Clamping device for R-region strength test of composite material
By designing the strength test clamping device of composite material R zone, the layered failure problem of composite material laminate R zone when loaded is solved, and stable clamping and effective connection of test pieces are achieved, ensuring the smooth progress of testing.
Patent Information
- Application Number
- CN202422222138.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-11
AI Technical Summary
In the prior art, the R region of the composite laminate is prone to occur out-of-plane loads and layered failures when loaded, and it is difficult to effectively fix the test piece and connect it to the test machine.
A composite R-zone strength test clamping device is designed, including a first hinge assembly and a second clamping assembly. It is docked with the tensile tester through the hinge to clamp the R-zone end of the test piece, eliminates assembly stress, adapts to dimensional errors, and ensures that the test is carried out smoothly.
The stable clamping of composite R-zone test pieces is achieved, which eliminates assembly stress and adapts to certain dimensional errors, ensures effective docking with the test machine, and ensures smooth progress of the test.
Smart Images
Figure CN223078047U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of materials, in particular to a clamping device for testing the strength of the R area of a composite material. Background Art
[0002] Under in-plane tensile, compressive or shear loads, laminates made of composite materials have good mechanical properties. However, the interlaminar properties of composite laminates are poor, and "delamination" failure is likely to occur when subjected to out-of-plane tensile or shear loads. Therefore, out-of-plane loads should be avoided as much as possible in the design of composite structures.
[0003] However, due to the special structure of laminates made of composite materials, out-of-plane loads inevitably occur in the R area between the web and flange of composite beams and ribs when loaded. Therefore, tensile tests need to be carried out on the R area of test pieces made of composite materials to study and determine the failure mode and failure load of the R area. In the prior art, test pieces with an R area are not convenient to fix and cannot be effectively connected to a testing machine.
[0004] Therefore, a clamping device for testing the strength of the R area of a composite material is needed to solve the above problems. Summary of the Utility Model
[0005] The purpose of the utility model is to provide a clamping device for testing the strength of the R area of a composite material, which can effectively fix the test piece and can be effectively docked with a testing machine to ensure the smooth progress of the test.
[0006] To achieve this purpose, the utility model adopts the following technical solutions:
[0007] A clamping device for testing the strength of the R area of a composite material, comprising:
[0008] A first hinge assembly for docking with a tensile testing machine;
[0009] A first clamping assembly, the first clamping assembly is hinged to the first hinge assembly and is used for clamping one end of the R area of the test piece;
[0010] A second clamping assembly, the second clamping assembly is used for clamping the other end of the R area of the test piece;
[0011] A second hinge assembly for docking with a tensile testing machine, the second hinge assembly is hinged to one end of the second clamping assembly away from the first clamping assembly.
[0012] Further, the first hinge assembly includes a first rotating shaft and a first hinge member, the first rotating shaft is arranged on the first hinge member and the first clamping assembly, and the first hinge member is used for docking with the tensile testing machine.
[0013] Further, a first mounting hole is formed at one end of the first hinge member away from the first clamping assembly.
[0014] Further, the first clamping assembly includes a first support plate, a first pressing plate and a first fastener. The first support plate is rotatably connected to the first hinge member through the first rotating shaft. The first support plate has a first inclined surface. One end of the R region of the test piece can be clamped between the first inclined surface and the first pressing plate. The first fastener is arranged on the first support plate and the first pressing plate.
[0015] Further, a first connection hole is formed on the first support plate, a second connection hole opposite to the first connection hole is formed on the first pressing plate, and the first fastener passes through the first connection hole and the second connection hole.
[0016] Further, the second clamping assembly includes a second support plate, a second pressing plate and a second fastener. The second support plate has a second inclined surface. The other end of the R region of the test piece can be clamped between the second inclined surface and the second pressing plate. The second fastener is arranged on the second support plate and the second pressing plate.
[0017] Further, a third connection hole is formed on the second support plate, a fourth connection hole opposite to the third connection hole is formed on the second pressing plate, and the second fastener passes through the third connection hole and the fourth connection hole.
[0018] Further, the third connection hole is a strip-shaped hole, and the third connection hole extends along the inclination direction of the second inclined surface.
