Composite material fatigue analysis test device and method

Abstract

The invention discloses a composite material fatigue analysis test device and method.The composite material fatigue analysis test device comprises a protection box, an electric hydraulic auxiliary assembly, a fixing table, upper clamping blocks and lower clamping blocks and further comprises a fixing disc, the fixing disc is fixed to the bottom end of an electric hydraulic telescopic rod, the upper clamping blocks comprise the first upper clamping block and the second upper clamping block, the first upper clamping block is rotationally arranged on the fixing disc, and the second upper clamping block is rotationally arranged on the fixing disc; a fixing rod is fixed to the upper end of the first upper clamping block, a through hole is formed in the fixing rod, a plurality of threaded holes are formed in the fixing disc in the circumferential direction, a bolt is arranged in the through hole, the second upper clamping block is fixed to the fixing disc, an included angle is formed between the first upper clamping block and the second upper clamping block, and the top end of the lower clamping block extends into the included angle formed by the first upper clamping block and the second upper clamping block. The problems that the angle of the upper clamping block and the angle of the lower clamping block are fixed, only the composite material can be bent at the same angle, analysis is few, fixing of the composite material is troublesome, and the composite material is prone to being clamped on the lower clamping block after repeated bending are solved.

Description

Technical Field

[0001] The invention relates to a composite material fatigue analysis test device and method, belonging to the field of composite material fatigue test. Background Art

[0002] Carbon fiber composite material is a new type of material composed of carbon fiber and resin, graphene, metal, ceramic and other materials. It has excellent properties such as high strength and high modulus. Carbon fiber composite material mainly processes organic fibers through carbonization and graphitization to give them the inherent properties of carbon materials while maintaining the softness and processability of textile fibers. With the development of carbon fiber composite materials, various fatigue analysis test equipment have emerged, such as a composite material fatigue analysis test device.

[0003] At present, the composite material fatigue analysis test equipment on the market is mainly improved in terms of fixing stability. The existing composite material fatigue analysis test equipment is composed of an electric telescopic rod, an upper clamp and a lower clamp. The composite material is placed on the lower clamp, and the electric telescopic rod is continuously extended and retracted to drive the upper clamp to repeatedly bend the composite material, thereby performing a fatigue analysis test on the composite material. However, the angles of the upper clamp and the lower clamp are fixed, and the composite material can only be bent at the same angle. There are fewer aspects of analysis, and the fixing of the composite material is more troublesome. After repeated bending, it is easy to get stuck on the lower clamp. Summary of the invention

[0004] The purpose of the present invention is to provide a composite material fatigue analysis test device to solve the technical defects that the angles of the upper clamp block and the lower clamp block in the above technology are fixed, the composite material can only be bent at the same angle, and the analysis is less.

[0005] In order to solve the above problems, the technical solution adopted by the present invention is: a composite material fatigue analysis test device, including a protection box, an electric hydraulic auxiliary component, a fixed platform, an upper clamping block and a lower clamping block, the electric hydraulic auxiliary component is arranged on the top of the protection box, and its electric hydraulic telescopic rod extends downward into the protection box, the upper clamping block is fixed to the bottom end of the electric hydraulic telescopic rod, the fixed platform is fixed in the protection box, and the lower clamping block is fixed on the fixed platform, including a fixed plate, the fixed plate is fixed to the bottom end of the electric hydraulic telescopic rod and moves synchronously with the vertical movement of the electric hydraulic telescopic rod, the upper clamping block includes an upper clamping block 1 and an upper clamping block 2, and the upper clamping block 1 rotates The cam is provided with a plurality of threaded holes along a circumferential direction, and bolts are provided in the through holes. The bolts are inserted into the through holes and different threaded holes and are threadably matched with the threaded holes to fix the upper clamping block 1 after the angle of the upper clamping block 1 is adjusted. The upper slider 2 is fixed to the fixed disk, and an angle is formed between the upper clamping block 1 and the upper slider 2. The rotation of the upper clamping block 1 is used to adjust the angle between the upper clamping block 1 and the upper slider 2, and the top end of the lower clamping block extends into the angle formed by the upper clamping block 1 and the upper slider 2.

