High-performance fiber filament bundle transverse high-speed impact test device

Abstract

The present invention provides a transverse high-speed impact test device for high-performance fiber filaments, which relates to the field of impact testing. The transverse high-speed impact test device includes: a clamping assembly for clamping the filament bundle; a high-speed impact assembly for impacting the filament bundle; and a launching assembly for driving the high-speed impact assembly through high-pressure gas. Among them, the launching assembly includes a launching tube and a pressurizing device. The launching tube has a launching cavity, and the pressurizing device has a pressurizing cavity. One end of the launching cavity can communicate with the pressurizing cavity, and the other end of the launching cavity forms a launching port. The extending direction of the launching tube is perpendicular to the arrangement direction of the filament bundle. The launching assembly further includes a control valve, which is located between the launching cavity and the pressurizing cavity. The control valve is used to connect the launching cavity and the pressurizing cavity when the air pressure in the pressurizing cavity reaches the target pressure value, so that the high-pressure gas drives the high-speed impact assembly in the launching cavity to shoot towards the filament bundle. This transverse high-speed impact test device can improve the accuracy of the impact test.

Description

Technical Field

[0001] The present invention relates to the field of impact testing, and in particular to a device for transverse high-speed impact testing of high-performance fiber filaments. Background Art

[0002] The bulletproof performance of composite armor mainly depends on the mechanical properties of high-performance fibers. The higher the fiber strength, the better the bulletproof effect of the armor. Therefore, a large number of scholars and industry personnel have devoted their lives to developing new high-performance fibers or improving the mechanical properties of existing high-performance fibers. However, in the initial stage of research and development, the output of high-performance fibers prepared in the laboratory is limited. If it is necessary to weave them into fabrics and then composite them into armor plates, not only a large amount of time, money and labor costs are required, but also the number of final specimens is small, and the obtained data is limited, which cannot accurately evaluate whether the fiber performance can meet the expected standards under the high-speed impact of projectiles.

[0003] There is a need for a device that can perform impact testing on yarns. The relevant testing device stretches the yarn through a Hopkinson bar, and this testing device has a low testing accuracy for the yarn. Summary of the Invention

[0004] The present invention provides a device for transverse high-speed impact testing of high-performance fiber filaments, which is used to solve the technical problem of how to improve the impact testing accuracy.

[0005] An embodiment of the present invention provides a device for transverse high-speed impact testing of high-performance fiber filaments. The device for transverse high-speed impact testing of high-performance fiber filaments includes: a clamping assembly for clamping the high-performance fiber filaments; a high-speed impact assembly for impacting the high-performance fiber filaments; a launching assembly for driving the high-speed impact assembly to impact the high-performance fiber filaments through high-pressure gas; wherein, the launching assembly includes a launching tube and a pressurizing device. The launching tube has a launching cavity, and the pressurizing device has a pressurizing cavity. One end of the launching cavity can communicate with the pressurizing cavity, and the other end of the launching cavity forms a launching port. The extending direction of the launching tube is perpendicular to the arrangement direction of the high-performance fiber filaments; the launching assembly further includes a control valve, and the control valve is located between the launching cavity and the pressurizing cavity. The control valve is used to communicate the launching cavity with the pressurizing cavity when the air pressure in the pressurizing cavity reaches a target pressure value, so that the high-pressure gas drives the high-speed impact assembly in the launching cavity to shoot towards the high-performance fiber filaments.

[0006] In some embodiments, the pressurizing cavity has an air inlet and an air outlet. The air inlet is communicated with a gas source and the air inlet has a pressurizing valve, and the air outlet has a launching valve. The control valve is a differential pressure valve;

[0007] In a state where the pressure valve is open and the exhaust valve is closed, the gas from the gas source enters the pressurization chamber through the air inlet and causes the differential pressure valve to be in the first position. In a state where the pressure valve is closed and the exhaust valve is open, the gas in the pressurization chamber is discharged through the exhaust port and causes the differential pressure valve to be in the second position. Wherein, in a state where the differential pressure valve is in the first position, the pressurization chamber is isolated from the launch chamber, and in a state where the differential pressure valve is in the second position, the pressurization chamber is in communication with the launch chamber.