[0019] Further, the second hinge assembly includes a second rotating shaft and a second hinge member. The second rotating shaft passes through the second hinge member and the second clamping assembly. The second hinge member is used for docking with the tensile testing machine.
[0020] Further, a second mounting hole is formed at one end of the second hinge member away from the second clamping assembly.
[0021] The beneficial effects of the utility model:
[0022] A clamping device for testing the strength of the R region of a composite material provided by the present utility model. The first hinged assembly is used to dock with a tensile testing machine. The first clamping assembly is hinged to the first hinged assembly and is used to clamp one end of the R region of the test piece. The second clamping assembly is used to clamp the other end of the R region of the test piece. The second hinged assembly is used to dock with the tensile testing machine, and the second hinged assembly is hinged to one end of the second clamping assembly away from the first clamping assembly. Through the above settings, the test piece is clamped between the first clamping assembly and the second clamping assembly, which is convenient for fixing the test piece. By docking the first hinged assembly and the second hinged assembly with the tensile testing machine, since the first hinged assembly is hinged to the first clamping assembly and the second hinged assembly is hinged to the second clamping assembly, the assembly stress after installing the test piece can be eliminated, and at the same time, a certain dimensional error can be adapted, and it can effectively dock with the testing machine to ensure the smooth progress of the test. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present utility model and these drawings.
[0024] Figure 1 is a schematic diagram of a clamping device for testing the strength of the R region of a composite material of the present utility model;
[0025] Figure 2 is an exploded view of the first hinged assembly and the first clamping assembly in a clamping device for testing the strength of the R region of a composite material of the present utility model;
[0026] Figure 3 is an exploded view of the second hinged assembly and the second clamping assembly in a clamping device for testing the strength of the R region of a composite material of the present utility model.
[0027] In the figure:
[0028] 10. Test piece; 1. First hinged assembly; 11. First hinge; 111. First mounting hole; 12. First rotating shaft; 2. First clamping assembly; 21. First support plate; 211. First connection hole; 22. First pressing plate; 221. Second connection hole; 3. Second clamping assembly; 31. Second support plate; 311. Third connection hole; 32. Second pressing plate; 321. Fourth connection hole; 4. Second hinged assembly; 41. Second hinge; 411. Second mounting hole; 42. Second rotating shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0029] Before explaining any embodiments of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements set forth in the following description or shown in the above drawings.
[0030] In the present application, the terms "comprising", "including", "having" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising that element.
[0031] In the present application, the terms "connect", "combine", "couple", "mount" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. For example, direct connection means that two parts or components are connected together without an intermediate member, and indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.
[0032] In the present application, those of ordinary skill in the art will understand that the functions performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by a part can also be performed by one part, one component, or a combination of multiple parts.
[0033] In the present application, the orientation terms such as "upper", "lower", "left", "right", "front", "rear", etc. are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that one element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element. It should also be understood that the orientation terms such as upper side, lower side, left side, right side, front side, rear side, etc. not only represent the positive orientation, but can also be understood as the side orientation. For example, the lower side can include directly below, lower left, lower right, lower front, and lower rear, etc.
[0034] When performing a tensile test on the R region of a test piece made of a composite material, in order to be able to effectively fix the test piece and effectively dock with the testing machine to ensure the smooth progress of the test, as Figures 1-3As shown in the figure, the present utility model provides a clamping device for testing the strength of the R region of a composite material. The clamping device for testing the strength of the R region of a composite material includes a first hinge assembly 1, a first clamping assembly 2, a second hinge assembly 4, and a second clamping assembly 3.
[0035] Among them, the first hinge assembly 1 is used to dock with a tensile testing machine. The first clamping assembly 2 is hinged to the first hinge assembly 1, and the first clamping assembly 2 is used to clamp one end of the R region of the test piece 10. The second clamping assembly 3 is used to clamp the other end of the R region of the test piece 10; the second hinge assembly 4 is used to dock with the tensile testing machine, and the second hinge assembly 4 is hinged to the end of the second clamping assembly 3 away from the first clamping assembly 2.
