Impact test device and impact test apparatus for composite material plate

Abstract

This utility model belongs to the technical field of experimental testing equipment, and discloses an impact testing clamping device and impact testing equipment for composite material plates. The impact testing clamping device for composite material plates includes a base plate, a positioning component, and a clamping component. The base plate is provided with a guide groove extending along a first direction, and an impact window is opened at the bottom of the guide groove. The positioning component is disposed within the guide groove and is adjustablely connected to the base plate along the first direction. The positioning component can block the impact window. The test piece abuts against the positioning component along the side wall of the test piece along the first direction. The clamping component is connected to the base plate and abuts against the side of the test piece facing away from the bottom wall of the guide groove, thereby pressing the test piece firmly onto the base plate. The positioning component can be adjusted in position according to test pieces of different specifications to position test pieces of different specifications. Furthermore, by adjusting the positioning component, the test piece can also be fixed in different positions, thereby adjusting the impact position on the test piece.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to an impact testing clamping device and impact testing equipment for composite material plates. Background Technology

[0002] Composite materials, especially high-strength, high-modulus carbon fiber composites and sandwich structures, have been widely used in the airframe structures of modern aircraft due to their excellent specific strength, specific stiffness, and designability. These include critical load-bearing components such as fuselages, wings, rudders, and elevators. The structural integrity of these components is directly related to flight safety; therefore, the assessment and evaluation of their impact resistance has always been a core aspect of composite material structure design, allowable value determination, and airworthiness certification.

[0003] Internationally, a series of standards for impact testing of composite materials have been established, such as ASTM D7136 and BSS 7620. These standards have strict requirements on the specifications of the test specimens, the support boundary conditions and the impact location, and provide specific test fixtures.

[0004] However, the test specimen specifications and fixture forms specified in the standards are relatively fixed, making it difficult to adapt to the testing needs of non-standard, large-size, or special-configuration test specimens that exceed the standard range, and failing to meet the needs of cutting-edge exploratory research on new materials and structures. Furthermore, the support windows of existing fixtures are usually non-adjustable or extremely cumbersome to adjust, making it difficult to conveniently realize test specimens with different support boundary conditions, which is not conducive to the rapid conduct of experiments and results in low economy and efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide an impact testing clamping device and impact testing equipment for composite material plates. The impact testing clamping device for composite material plates can clamp test pieces of different specifications and can adjust the impact position on the test pieces.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On the one hand, an impact testing clamping device for composite material plates is provided, comprising:

[0008] A base plate, wherein a guide groove extending in a first direction is provided on the base plate, and an impact window is provided at the bottom of the guide groove;

[0009] A positioning component is disposed in the guide groove and is tunably connected to the base plate along the first direction. The positioning component can block the impact window, and the test piece abuts against the positioning component along the side wall of the first direction.

[0010] A clamping member is connected to the base plate and abuts against the side of the test piece facing away from the guide groove to press the test piece firmly against the base plate.

[0011] Optionally, the positioning component includes a window adjustment member and a first positioning member. The window adjustment member is adjustablely connected to the base plate along the first direction, and the first positioning member is connected to the window adjustment member. The side wall of the test piece abuts against the first positioning member.

[0012] Optionally, the impact test clamping device for composite material plates further includes a first bolt and a first nut, the window adjustment component is provided with a first waist-shaped hole, the bottom of the guide groove is provided with a first through hole, and the first bolt passes through the first waist-shaped hole and the first through hole and is threadedly connected to the first nut.

[0013] Optionally, the impact test clamping device for the composite material plate further includes a second positioning member, which is connected to the base plate, and the side wall of the test piece along the second direction abuts against the second positioning member.

[0014] Optionally, at least two clamping members are provided along the first direction, and each clamping member is adjustablely connected to the base plate along the first direction.

[0015] Optionally, the impact test clamping device for composite material plates further includes a second bolt and a second nut, the base plate is provided with a second oblong hole, the clamping member is provided with a second through hole, and the second bolt passes through the second oblong hole and the second through hole and is threadedly connected to the second nut.

[0016] Optionally, the base plate is provided with scale lines along the first direction.