[0008] In some embodiments, the high-speed impact assembly includes: a sabot, the sabot having a receiving groove, the sabot being capable of sealing the launch chamber; a projectile body, partially received in the receiving groove and detachably connected to the sabot.

[0009] In some embodiments, the sabot has fins.

[0010] In some embodiments, the projectile body includes: a receiving portion received in the receiving groove; an impact portion extending from an outer surface of the receiving portion on a side away from the sabot. In a first direction, the size of the impact portion is the same as that of the receiving portion, and in a second direction, the size of the impact portion is smaller than that of the receiving portion, wherein the first direction and the second direction are perpendicular to each other and both perpendicular to the extending direction of the impact portion.

[0011] In some embodiments, an end of the impact portion away from the receiving portion forms an arc-shaped curved surface; and / or, the outer surface of the impact portion is an uneven structure.

[0012] In some embodiments, the clamping assembly includes: a clamping frame; two wire rollers connected to the clamping frame, the axes of the two wire rollers being arranged at intervals; wherein, the wire roller has a wire groove for winding the high-performance fiber filament bundle.

[0013] In some embodiments, the wire roller is rotatably connected to the clamping frame, and the rotation axis of the wire roller coincides with the axis of the wire roller.

[0014] In some embodiments, the clamping assembly further includes: a sliding platform fixedly connected to the clamping frame; a sliding frame slidably connected to the sliding platform; wherein, the sliding direction of the sliding platform relative to the sliding frame is parallel to the axis direction of the wire roller.

[0015] In some embodiments, the lateral high-speed impact test device further includes: a speed measuring device, two speed measuring devices are arranged at intervals along the extending direction of the launch tube, and the two speed measuring devices are respectively located on both sides of the clamping assembly.

[0016] An embodiment of the present invention provides a transverse high-speed impact test device for a high-performance fiber filament bundle. The transverse high-speed impact test device includes: a clamping assembly for clamping the high-performance fiber filament bundle, a high-speed impact assembly for impacting the high-performance fiber filament bundle, and a launching assembly for driving the high-speed impact assembly to impact the high-performance fiber filament bundle through high-pressure gas. Among them, the launching assembly includes a launching tube and a pressurizing device. The launching tube has a launching chamber, and the pressurizing device has a pressurizing chamber. One end of the launching chamber is communicated with the pressurizing chamber, and the other end of the launching chamber forms a launching port. The high-speed impact assembly is located in the launching chamber and can move along the launching chamber under the action of the high-pressure gas in the pressurizing chamber and shoot out from the launching port, so as to impact the high-performance fiber filament bundle. That is, the flying direction of the high-speed impact assembly is guided by the extending direction of the launching tube, so that the high-speed impact assembly can laterally impact the high-performance fiber filament bundle, and thus can more accurately simulate the impact direction of a real bullet impacting the high-performance fiber filament bundle, improving the accuracy of the impact test. At the same time, the launching assembly further includes a control valve. The control valve is located between the launching chamber and the pressurizing chamber and is used to communicate the launching chamber with the pressurizing chamber when the air pressure in the pressurizing chamber reaches the target pressure value. Specifically, during the process of gradually pressurizing the pressurizing chamber, the launching chamber and the pressurizing chamber are isolated by the control valve, and the launching chamber and the pressurizing chamber are communicated after the air pressure in the pressurizing chamber reaches the target air pressure, so that the high-speed impact assembly shoots out under the drive of the high-pressure gas at the target pressure. That is, the pressure of the high-pressure gas driving the high-speed impact assembly to shoot out is controlled by the control valve, so as to control the shooting speed of the high-speed impact assembly, further improving the accuracy of the impact test. This device greatly reduces the R & D cost of high-performance bulletproof fibers, shortens the R & D cycle, and accelerates the development of the fiber protection armor field in China. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of a transverse high-speed impact test device for a high-performance fiber filament bundle provided by an embodiment of the present invention;

[0018] Figure 2 FIG. is a schematic structural diagram of a launching assembly in the transverse high-speed impact test device for a high-performance fiber filament bundle provided by an embodiment of the present invention;

[0019] Figure 3 FIG. is a schematic structural diagram of another launching assembly in the transverse high-speed impact test device for a high-performance fiber filament bundle provided by an embodiment of the present invention;

[0020] Figure 4 FIG. is an exploded view of a high-speed impact assembly in the transverse high-speed impact test device for a high-performance fiber filament bundle provided by an embodiment of the present invention;

[0021] Figure 5Schematic structural diagram of a clamping assembly in a high-performance fiber filament bundle transverse high-speed impact test device provided by an embodiment of the present invention;

[0022] Figure 6 Schematic structural diagram of another high-performance fiber filament bundle transverse high-speed impact test device provided by an embodiment of the present invention.