[0036] Through the above settings, the test piece 10 is clamped between the first clamping assembly 2 and the second clamping assembly 3, which is convenient for fixing the test piece 10. By docking the first hinge assembly 1 and the second hinge assembly 4 with the tensile testing machine, since the first hinge assembly 1 is hinged to the first clamping assembly 2 and the second hinge assembly 4 is hinged to the second clamping assembly 3, the assembly stress after installing the test piece 10 can be eliminated, and at the same time, a certain dimensional error can be adapted, and it can be effectively docked with the testing machine to ensure the smooth progress of the test.
[0037] Furthermore, the first hinge assembly 1 includes a first rotating shaft 12 and a first hinge member 11. The first rotating shaft 12 is arranged on the first hinge member 11 and the first support plate 21 of the first clamping assembly 2, and the first hinge member 11 is used to dock with the tensile testing machine. Through the above settings, it is convenient to connect the first hinge member 11 with the first clamping assembly 2 and the tensile testing machine.
[0038] Furthermore, a first mounting hole 111 is provided at the end of the first hinge member 11 away from the first clamping assembly 2. When the first hinge member 11 is docked with the tensile testing machine, a bolt is used to pass through the first mounting hole 111 and dock with the tensile testing machine, which is convenient for quick installation and disassembly, and at the same time, it can ensure that no additional bending moment will be generated when applying a tensile load.
[0039] Furthermore, the first clamping assembly 2 includes a first support plate 21, a first pressing plate 22, and a first fastener. The first support plate 21 is rotatably connected to the first hinge member 11 through the first rotating shaft 12. The first support plate 21 has a first inclined surface, and one end of the R region of the test piece 10 can be clamped between the first inclined surface and the first pressing plate 22. The first fastener is arranged on the first support plate 21 and the first pressing plate 22. Specifically, the inclination angle of the first inclined surface is the same as the inclination angle of the end of the R region of the clamped test piece 10, which can ensure that the first support plate 21, the first pressing plate 22, and the first fastener can stably clamp the end of the R region of the test piece 10 and ensure the smooth progress of the test.
[0040] Further, a first connection hole 211 is formed in the first pallet 21, and a second connection hole 221 opposite to the first connection hole 211 is formed in the first pressing plate 22. The first fastener is inserted through the first connection hole 211 and the second connection hole 221. Specifically, in order to improve the strength of one end of the test piece 10 in the R area, a plurality of first connection holes 211 are spaced apart on the first pallet 21, and a plurality of second connection holes 221 opposite to the first connection holes 211 are spaced apart on the first pressing plate 22. The first fastener sequentially passes through the second connection hole 221, the test piece 10, and the first connection hole 211 and is connected to a nut. By the above method, the installation of the test piece 10 is facilitated. Moreover, the test piece 10 can be prevented from slipping or deflecting when the tensile load is large.
[0041] Further, the second clamping assembly 3 includes a second pallet 31, a second pressing plate 32, and a second fastener. The second pallet 31 has a second inclined surface, and the other end of the R area of the test piece 10 can be clamped between the second inclined surface and the second pressing plate 32. The second fastener is arranged on the second pallet 31 and the second pressing plate 32. Specifically, the inclination angle of the second inclined surface is the same as the inclination angle of the end of the R area of the clamped test piece 10, which can ensure that the second pallet 31, the second pressing plate 32, and the second fastener can stably clamp the end of the R area of the test piece 10 and ensure the smooth progress of the test.
[0042] Further, a third connection hole 311 is formed in the second pallet 31, and a fourth connection hole 321 opposite to the third connection hole 311 is formed in the second pressing plate 32. The second fastener is inserted through the third connection hole 311 and the fourth connection hole 321. Specifically, in order to improve the strength of the other end of the test piece 10 in the R area, a plurality of third connection holes 311 are spaced apart on the second pallet 31, and a plurality of fourth connection holes 321 opposite to the third connection holes 311 are spaced apart on the second pressing plate 32. The second fastener sequentially passes through the fourth connection hole 321, the test piece 10, and the third connection hole 311 and is connected to a nut. By the above method, the installation of the test piece 10 is facilitated. Moreover, the test piece 10 can be prevented from slipping or deflecting when the tensile load is large.
[0043] Further, the third connection hole 311 is a strip-shaped hole, and the third connection hole 311 extends along the inclination direction of the second inclined surface. By the above setting, the test piece 10 can move along the extension direction of the third connection hole 311, and the fixture system can be adapted to test pieces 10 with different thicknesses.