[0017] Optionally, the base plate is provided with a center line extending along a second direction, the center line is located at the center of the impact window, and the scale lines are symmetrically arranged about the center line.

[0018] Optionally, the impact test clamping device for composite material plates further includes a support assembly, the base plate being connected to the support assembly, and the support assembly having a third positioning hole for fixing the support assembly.

[0019] On the other hand, an impact testing device is provided, including a working platform, a drop hammer, and the aforementioned impact testing clamping device for composite material plates. The base plate is disposed on and connected to the working platform, and the drop hammer is disposed above the base plate and corresponds to the impact window.

[0020] The beneficial effects of this utility model are:

[0021] This invention provides an impact testing clamping device and impact testing equipment for composite material plates. The impact testing clamping device for composite material plates includes a base plate, a positioning component, and a clamping component. The base plate has a guide groove extending along a first direction, with an impact window at the bottom. The positioning component is disposed within the guide groove and is adjustablely connected to the base plate along the first direction. The positioning component can block the impact window. The test piece abuts against the positioning component along its sidewall in the first direction. The clamping component is connected to the base plate and abuts against the side of the test piece facing away from the bottom wall of the guide groove, thus pressing the test piece firmly onto the base plate. The positioning component can be adjusted in position according to test pieces of different specifications to position test pieces of different sizes. Furthermore, by adjusting the positioning component, the test piece can be fixed in different positions, thereby adjusting the impact position on the test piece. Adjusting the position of the positioning component also adjusts the area of ​​the impact window it blocks, thereby adjusting the size of the impact window. This invention relates to a clamping device for impact testing of composite material plates, which effectively meets the requirements for fixing test specimens during impact testing in the ASTM D7136 Falling Hammer Impact Standard Test Method. By adjusting the position of the positioning components, test specimens of different specifications can be accurately positioned and forcefully clamped, which facilitates rapid testing and improves economy and testing efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the impact testing clamping device for composite material plates provided in this embodiment of the utility model;

[0023] Figure 2 This is a structural schematic diagram of the impact testing clamping device (without support components) for composite material plates provided in this embodiment of the utility model;

[0024] Figure 3 This is one of the structural schematic diagrams of the impact test clamping device and test piece 100 for composite material plates provided in this utility model embodiment;

[0025] Figure 4 This is the second structural schematic diagram of the impact test clamping device and test piece 100 for composite material plates provided in this embodiment of the present invention.

[0026] In the picture:

[0027] 1. Base plate; 11. Guide groove; 12. Impact window; 13. First through hole; 14. Second oblong hole; 15. Scale line; 16. Center line; 17. Second positioning hole; 2. Positioning assembly; 21. Window adjustment component; 211. First oblong hole; 212. First positioning hole; 213. Handheld hole; 22. First positioning component; 3. Clamping component; 31. Second through hole; 4. First bolt; 5. Second positioning component; 6. Second bolt; 7. Support assembly; 71. Third positioning hole; 72. Support plate; 73. Support column;

[0028] 100. Test specimen. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar parts or parts having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In the description of this utility model, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0033] like Figure 1 and Figure 2As shown, this embodiment provides a clamping device for impact testing of composite material plates. The clamping device for impact testing of composite material plates includes a base plate 1, a positioning component 2, and a clamping component 3. The base plate 1 is provided with a guide groove 11 extending along a first direction. An impact window 12 is opened at the bottom of the guide groove 11. The positioning component 2 is disposed within the guide groove 11 and is adjustablely connected to the base plate 1 along the first direction. The positioning component 2 can block the impact window 12. The test piece 100 abuts against the positioning component 2 along its sidewall in the first direction. The clamping component 3 is connected to the base plate 1 and abuts against the side of the test piece 100 facing away from the bottom wall of the guide groove 11, thereby pressing the test piece 100 firmly onto the base plate 1. The positioning component 2 can be adjusted in position according to different specifications of the test piece 100 to position test pieces 100 of different specifications. Furthermore, by adjusting the positioning component 2, the test piece 100 can also be fixed in different positions, thereby adjusting the impact position on the test piece 100. By adjusting the position of the positioning component 2, the area of ​​the positioning component 2 blocking the impact window 12 can also be adjusted, thereby adjusting the size of the impact window 12. The impact test clamping device for composite material plates in this embodiment effectively meets the requirements for fixing the test specimen 100 during impact testing in the ASTM D7136 falling hammer impact standard test method. By adjusting the position of the positioning component 2, test specimens 100 of different specifications can be accurately positioned and forcefully clamped, which facilitates rapid testing and improves economy and testing efficiency.