[0023] Description of reference numerals

[0024] 1. Transverse high-speed impact test device; 10. Clamping assembly; 11. Clamping frame; 12. Thread roller; 121. Thread groove; 13. Sliding platform; 14. Sliding frame; 20. High-speed impact assembly; 21. Projectile carrier; 211. Accommodating groove; 212. Tail fin; 22. Projectile body; 221. Accommodating part; 222. Impact part; 223. Arc-shaped curved surface; 30. Launching assembly; 31. Launching tube; 311. Launching cavity; 312. Launching port; 32. Pressurizing device; 321. Pressurizing cavity; 322. Air inlet; 323. Exhaust port; 324. Pressurizing valve; 325. Launching valve; 33. Control valve; 331. Valve body; 332. Air chamber; 333. Vent pipe; 334. First ventilation port; 335. Second ventilation port; 40. Velocity measuring device; 50. Projectile recovery structure. Detailed implementation manners

[0025] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] For each specific technical feature in each of the various embodiments described in the detailed implementation manners, various combinations can be made without conflict. For example, different embodiments can be formed by combining different specific technical features. To avoid unnecessary repetition, various possible combination methods of each specific technical feature in the present invention will not be described separately.

[0027] Here, it should also be noted that in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present invention are shown in the drawings, while other details less related to the present invention are omitted.

[0028] In addition, it should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or apparatus 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 apparatus. In the following description, the terms "first", "second", etc. are only used to distinguish different objects and do not indicate any identity or relationship between the objects. It should be understood that the orientation descriptions such as "above", "below", "inside", "outside", etc. represent the orientations in the normal use state.

[0029] In the following specific embodiments, the high-speed transverse impact test device for high-performance fiber filaments can be used to test the ballistic performance of any high-performance fiber. The high-performance fiber can be poly(p-phenylene terephthalamide) (Kevlar), wholly aromatic polyester, polybenzobisoxazole or carbon fiber. The high-speed transverse impact test device is used to perform a high-speed transverse impact on the high-performance fiber filaments, that is, the impact test is used to apply an impact force perpendicular to the extension direction of the high-performance fiber filaments to the high-performance fiber filaments, and the impact force is relatively large. The structure and function of the high-speed transverse impact test device for high-performance fiber filaments will be exemplarily described below in conjunction with each embodiment.