[0006] As a further improvement of the present invention, it also includes an installation mechanism located on one side of the upper clamping block, the installation mechanism includes an adjustment box, a threaded rod, an internal threaded sleeve, a slider and a clamping block, the adjustment box is fixed on the fixed platform, the threaded rod passes through the adjustment box and is rotatably connected to the adjustment box, the internal threaded sleeve is located in the adjustment box and is threadedly matched with the threaded rod, a guide groove parallel to the threaded rod is opened on the top of the adjustment box, the slider is located in the guide groove and its bottom end is fixed to the internal threaded sleeve, the clamping block is fixed to the top of the slider, and the rotating threaded rod is used to drive the slider to move in the guide groove to adjust the distance between the clamping block and the lower clamping block, so as to clamp or loosen the composite sheet when in use.

[0007] As a further improvement of the present invention, it further comprises more than one rubber block, and the rubber block is fixed on one side of the clamping block close to the lower clamping block.

[0008] As a further improvement of the present invention, it also includes a connecting rod and a fixed block, the top end of the connecting rod is fixedly connected to the slider, the bottom end of the connecting rod is fixedly connected to the internal threaded sleeve, the slider is located in the guide groove, the fixed block is fixed at one end of the adjustment box close to the lower clamping block, and the end of the threaded rod located in the adjustment box is rotatably connected to the fixed block by a bearing.

[0009] As a further improvement of the present invention, a spring block is provided on the side of the lower clamp block away from the upper clamp block 2. The spring block is connected to the lower clamp block by at least one spring. When the upper clamp block moves downward to extrude the composite sheet, the composite sheet squeezes the spring block to contract the spring. When the upper clamp block moves upward, the spring extends to push the spring block to bounce the composite sheet open.

[0010] As a further improvement of the present invention, a groove having the same shape as the spring block is provided on one side of the lower clamping block where the spring block is provided, and the spring is located in the groove.

[0011] As a further improvement of the present invention, a fixed column is fixed on the fixed plate, a rotating tube is sleeved on the fixed column, the rotating tube can rotate relative to the fixed column, and the rotating tube is fixed to the upper end of the upper clamping block one near the side of the upper clamping block two.

[0012] As a further improvement of the present invention, a control switch is further included. The control switch is arranged on the top of the protection box and is electrically connected to the electric hydraulic auxiliary component for controlling the movement of the electric hydraulic telescopic rod of the electric hydraulic auxiliary component.

[0013] As a further improvement of the present invention, it also includes a movable door, which is arranged at the front of the protection box and is used to open or close the protection box.

[0014] Another object of the present invention is to provide a composite material fatigue analysis test method, using a composite material fatigue analysis test device, comprising the following steps: S1. Open the movable door and remove the bolts on the fixing rod; S2. Hold the fixing rod and rotate it so that the through hole on the fixing rod is aligned with the appropriate threaded hole on the fixing plate, and then pass the bolt through the through hole and engage with the threaded hole to adjust the angle between the upper clamping block 1 and the upper clamping block 2. S3, controlling the electric hydraulic telescopic rod of the electric hydraulic auxiliary component to move upward, pulling the upper clamping block to move upward; S4, rotating the threaded rod to move the clamping block away from the lower clamping block, thereby increasing the distance between the clamping block and the lower clamping block; S5, placing the composite material plate between the clamping block and the lower clamping block, and then rotating the threaded rod in the opposite direction, so that the clamping block pushes the composite material plate to clamp the composite material plate on the lower clamping block; S6. Control the electric hydraulic telescopic rod of the electric hydraulic auxiliary component to move up and down reciprocatingly, and perform continuous bending fatigue analysis tests on the composite material plate. In this process, after the composite material plate is bent, the spring is compressed, and the spring rebounds, and the composite material plate is pushed open by the spring block.