[0034] Specifically, base plate 1 is a rectangular plate. The first direction is... Figure 2 In the X direction, the first direction is the length direction of the base plate 1; the second direction is... Figure 2 The Y direction is defined in the first part, and the second direction is the width direction of the base plate 1. The clamping member 3 is a clamping clamp, and the part of the clamping member 3 that contacts the test piece 100 is made of rubber, which can effectively fix the test piece 100 and avoid damage to the test piece 100. The pressure column on the clamping member 3 can be moved and locked in the vertical direction by bolts, so the position of the clamping member 3 in the vertical direction is adjustable to fix the test piece 100 of different thicknesses. The specific structure of the clamping clamp is based on the prior art and will not be described in detail here.

[0035] Optionally, the positioning component 2 includes a window adjustment member 21 and a first positioning member 22. The window adjustment member 21 is adjustablely connected to the base plate 1 along a first direction, and the first positioning member 22 is connected to the window adjustment member 21. The side wall of the test specimen 100 abuts against the first positioning member 22. By adjusting the position of the window adjustment member 21, the position of the first positioning member 22 can be adjusted, thereby allowing the first positioning member 22 to abut against the side wall of the test specimen 100 of different specifications.

[0036] Specifically, two window adjustment components 21 are provided, spaced apart along the first direction and symmetrical about the center of the impact window 12. The first positioning component 22 is a positioning pin, which is inserted into the first positioning hole 212 on one of the window adjustment components 21. The first positioning hole 212 is located 12.5 mm from the edge of the window adjustment component 21 along the first direction. The test specimen 100 is placed on the two window adjustment components 21, with its sidewall abutting against the positioning pin. The window adjustment component 21 is also provided with a handheld hole 213, allowing the operator to easily move the window adjustment component 21.

[0037] Optionally, the impact testing clamping device for composite material plates further includes a first bolt 4 and a first nut. A first oblong hole 211 is provided on the window adjusting member 21, and a first through hole 13 is provided at the bottom of the guide groove 11. The first bolt 4 passes through the first oblong hole 211 and the first through hole 13 and is threadedly connected to the first nut. Loosening the first nut adjusts the window adjusting member 21 to a suitable position, and then tightening the first nut fixes the window adjusting member 21.

[0038] Optionally, the impact test clamping device for the composite material plate further includes a second positioning element 5, which is connected to the base plate 1. The test piece 100 abuts against the second positioning element 5 along its sidewall in the second direction to position the test piece 100 along the second direction. Specifically, the second positioning element 5 is a positioning pin. The guide groove 11 on the base plate 1 has second positioning holes 17 on both sides along the second direction, and the second positioning element 5 is inserted into one of the second positioning holes 17. The distance between the second positioning hole 17 and the edge of the guide groove 11 is 12.5 mm.

[0039] Optionally, at least two clamping members 3 are provided along the first direction, and each clamping member 3 is arbitrarily connected to the base plate 1 along the first direction, thereby adjusting the clamping member 3 to a suitable position according to different types of test specimens 100 and improving the fixing strength of the clamping member 3 to the test specimen 100. Specifically, four clamping members 3 are provided, with two clamping members 3 respectively provided on both sides of the guide groove 11 on the base plate 1 along the second direction, and the clamping members 3 located on the same side of the guide groove 11 are spaced apart along the first direction.

[0040] Optionally, the impact testing clamping device for composite material plates further includes a second bolt 6 and a second nut. A second oblong hole 14 is provided on the base plate 1, and a second through hole 31 is provided on the clamping member 3. The second bolt 6 passes through the second oblong hole 14 and the second through hole 31 and is threadedly connected to the second nut. Loosen the second nut, adjust the clamping member 3 to a suitable position, and then tighten the second nut to fix the clamping member 3.