[0044] Furthermore, the second hinge assembly 4 includes a second rotating shaft 42 and a second hinge member 41. The second rotating shaft 42 is disposed through the second hinge member 41 and the second support plate 31 of the second clamping assembly 3, and the second hinge member 41 is used for docking with a tensile testing machine. Through the above arrangement, it is convenient to connect the second hinge member 41 with the second support plate 31 of the second clamping assembly 3 and the tensile testing machine.
[0045] Furthermore, a second mounting hole 411 is formed at one end of the second hinge member 41 away from the second clamping assembly 3. When the second hinge member 41 is docked with the tensile testing machine, a bolt is used to pass through the second mounting hole 411 and dock with the tensile testing machine, which is convenient for quick installation and disassembly. At the same time, it can ensure that no additional bending moment will be generated when applying a tensile load.
[0046] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.
Claims
1. Clamping device for testing the strength of the R region of a composite material, characterized in that Comprising: A first hinge assembly (1) for docking with a tensile testing machine; A first clamping assembly (2), the first clamping assembly (2) being hinged to the first hinge assembly (1) and used for clamping one end of the R region of the test piece (10); A second clamping assembly (3), the second clamping assembly (3) being used for clamping the other end of the R region of the test piece (10); A second hinge assembly (4) for docking with a tensile testing machine, the second hinge assembly (4) being hinged to one end of the second clamping assembly (3) away from the first clamping assembly (2).
2. The clamping device for testing the strength of the R region of the composite material according to claim 1, wherein, The first hinge assembly (1) includes a first rotating shaft (12) and a first hinge member (11), the first rotating shaft (12) being arranged through the first hinge member (11) and the first clamping assembly (2), and the first hinge member (11) being used for docking with the tensile testing machine.
3. The clamping device for testing the strength of the R region of the composite material according to claim 2, wherein One end of the first hinge member (11) away from the first clamping assembly (2) is provided with a first mounting hole (111).
4. The clamping device for testing the strength of the R region of the composite material according to claim 2, characterized in that, The first clamping assembly (2) includes a first support plate (21), a first pressing plate (22) and a first fastener. The first support plate (21) is rotatably connected to the first hinge member (11) through the first rotating shaft (12). The first support plate (21) has a first inclined surface, and one end of the R region of the test piece (10) can be clamped between the first inclined surface and the first pressing plate (22). The first fastener is arranged on the first support plate (21) and the first pressing plate (22).
5. The clamping device for testing the strength of the R region of the composite material according to claim 4, characterized in that, A first connection hole (211) is provided on the first support plate (21), a second connection hole (221) opposite to the first connection hole (211) is provided on the first pressing plate (22), and the first fastener is arranged through the first connection hole (211) and the second connection hole (221).
6. The composite material R-region strength test clamping device according to claim 1, wherein The second clamping assembly (3) includes a second support plate (31), a second pressing plate (32) and a second fastener. The second support plate (31) has a second inclined surface, and the other end of the R region of the test piece (10) can be clamped between the second inclined surface and the second pressing plate (32). The second fastener is arranged on the second support plate (31) and the second pressing plate (32).
7. The clamping device for testing the strength of the R region of the composite material according to claim 6, characterized in that, A third connection hole (311) is provided on the second support plate (31), a fourth connection hole (321) opposite to the third connection hole (311) is provided on the second pressing plate (32), and the second fastener is arranged through the third connection hole (311) and the fourth connection hole (321).
8. The composite material R-region strength test clamping device according to claim 7, characterized in that, The third connection hole (311) is a strip-shaped hole, and the third connection hole (311) extends along the inclination direction of the second inclined surface.
9. The clamping device for testing the strength of the R region of the composite material according to claim 1, wherein, The second hinge assembly (4) includes a second rotating shaft (42) and a second hinge member (41), the second rotating shaft (42) being arranged through the second hinge member (41) and the second clamping assembly (3), and the second hinge member (41) being used for docking with the tensile testing machine.
10. The clamping device for testing the strength of the R region of the composite material according to claim 9, wherein, One end of the second hinge member (41) away from the second clamping assembly (3) is provided with a second mounting hole (411).