[0015] To sum up, the beneficial effects of the present invention are as follows: by setting an adjustment mechanism, when the bending angle needs to be adjusted, the transparent window movable door is opened, the bolt of the fixing rod is removed, the fixing rod is supported and then rotated counterclockwise to adjust to a suitable position of the threaded hole, and the bolt is installed on the threaded hole. The intervals of the angles formed by the threaded holes are the same, thereby adjusting the angle of the upper clamping block one to form a different angle with the upper clamping block two. The adjustment mechanism can adjust the angle of the clamp, increase the experimental data of different bending angles, and facilitate experimental analysis.

[0016] The present invention sets a mounting mechanism. When the composite material plate needs to be installed, the electric hydraulic telescopic rod is retracted by controlling the switch, the composite material plate is placed between the clamping block and the lower clamping block, the threaded rod is rotated clockwise to make the internal threaded tube move horizontally to the right, driving the clamping block and the rubber block to clamp the composite material plate, and then the electric hydraulic telescopic rod is repeatedly extended and retracted by controlling the switch, and the composite material plate is continuously subjected to bending fatigue analysis. After the composite material plate is bent, the spring is compressed, and the spring rebounds, and the composite material plate is pushed open by the spring block to avoid being stuck and difficult to remove. The mounting mechanism can make the composite material plate quickly and simply fixed, not easy to get stuck and easy to remove. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the structure of the present invention.

[0018] Figure 2 It is a front cross-sectional view of the structure of the present invention.

[0019] Figure 3 The structure of the present invention Figure 2 Enlarged view of point A in the middle.

[0020] Figure 4 The structure of the present invention Figure 2 Enlarged view of point B in the middle.

[0021] Figure 5 It is a partial stereogram of the structure of the present invention.

[0022] Among them: 1. protection box; 2. electric hydraulic rod auxiliary assembly; 3. adjustment mechanism; 301. electric hydraulic telescopic rod; 302. fixing plate; 303. upper clamping block 1; 304. fixing rod; 305. upper clamping block 2; 306. fixing platform; 307. adjustment box; 308. lower clamping block; 4. installation mechanism; 401. threaded rod; 402. internal threaded sleeve; 403. connecting rod; 404. sliding block; 405. guide groove; 406. clamping block; 407. rubber block; 5. bolt; 501. through hole; 6. threaded hole; 7. fixing column; 701. rotating tube; 8. spring; 801. spring block; 9. fixing block; 10. movable door; 1001. control switch. DETAILED DESCRIPTION

[0023] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings. Example 1

[0024] like Figure 1The composite material fatigue analysis test device shown includes a protection box 1, an electric hydraulic auxiliary component 2, a fixed platform 306, an upper clamp block and a lower clamp block 308. The protection box 1 is a rectangular box-shaped structure. The electric hydraulic auxiliary component 2 is arranged on the top of the protection box 1. The electric hydraulic telescopic rod 301 of the electric hydraulic auxiliary component 2 extends downward into the protection box 1. The upper clamp block is fixed to the bottom end of the electric hydraulic telescopic rod 301. The fixed platform 306 is fixed in the protection box 1. The lower clamp block 308 is fixed on the fixed platform 306. The electric hydraulic telescopic rod 301 moves up and down reciprocatingly, pushing the upper clamp block to move up and down and cooperate with the lower clamp block 308 to perform fatigue analysis tests on the composite material plate placed on the lower clamp block 308.