[0041] Optionally, a scale line 15 is provided on the base plate 1 along the first direction. The scale line 15 can display the position of the window adjustment component 21 in real time, which is convenient for the staff to adjust and ensure the positional accuracy of the window adjustment component 21. Specifically, scale lines 15 are provided on both sides of the guide groove 11 on the base plate 1 along the second direction, and the scale lines 15 on both sides of the guide groove 11 are arranged opposite to each other.

[0042] Optionally, a center line 16 extending along the second direction is provided on the base plate 1. The center line 16 is located at the center of the impact window 12, that is, the center line 16 corresponds to the impact point. The scale lines 15 are symmetrically arranged about the center line 16. This facilitates the positioning of the test piece 100 on both sides along the first direction. Furthermore, when performing a non-center point impact damage test, lines can be manually drawn on the upper edge of the base plate 1 to determine the fixed position of the test piece 100, thus completing the test task under special working conditions such as the non-center point impact damage test. After the test, the drawn lines on the edge can be cleaned with organic solvents such as alcohol or acetone to avoid affecting subsequent use. This method not only meets the requirements of rapid mounting for batch testing, but also provides good support for customized test tasks. It is economical and efficient, significantly improving the efficiency of the device.

[0043] Optionally, the impact testing clamping device for composite material plates further includes a support assembly 7, to which the base plate 1 is connected. The support assembly 7 has a third positioning hole 71 for fixing the support assembly 7. The support assembly 7 is used to fix the base plate 1 on the working platform.

[0044] Specifically, the support assembly 7 includes a support plate 72 and support columns 73. The support plate 72 is a square plate, and a third positioning hole 71 is provided on the support plate 72. Four support columns 73 are provided, each extending vertically and fixed to the four corners of the support plate 72 by screws. The support plate 72 and the four support columns 73 allow the support assembly 7 to occupy a small space while having high structural strength, and at the same time, they provide good stability for fixing the base plate 1. The support plate 72 is a metal sheet, and the support columns 73 are metal cylinders. The base plate 1 is connected to the end of the support column 73 away from the support plate 72 by positioning pins and hexagonal socket head cap screws.

[0045] like Figure 3As shown, when an impact test is performed on a standard test piece 100 with a length of 150 mm and a width of 100 mm, and the impact point is located in the center, the width direction of the test piece is the first direction. The impact window 12 is required to be 125 mm long and 75 mm wide. Therefore, the dimension of the window adjustment piece 21 along the second direction is 125 mm. The edges of the two window adjustment pieces 21 on opposite sides are locked and fixed at a distance of 37.5 mm from the center line 16 to the scale line 15. At this time, the dimension of the impact window 12 just meets the requirements. Installing the first positioning piece 22 in the first positioning hole 212 can achieve precise positioning of the test piece 100 along the first direction. Installing the second positioning piece 5 in the second positioning hole 17 can achieve precise positioning of the test piece 100 along the second direction.

[0046] like Figure 4 As shown, when an impact test is performed on a standard test piece 100 with a length of 150 mm and a width of 225 mm, and the impact point is located in the center, the width direction of the test piece is the first direction. The impact window 12 is required to be 125 mm long and 200 mm wide. Therefore, the dimension of the window adjustment piece 21 along the second direction is 125 mm. The edges of the two window adjustment pieces 21 on opposite sides are locked and fixed at a distance of 100 mm from the scale line 15 to the center line 16. At this time, the dimension of the impact window 12 just meets the requirements. Installing the first positioning piece 22 in the first positioning hole 212 can achieve precise positioning of the test piece 100 along the first direction. Installing the second positioning piece 5 in the second positioning hole 17 can achieve precise positioning of the test piece 100 along the second direction.

[0047] This embodiment also provides an impact testing device, which includes a working platform, a drop hammer, and the aforementioned impact testing clamping device for composite material plates. A base plate 1 is disposed on and connected to the working platform, and the drop hammer is disposed above the base plate 1 and corresponds to the impact window 12. Specifically, the support plate 72 is fixedly connected to the working platform by screws or bolts.