[0030] In some embodiments, such as Figure 1As shown in the figure, the high-performance fiber filament bundle transverse high-speed impact test device 1 includes: a clamping assembly 10, a high-speed impact assembly 20, and a launching assembly 30. The clamping assembly 10 is used to clamp the high-performance fiber filament bundle 2. Specifically, the clamping assembly 10 is used to fix the high-performance fiber filament bundle 2 and straighten the high-performance fiber filament bundle 2 to facilitate the application of a transverse impact force to the high-performance fiber filament bundle 2; the high-speed impact assembly 20 is used to impact the high-performance fiber filament bundle and simulate the impact of a bullet on the high-performance fiber filament bundle; the launching assembly 30 is used to drive the high-speed impact assembly 20 to impact the high-performance fiber filament bundle 2 through high-pressure gas. The launching assembly 30 can control the launching direction of the high-speed impact assembly 20, so that the high-speed impact assembly 20 can apply a transverse impact force to the high-performance fiber filament bundle 2. Compared with applying a tensile force to the high-performance fiber filament bundle through a stretching device, the transverse impact force applied by the high-speed impact assembly 20 to the high-performance fiber filament bundle is more consistent with the actual force condition when the high-performance fiber filament bundle 2 is impacted by a bullet, thereby making the accuracy of the impact test higher. Specifically, the Hopkinson bar exerts a tensile effect on the filament along the filament axis, and the filament is only subjected to the tensile effect of the Hopkins bar; in reality, the projectile impacts along the radial direction of the filament, that is, the projectile makes a transverse impact on the filament, and the filament is subjected to the coupling effect of shear stress and tensile stress at the impact point, and its stress state is more complex than axial tension. Moreover, the launching assembly 30 can also control the launching speed of the high-speed impact assembly 20 by controlling the air pressure of the high-pressure gas, so as to control the magnitude of the transverse impact force applied by the high-speed impact assembly 20 to the high-performance fiber filament bundle 2, thereby further improving the accuracy of the impact test. The following will be combined with Figure 2 to illustrate the structure of the launching assembly 30 and the principles of controlling the launching direction of the high-speed impact assembly 20 and controlling the air pressure magnitude. As Figure 2As shown, the launching assembly 30 includes a launching tube 31 and a pressurizing device 32. The launching tube 31 has a launching cavity 311 therein, and the pressurizing device 32 has a pressurizing cavity 321 therein. One end of the launching cavity 311 communicates with the pressurizing cavity 321, and the other end of the launching cavity 311 forms a launching port 312. The extending direction of the launching tube 31 is perpendicular to the extending direction of the high-performance fiber filament bundle 2. The high-speed impact assembly 20 is located in the launching cavity 311 and can move along the launching cavity 311 under the action of the high-pressure gas in the pressurizing cavity 321 and shoot out from the launching port 312, so as to impact the high-performance fiber filament bundle 2. That is, the flying direction of the high-speed impact assembly 20 is guided through the extending direction of the launching tube 31, so that the high-speed impact assembly 20 can laterally impact the high-performance fiber filament bundle 2. At the same time, the launching assembly 30 further includes a control valve 33. The control valve 33 is located between the launching cavity 311 and the pressurizing cavity 321. The control valve 33 is used to communicate the launching cavity 311 with the pressurizing cavity 321 when the air pressure in the pressurizing cavity 321 reaches the target pressure value, so that the high-pressure gas drives the high-speed impact assembly 20 in the launching cavity 311 to shoot towards the high-performance fiber filament bundle 2. Specifically, during the process of gradually pressurizing the pressurizing cavity 321, the launching cavity 311 is isolated from the pressurizing cavity 321 through the control valve 33, and the launching cavity 311 is communicated with the pressurizing cavity 321 after the air pressure in the pressurizing cavity 321 reaches the target air pressure, so that the high-speed impact assembly 20 shoots out under the drive of the high-pressure gas at the target pressure. That is, the pressure of the high-pressure gas driving the high-speed impact assembly 20 to shoot out is controlled through the control valve 33, so as to control the shooting speed of the high-speed impact assembly 20, and further improve the accuracy of the impact test. It should be noted that different from fabric or composite targets, the strength of the filament bundle is relatively low, and the energy absorption effect on the kinetic energy of the projectile is limited. If the hitting speeds of the high-speed impact assembly 20 in each experiment are too discrete, it is not conducive to evaluating the dynamic mechanical properties of the fiber. By precisely controlling the launching speed of the high-speed impact assembly 20 and controlling the shooting speed of the high-speed impact assembly 20, the distribution range of the hitting speeds of the high-speed impact assembly 20 can be narrowed, so that the test results are more accurate.

[0031] Moreover, the gas can be pressurized to a relatively high air pressure level by pressurizing in the pressurizing cavity 321, so as to be able to drive the high-speed impact assembly 20 to impact the high-performance fiber filament bundle at a high speed. And by arranging the launching tube 31, the high-pressure gas can apply air pressure to the high-speed impact assembly 20 in the launching tube 31 for a sufficient long time, that is, the high-speed impact assembly 20 has a sufficient long acceleration time, further improving the speed of the high-speed impact assembly 20 impacting the high-performance fiber filament bundle, so that the strain of the high-performance fiber filament bundle is more in line with the actual situation. Specifically, the strain rate that a Hopkinson bar can achieve is generally in the range of 10 2 ~10 3 s -1(the linear strain occurring per unit time), far from reaching the strain rate (10 4 ~10 6 s -1 ) that the fibers undergo during the penetration of the projectile. The high-speed impact assembly 20 provided in this embodiment can perform a high-speed lateral impact on the high-performance fiber filament bundle under the drive of high-pressure gas, so that the strain rate of the high-performance fiber filament bundle reaches 10 4 ~10 6 s -1 .