[0025] like Figure 2 As shown, this embodiment is provided with a fixed plate 302, which is fixed to the bottom end of the electric hydraulic telescopic rod 301 and moves synchronously with the vertical movement of the electric hydraulic telescopic rod 301. The upper clamping block in this embodiment includes an upper clamping block 1 303 and an upper clamping block 2 305. The upper clamping block 1 303 is rotatably arranged on the fixed plate 302, as shown in FIG. Figure 2 and Figure 5 As shown, a fixing rod 304 is fixed to the upper end of the upper clamping block 303, and the length direction of the fixing rod 304 is consistent with the length direction of the upper clamping block 303. The fixing rod 304 is used to adjust the rotation of the upper clamping block 303 relative to the fixing plate 302. In order to fix the upper clamping block 303 in the use state, in this embodiment, a through hole 501 is opened on the fixing rod 304, and a plurality of threaded holes 6 are opened on the fixing plate 302 along the circumferential direction. A bolt 5 is arranged in the through hole 501, and the bolt 5 is inserted into the The lower clamp block 308 is inserted into the through hole 501 and different threaded holes 6 and threadedly cooperates with the threaded holes 6 to fix the upper clamp block 1 303 after the angle of the upper clamp block 1 303 is adjusted. The upper clamp block 2 305 in this embodiment is fixed on the fixed plate 302, and there is an angle between the upper clamp block 1 303 and the upper clamp block 2 305, wherein the upper clamp block 1 303 is rotated to adjust the angle between the upper clamp block 1 303 and the upper clamp block 2 305, and the top end of the lower clamp block 308 extends into the angle formed by the upper clamp block 1 303 and the upper clamp block 2 305.

[0026] like Figure 2 and Figure 3As shown, the mounting mechanism 4 on one side of the upper clamp block 305 of this embodiment includes an adjustment box 307, a threaded rod 401, an internal threaded sleeve 402, a slider 404 and a clamping block 406. The adjustment box 307 is fixed on the top surface of the fixed platform 306. The threaded rod 401 passes through the adjustment box 307 and extends into the adjustment box 307, and is rotatably connected to the adjustment box 307. The internal threaded sleeve 402 is located in the adjustment box 307 and is sleeved on the threaded rod 401 and is connected to the threaded sleeve 402. The threaded rod 401 is threadedly matched, and a guide groove 405 parallel to the threaded rod 401 is opened on the top of the adjustment box 307. The slider 404 is located in the guide groove 405, and the bottom end of the slider 404 is fixed to the internal threaded sleeve 402, and the clamping block 406 is fixed to the top of the slider 404. Rotating the threaded rod 401 is used to drive the slider 404 to move in the guide groove 405 to adjust the distance between the clamping block 406 and the lower clamping block 308, which is used to clamp or loosen the composite board when in use. In order to protect the composite board when in use, the present embodiment is provided with more than one rubber block 407, and the rubber block 407 is fixed on one side of the clamping block 406 close to the lower clamping block 308. The present embodiment is optimally provided with two rubber blocks 407, and the two rubber blocks 407 are respectively fixed on the upper and lower parts of the surface of the clamping block 406 facing the lower clamping block 308. When in use, the rubber block 407 contacts the composite board, and the clamping block 406 does not directly contact the composite board, thereby avoiding damage to the composite board caused by the clamping block 406 and improving the accuracy of the analysis test.

[0027] like Figure 3 As shown, this embodiment is provided with a connecting rod 403 and a fixed block 9, the top end of the connecting rod 403 is fixedly connected to the slider 404, and the bottom end of the connecting rod 403 is fixedly connected to the internal threaded sleeve 402. In this embodiment, the connecting rod 403 is used to realize the fixed connection between the slider 404 and the internal threaded sleeve 402, and the slider 404 is located in the guide groove 405 and cooperates with the guide groove 405 to prevent the block 406 from rotating. The fixed block 9 in this embodiment is fixed to one end of the adjustment box 307 close to the lower clamping block 308, and the end of the threaded rod 401 located in the adjustment box 307 is rotatably connected to the fixed block 9 by a bearing (not shown in the figure), wherein the bearing is located in the fixed block 9.

[0028] like Figure 2 and Figure 4As shown, in this embodiment, a spring block 801 is arranged on the side of the lower clamp block 308 away from the upper clamp block 305. The spring block 801 is connected to the lower clamp block 308 by multiple springs 8. When the upper clamp block moves downward to extrude the composite plate, the composite plate extrude the spring block 801 to shrink the spring 8. When the upper clamp block moves upward, the spring 8 extends and pushes the spring block 801 to eject the composite plate. In this embodiment, a groove with the same shape as the spring block 801 is provided on one side of the lower clamp block 308. The spring 8 is located in the groove. When the composite material plate extrude the spring block 801, the spring block 801 can be received in the groove.

