a clamp for tensile test of fiber cement-based materials, which aims to improve the following technical problems:
the common clamp is not suitable for stretching of fiber reinforced cement-based materials, and is easy to cause slipping of the clamp in the test process, unstable in experimental data, poor in precision, low in working efficiency and inconvenient to use.
The utility model provides a clamp for tensile test of fiber reinforced cement-based materials, which adopts the following technical scheme:
a fixture for tensile testing of a fiber cement-based material for assisting a specimen whose end portion is processed into a regular polygon structure to be subjected to tensile testing, the fixture for tensile testing of a fiber cement-based material comprising: the clamp comprises a clamp body and a connecting portion, wherein a polygonal hole matched with the end part of the sample is formed in the clamp body, a notch communicated with the polygonal hole and used for the sample to extend is formed in one side of the clamp body, the connecting portion is fixed on the opposite side face of the clamp body to the notch, the connecting portion, the notch and the sample are located on the same straight line, and at least five sides of the polygonal hole are arranged, and the connecting portion is used for connecting a tensile force testing machine.
In one possible technical scheme of the utility model, the straight line where the connecting part, the notch and the sample are located passes through the central axis of the clamp body.
In one possible technical scheme of the utility model, the polygonal holes are regular hexagonal holes, and the end parts of the samples are arranged into regular hexagonal blocks.
In one technical scheme of the utility model, the periphery of the clamp body is of a regular hexagonal structure concentric with the regular hexagonal holes, and the sides of the regular hexagonal structure are in one-to-one correspondence with the sides of the regular hexagonal holes and are arranged in parallel.
In one possible technical solution of the present utility model, the side length L of the regular hexagonal hole is 40-60 mm.
In one possible technical solution of the present utility model, the thickness of the clamp body is 15-25 mm.
In one possible technical solution of the present utility model, the width D of the clamp body is 15-25 mm.
In one technical scheme of the utility model, one end of the connecting part is provided with a threaded rod, the side surface of the clamp body, which is far away from the notch, is provided with a threaded hole, the threaded rod is assembled in the threaded hole in a threaded manner, and a locking piece which is abutted against the threaded rod is assembled on the clamp body in a threaded manner.
In one possible technical solution of the present utility model, the connecting portion is provided with a pin hole for connection.
In one possible technical solution of the present utility model, the clamp body and the connecting portion are made of stainless steel materials, and the tensile strength is greater than or equal to 150MPa.
In summary, the present utility model includes at least one of the following beneficial technical effects:
on the basis that the regular polygon structure is processed at the end part of the sample, through the regular polygon hole which is matched with the regular polygon structure on the clamp body, the tensile test can be directly carried out through the clamp by simply clamping the regular polygon structure into the regular polygon hole during the test, the problems of secondary stress, sample slipping and the like in the tensile process of the fiber reinforced cement-based material are effectively solved, the structure is simple, the operation is convenient, and the stability and the accuracy of the experimental result are high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a fixture for fiber cement-based material tensile testing according to an embodiment of the present utility model.
Fig. 2 is a schematic view showing the use state of the clamp for fiber cement-based material tensile test in the embodiment of the present utility model.
Reference numerals illustrate:
100. a sample; 200. A regular polygon structure;
1. a clamp body; 11. Polygonal holes; 12. A notch;
2. a connection part; 21. A threaded rod; 22. A pin hole;
3. a locking piece.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The utility model is described in further detail below with reference to fig. 1-2.
The embodiment of the utility model discloses a clamp for a fiber reinforced cement-based material tensile test. Referring to fig. 1 and 2, a clamp for fiber cement-based material tensile test for assisting a tensile test of a specimen 100 whose end is processed into a regular polygon structure 200, the clamp for fiber cement-based material tensile test comprising: the clamp comprises a clamp body 1 and a connecting portion 2, wherein a polygonal hole 11 matched with the end portion of a sample 100 is formed in the clamp body 1, a notch 12 communicated with the polygonal hole 11 and used for the sample 100 to extend is formed in one side of the clamp body 1, the connecting portion 2 is fixed on the opposite side face of the clamp body 1 and the notch 12, the connecting portion 2, the notch 12 and the sample 100 are located on the same straight line, at least five sides of the polygonal hole 11 are arranged, and the connecting portion 2 is used for connecting a tensile testing machine.
The clamp for the fiber reinforced cement-based material tensile test has the following beneficial technical effects:
on the basis that the regular polygon structure 200 is processed at the end part of the sample 100, through the regular polygon hole 11 which is matched with the regular polygon structure 200 is formed in the clamp body 1, the tensile test can be directly carried out through the clamp by simply clamping the regular polygon structure 200 into the regular polygon hole 11 during the test, the problems of secondary stress, sample 100 slipping and the like in the tensile process of the fiber reinforced cement-based material are effectively solved, the structure is simple, the operation is convenient, and the stability and the accuracy of experimental results are high.