[0048] The specific operating steps for using this impact testing equipment are as follows:

[0049] The first step is to clean the impact test clamping device and work platform of the composite material plate to ensure that there is no dust, grease or other debris, and clean them with acetone or alcohol and let them dry.

[0050] The second step is to precisely move the window adjustment component 21 and lock it in place.

[0051] The third step is to install the first positioning element 22 in the first positioning hole 212 on a window adjustment element 21, and install the second positioning element 5 in the second positioning hole 17 on one side.

[0052] The fourth step is to place the test piece 100 on the base plate 1 and make the side wall of the test piece 100 abut against the first positioning member 22 and the second positioning member 5;

[0053] Fifth step: Adjust the position of clamping component 3 and clamp and fix the test piece 100;

[0054] The sixth step is to conduct a drop hammer impact test.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A clamping device for impact testing of composite material plates, characterized in that, include: The base plate (1) is provided with a guide groove (11) extending in a first direction, and an impact window (12) is provided at the bottom of the guide groove (11). Positioning component (2), the positioning component (2) is disposed in the guide groove (11), the positioning component (2) is tunably connected to the base plate (1) along the first direction, the positioning component (2) can block the impact window (12), and the test piece (100) abuts against the positioning component (2) along the side wall of the first direction. A clamping member (3) is connected to the base plate (1) and abuts against the bottom wall of the test piece (100) facing away from the guide groove (11) to press the test piece (100) onto the base plate (1).

2. The impact testing clamping device for composite material plates according to claim 1, characterized in that, The positioning component (2) includes a window adjustment component (21) and a first positioning component (22). The window adjustment component (21) is tunably connected to the base plate (1) along the first direction. The first positioning component (22) is connected to the window adjustment component (21). The side wall of the test piece (100) abuts against the first positioning component (22).

3. The impact testing clamping device for composite material plates according to claim 2, characterized in that, The impact test clamping device for composite material plates also includes a first bolt (4) and a first nut. The window adjustment member (21) is provided with a first waist-shaped hole (211), and the bottom of the guide groove (11) is provided with a first through hole (13). The first bolt (4) passes through the first waist-shaped hole (211) and the first through hole (13) and is threadedly connected to the first nut.

4. The impact testing clamping device for composite material plates according to claim 2, characterized in that, The impact test clamping device for the composite material plate also includes a second positioning element (5), which is connected to the base plate (1), and the test piece (100) abuts against the second positioning element (5) along the side wall in the second direction.

5. The impact testing clamping device for composite material plates according to claim 1, characterized in that, At least two clamping members (3) are provided along the first direction, and each clamping member (3) is tunably connected to the base plate (1) along the first direction.

6. The impact testing clamping device for composite material plates according to claim 5, characterized in that, The impact test clamping device for composite material plates also includes a second bolt (6) and a second nut. The base plate (1) is provided with a second waist-shaped hole (14), and the clamping member (3) is provided with a second through hole (31). The second bolt (6) passes through the second waist-shaped hole (14) and the second through hole (31) and is threadedly connected to the second nut.

7. The impact testing clamping device for composite material plates according to claim 1, characterized in that, The base plate (1) is provided with scale lines (15) along the first direction.

8. The impact testing clamping device for composite material plates according to claim 7, characterized in that, The base plate (1) is provided with a center line (16) extending in the second direction. The center line (16) is located at the center of the impact window (12). The scale line (15) is symmetrically arranged about the center line (16).

9. The impact testing clamping device for composite material plates according to any one of claims 1-8, characterized in that, The impact test clamping device for composite material plates also includes a support assembly (7), the base plate (1) is connected to the support assembly (7), and the support assembly (7) is provided with a third positioning hole (71) for fixing the support assembly (7).

10. An impact testing apparatus, characterized in that, The device includes a working platform, a drop hammer, and an impact test clamping device for composite material plates as described in any one of claims 1-9. The base plate (1) is disposed on and connected to the working platform, and the drop hammer is disposed above the base plate (1) and corresponds to the impact window (12).

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