[0029] like Figure 2 As shown, the specific structure of the present embodiment for realizing the rotational connection between the upper clamping block 1 303 and the fixed disk 302 is: a fixed column 7 is fixed on the fixed disk 302, and the fixed column 7 is coaxial with the fixed disk 302. A rotating tube 701 is sleeved on the fixed column 7, and the rotating tube 701 can rotate relative to the fixed column 7. The rotating tube 701 is fixed to the upper end of the upper clamping block 1 303 close to the side of the upper clamping block 2 305, and the upper clamping block 1 303 is rotated relative to the fixed disk 302 through the relative rotation of the rotating tube 701 and the fixed column 7.

[0030] like Figure 1 As shown, the present embodiment is provided with a control switch 1001, which is arranged on the top of the protection box 1 and is electrically connected to the electric hydraulic auxiliary component 2, and is used to control the movement of the electric hydraulic telescopic rod 301 of the electric hydraulic auxiliary component 2. The control switch 1001 itself and its electrical connection structure with the electric hydraulic auxiliary component 2 are both prior arts and will not be described in detail in the present embodiment.

[0031] like Figure 1 As shown, the present embodiment is provided with a movable door 10, which is rotatably arranged at the front of the protection box 1 and is used to open or close the protection box 1. In order to facilitate observation of the test conditions in the protection box 1 during use, the movable door 10 in the present embodiment is made of a transparent material, such as tempered glass or transparent plastic, etc. Figure 1 The movable door 10 in the figure only shows its installation position. Example 2

[0032] This embodiment is a composite material fatigue analysis test method, using the composite material fatigue analysis test device of embodiment 1, including the following steps: S1. Open the movable door 10 and remove the bolt 5 on the fixing rod 304.

[0033] S2. Hold the fixing rod 304 and rotate it so that the through hole 501 on the fixing rod 304 is opposite to the appropriate threaded hole 6 on the fixing plate 302, and then pass the bolt 5 through the through hole 501 and threadably engage with the threaded hole 6, so as to adjust the angle between the upper clamping block 1 303 and the upper clamping block 2 305, and fix the upper clamping block 1 303.

[0034] S3, controlling the electric hydraulic telescopic rod 301 of the electric hydraulic auxiliary assembly 2 to move upward, pulling the fixed plate 302, the upper clamping block 1 303 and the upper clamping block 2 305 to move upward.

[0035] S4. Rotate the threaded rod 401 to move the clamping block 406 away from the lower clamping block 308, thereby increasing the distance between the clamping block 406 and the lower clamping block 308.

[0036] S5, placing the composite material plate between the clamping block 406 and the lower clamping block 308, and then rotating the threaded rod 401 in the opposite direction, so that the clamping block 406 pushes the composite material plate to clamp the composite material plate on the lower clamping block 308.

[0037] S6. Control the electric hydraulic telescopic rod 301 of the electric hydraulic auxiliary component 2 to move up and down reciprocatingly, and perform continuous bending fatigue analysis tests on the composite material plate. In this process, after the composite material plate is bent and the spring 8 is compressed, the spring 8 rebounds and the composite material plate is pushed open by the spring block 801 to prevent the composite material plate from being stuck and difficult to remove.