In this embodiment, in order to make the tensile test more stable, the straight line where the connecting portion 2, the notch 12 and the sample 100 are located passes through the central axis of the fixture body 1.
In order to enhance structural firmness of the fixture body 1, since the hexagon has stronger deformation resistance and firmness, the polygonal hole 11 is a regular hexagonal hole, and the end of the sample 100 is provided in a regular hexagonal block shape.
In this embodiment, the circumferential side of the fixture body 1 is a regular hexagonal structure concentric with the regular hexagonal hole, and the sides of the regular hexagonal structure are in one-to-one correspondence with and parallel to the sides of the regular hexagonal hole.
Specifically, the side length L of the regular hexagonal hole is 40-60 mm (in this embodiment, the side length L is preferably 50 mm), the thickness of the jig body 1 is 15-25 mm (in this embodiment, the thickness is preferably 20 mm), and the width D of the jig body 1 is 15-25 mm (in this embodiment, the width D is preferably 20 mm).
In this embodiment, for convenient assembly and replacement of the connection portion 2, one end of the connection portion 2 is provided with a threaded rod 21, a side surface of the fixture body 1 away from the notch 12 is provided with a threaded hole, the threaded rod 21 is screwed into the threaded hole, the fixture body 1 is screwed with a locking member 3 which abuts against the threaded rod 21, and the locking member 3 can be a machine screw or a common screw.
In this embodiment, in order to facilitate connection of the connection portion 2 with the tensile tester, a pin hole 22 for connection is provided on the connection portion 2, and the pin hole 22 may be used for inserting a plug pin to achieve the purpose of quick connection.
Specifically, in order to enhance the firmness and service life of the clamp body 1 and the connecting portion 2, the clamp body 1 and the connecting portion 2 are both made of stainless steel materials and have tensile strengths of 150MPa or more.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The fixture for tensile testing of a fiber cement-based material is characterized in that the fixture for tensile testing of a specimen (100) for assisting end processing into a regular polygon structure (200) comprises: the clamp comprises a clamp body (1) and a connecting portion (2), wherein polygonal holes (11) matched with the end portions of the samples (100) are formed in the clamp body (1), one side of the clamp body (1) is provided with notches (12) which are communicated with the polygonal holes (11) and are used for the samples (100) to stretch out, the connecting portion (2) is fixed on the side faces, opposite to the notches (12), of the clamp body (1), the connecting portion (2) and the notches (12) are located on the same straight line with the samples (100), and the edges of the polygonal holes (11) are at least five, and the connecting portion (2) is used for connecting a tensile force testing machine.
2. The clamp for tensile testing of fiber cement-based materials according to claim 1, wherein a straight line where the connecting portion (2), the notch (12) and the specimen (100) are located passes through a central axis of the clamp body (1).
3. The fixture for fiber cement-based material tensile testing according to claim 1, wherein the polygonal hole (11) is a regular hexagonal hole, and the end of the specimen (100) is provided in a regular hexagonal block shape.
4. A fixture for tensile testing of a fiber cement-based material according to claim 3, characterized in that the circumferential side of the fixture body (1) is a regular hexagonal structure concentric with the regular hexagonal holes, and the sides of the regular hexagonal structure are arranged in one-to-one correspondence and parallel to the sides of the regular hexagonal holes.
5. The fixture for tensile testing of a fiber cement-based material of claim 4, wherein the regular hexagonal holes have a side length L of 40-60 mm.
6. The clamp for tensile testing of fiber cement-based materials according to claim 5, wherein the thickness of the clamp body (1) is 15-25 mm.
7. The clamp for tensile testing of fiber cement-based materials according to claim 5, wherein the width D of the clamp body (1) is 15-25 mm.
8. The clamp for fiber reinforced cement-based material tensile testing according to claim 1, wherein one end of the connecting portion (2) is provided with a threaded rod (21), a side surface of the clamp body (1) away from the notch (12) is provided with a threaded hole, the threaded rod (21) is threadedly assembled in the threaded hole, and a locking member (3) which abuts against the threaded rod (21) is threadedly assembled on the clamp body (1).
9. The clamp for tensile testing of fiber cement-based materials according to claim 1, wherein a pin hole (22) for connection is provided on the connection portion (2).
10. The clamp for tensile testing of a fiber cement-based material according to claim 1, wherein the clamp body (1) and the connecting portion (2) are both made of stainless steel and have tensile strength of 150MPa or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320890993.9U CN219737057U (en) | 2023-04-19 | 2023-04-19 | Clamp for fiber reinforced cement-based material tensile test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320890993.9U CN219737057U (en) | 2023-04-19 | 2023-04-19 | Clamp for fiber reinforced cement-based material tensile test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219737057U true CN219737057U (en) | 2023-09-22 |
Family
ID=88059319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320890993.9U Active CN219737057U (en) | 2023-04-19 | 2023-04-19 | Clamp for fiber reinforced cement-based material tensile test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219737057U (en) |
-
2023
- 2023-04-19 CN CN202320890993.9U patent/CN219737057U/en active Active
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