[0038] The present invention provides an adjustment mechanism 3. When the bending angle needs to be adjusted, the movable door 10 is opened, and then the bolt 5 of the fixing rod 304 is removed. The fixing rod 304 is supported by one hand and then rotated to adjust to a suitable position of the threaded hole 6, and the bolt 5 is installed on the threaded hole 6. The intervals of the angles formed by the threaded holes 6 are the same, so as to adjust the angle of the upper clamping block 1 303 to form different angles with the upper clamping block 2 305. The adjustment mechanism 3 can adjust the angle of the clamp, increase the experimental data of different bending angles, and facilitate experimental analysis. In addition, by providing the installation mechanism 4, when the composite material board needs to be installed, the switch 1001 can be controlled. The electric hydraulic telescopic rod body 301 is retracted, and the composite material plate is placed between the clamping block 406 and the lower clamping block 308. By rotating the threaded rod 401, the internal threaded tube 402 moves horizontally to the right, driving the clamping block 406 and the rubber block 407 to clamp the composite material plate. Then, the electric hydraulic telescopic rod body 301 is repeatedly moved vertically by controlling the switch 1001, and the composite material plate is continuously subjected to bending fatigue analysis. After the composite material plate is bent, the spring 8 is compressed, and the spring 8 rebounds, and the composite material plate is pushed open by the spring block 801 to avoid getting stuck and being difficult to remove. The mounting mechanism 4 can make the composite material plate quickly and easily fixed, and is not easy to get stuck and is easy to remove.

[0039] The parts not specifically described in the above description are all prior art, or can be implemented by prior art. Moreover, the specific implementation cases described in the present invention are only preferred implementation cases of the present invention, and are not used to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the patent scope of the present invention should be regarded as the technical scope of the present invention.

Claims

1. A composite material fatigue analysis test device, comprising a protection box (1), an electric hydraulic auxiliary component (2), a fixed platform (306), an upper clamping block and a lower clamping block (308), wherein the electric hydraulic auxiliary component (2) is arranged on the top of the protection box (1), the electric hydraulic telescopic rod (301) thereof extends downward into the protection box (1), the upper clamping block is fixed to the bottom end of the electric hydraulic telescopic rod (301), the fixed platform (306) is fixed in the protection box (1), and the lower clamping block (308) is fixed on the fixed platform (306), characterized in that: The utility model comprises a fixed plate (302), wherein the fixed plate (302) is fixed on the bottom end of the electric hydraulic telescopic rod (301) and moves synchronously with the vertical movement of the electric hydraulic telescopic rod (301), and the upper clamping block comprises an upper clamping block 1 (303) and an upper clamping block 2 (305), wherein the upper clamping block 1 (303) is rotatably arranged on the fixed plate (302), and a fixed rod (304) is fixed on the upper end of the upper clamping block 1 (303), and the fixed rod (304) is used to adjust the rotation of the upper clamping block 1 (303) relative to the fixed plate (302), and a through hole (501) is opened on the fixed rod (304), and a plurality of threaded holes are opened on the fixed plate (302) along the circumferential direction. (6), a bolt (5) is provided in the through hole (501), the bolt (5) is inserted into the through hole (501) and different threaded holes (6) and is threadably matched with the threaded holes (6), and is used to fix the upper clamping block (303) after the angle of the upper clamping block (303) is adjusted. The upper clamping block (305) is fixed on the fixing plate (302), and an angle is formed between the upper clamping block (303) and the upper clamping block (305). The upper clamping block (303) is rotated to adjust the angle between the upper clamping block (303) and the upper clamping block (305), and the top end of the lower clamping block (308) extends into the angle formed by the upper clamping block (303) and the upper clamping block (305).

2. The composite material fatigue analysis test device according to claim 1, characterized in that: The device also includes a mounting mechanism (4) located on one side of the second upper clamping block (305), the mounting mechanism (4) including an adjustment box (307), a threaded rod (401), an internally threaded sleeve (402), a slider (404) and a clamping block (406), the adjustment box (307) being fixed on the fixing platform (306), the threaded rod (401) passing through the adjustment box (307) and being rotatably connected to the adjustment box (307), the internally threaded sleeve (402) being located in the adjustment box (307) and being threadably matched with the threaded rod (401). The top of the adjustment box (307) is provided with a guide groove (405) parallel to the threaded rod (401), the slider (404) is located in the guide groove (405) and its bottom end is fixed to the internal threaded sleeve (402), the clamping block (406) is fixed to the top of the slider (404), and the threaded rod (401) is rotated to drive the slider (404) to move in the guide groove (405) to adjust the distance between the clamping block (406) and the lower clamping block (308), so as to clamp or loosen the composite board in use.

3. The composite material fatigue analysis test device according to claim 2, characterized in that: It also includes more than one rubber block (407), which is fixed on one side of the clamping block (406) close to the lower clamping block (308).

4. The composite material fatigue analysis test device according to claim 2, characterized in that: It also includes a connecting rod (403) and a fixed block (9), wherein the top end of the connecting rod (403) is fixedly connected to the slider (404), the bottom end of the connecting rod (403) is fixedly connected to the internal threaded sleeve (402), the slider (404) is located in the guide groove (405), the fixed block (9) is fixed to one end of the adjusting box (307) close to the lower clamping block (308), and the end of the threaded rod (401) located in the adjusting box (307) is rotatably connected to the fixed block (9) by a bearing.

5. The composite material fatigue analysis test device according to claim 1, characterized in that: A spring block (801) is provided on a side of the lower clamp block (308) away from the second upper clamp block (305); the spring block (801) is connected to the lower clamp block (308) by at least one spring (8); when the upper clamp block moves downward to extrude the composite plate, the composite plate extrude the spring block (801) to cause the spring (8) to contract; when the upper clamp block moves upward, the spring (8) extends to push the spring block (801) to eject the composite plate.

6. The composite material fatigue analysis test device according to claim 5, characterized in that: A groove having the same shape as the spring block (801) is provided on one side of the lower clamping block (308) where the spring block (801) is provided, and the spring (8) is located in the groove.

7. The composite material fatigue analysis test device according to claim 1, characterized in that: A fixed column (7) is fixed on the fixed plate (302), a rotating tube (701) is sleeved on the fixed column (7), and the rotating tube (701) can rotate relative to the fixed column (7). The rotating tube (701) is fixed to the upper end of the upper clamping block 1 (303) close to the upper clamping block 2 (305).

8. The composite material fatigue analysis test device according to claim 1, characterized in that: It also includes a control switch (1001), which is arranged on the top of the protection box (1) and is electrically connected to the electric hydraulic auxiliary component (2) and is used to control the movement of the electric hydraulic telescopic rod (301) of the electric hydraulic auxiliary component (2).

9. The composite material fatigue analysis test device according to claim 1, characterized in that: It also comprises a movable door (10), which is arranged at the front of the protection box (1) and is used to open or close the protection box (1).

10. A composite material fatigue analysis test method, using the composite material fatigue analysis test device according to any one of claims 1 to 9, characterized in that: The following steps are included: S1, open the movable door (10), and remove the bolt (5) on the fixing rod (304); S2, holding the fixing rod (304), and rotating the fixing rod (304) so ​​that the through hole (501) on the fixing rod (304) is aligned with the appropriate threaded hole (6) on the fixing plate (302), and then passing the bolt (5) through the through hole (501) and threading it into the threaded hole (6), thereby adjusting the angle between the upper clamping block 1 (303) and the upper clamping block 2 (305); S3, controlling the electric hydraulic telescopic rod (301) of the electric hydraulic auxiliary component (2) to move upward, thereby pulling the upper clamping block to move upward; S4, rotating the threaded rod (401) to move the clamping block (406) in a direction away from the lower clamping block (308), thereby increasing the distance between the clamping block (406) and the lower clamping block (308); S5, placing the composite material plate between the clamping block (406) and the lower clamping block (308), and then rotating the threaded rod (401) in the opposite direction, so that the clamping block (406) pushes the composite material plate to clamp the composite material plate on the lower clamping block (308); S6. Controlling the electric hydraulic telescopic rod (301) of the electric hydraulic auxiliary component (2) to move up and down reciprocatingly, and performing a continuous bending fatigue analysis test on the composite material plate. During the process, after the composite material plate is bent and the spring (8) is compressed, the spring (8) rebounds, and the composite material plate is pushed open by the spring block (801).

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