[0032] The embodiment of the present invention provides a high-speed lateral impact test device for a high-performance fiber filament bundle. The high-speed lateral impact test device includes: a clamping assembly for clamping the high-performance fiber filament bundle, a high-speed impact assembly for impacting the high-performance fiber filament bundle, and a launching assembly for driving the high-speed impact assembly to impact the high-performance fiber filament bundle through high-pressure gas. Among them, the launching assembly includes a launching tube and a pressurizing device. The launching tube has a launching cavity, and the pressurizing device has a pressurizing cavity. One end of the launching cavity is communicated with the pressurizing cavity, and the other end of the launching cavity forms a launching port. The high-speed impact assembly is located in the launching cavity and can move along the launching cavity under the action of the high-pressure gas in the pressurizing cavity and shoot out from the launching port, so as to impact the high-performance fiber filament bundle. That is, the flying direction of the high-speed impact assembly is guided by the extending direction of the launching tube, so that the high-speed impact assembly can laterally impact the high-performance fiber filament bundle, and further can more accurately simulate the impact direction of a real bullet impacting the high-performance fiber filament bundle, improving the accuracy of the impact test; at the same time, the launching assembly further includes a control valve. The control valve is located between the launching cavity and the pressurizing cavity and is used to communicate the launching cavity with the pressurizing cavity when the air pressure in the pressurizing cavity reaches the target pressure value. Specifically, during the process of gradually pressurizing the pressurizing cavity, the launching cavity and the pressurizing cavity are isolated through the control valve, and the launching cavity and the pressurizing cavity are communicated after the air pressure in the pressurizing cavity reaches the target air pressure, so that the high-speed impact assembly shoots out under the drive of the high-pressure gas at the target pressure. That is, the pressure of the high-pressure gas driving the high-speed impact assembly to shoot out is controlled through the control valve, so as to control the shooting speed of the high-speed impact assembly, further improving the accuracy of the impact test.

[0033] In some embodiments, as Figure 2 shown, after the control valve 33 is opened, the high-pressure gas in the pressurizing cavity 321 enters the launching cavity 311 and drives the high-speed impact assembly 20 in the launching cavity 311 to shoot out. And after the high-speed impact assembly 20 shoots out, the high-pressure gas in the launching cavity 311 is discharged from the launching port 312 out of the launching cavity 311.

[0034] In some embodiments, as Figure 3As shown, the pressurizing chamber 321 has an air inlet 322 and an air outlet 323. The air inlet 322 is communicated with the air source and the air inlet is provided with a pressurizing valve 324. The air outlet 323 is provided with a launching valve 325. The control valve 33 is a differential pressure valve. When the pressurizing valve 324 is opened and the launching valve 325 is closed, the gas in the air source enters the pressurizing chamber 321 through the air inlet 322 to gradually increase the air pressure in the pressurizing chamber 321. At the same time, the high-pressure gas in the pressurizing chamber 321 presses the differential pressure valve (control valve 33) to the first position. When the differential pressure valve (control valve 33) is in the first position, the pressurizing chamber 321 is isolated from the launching chamber 311, so that the gas in the pressurizing chamber 321 will not leak into the launching chamber 311 and the air pressure in the pressurizing chamber 321 can be reliably increased step by step. When the pressurizing valve 324 is closed and the launching valve 325 is opened, the gas in the pressurizing chamber 321 flows out at high speed through the launching valve 325. At this time, the air pressure exerted on the differential pressure valve (control valve 33) by the fluid in the pressurizing chamber 321 is less than the air pressure exerted on the differential pressure valve (control valve 33) by the gas in the launching chamber 311, so that the differential pressure valve (control valve 33) is pushed to the second position (the differential pressure valve at the second position is indicated by a double-dashed line). When the differential pressure valve (control valve 33) is in the second position, the launching chamber 311 is communicated with the pressurizing chamber 321, so that the high-pressure gas in the pressurizing chamber 321 can enter the launching chamber 311 and drive the high-speed impact assembly 20 in the launching chamber 311 to shoot out.

[0035] Optionally, in order to make the differential pressure valve (control valve 33) move more reliably between the first position and the second position under the action of the differential pressure, the differential pressure valve can also be provided with a pressure chamber so that the air pressure in the pressurizing chamber 321 can directly act on the differential pressure valve. The following combines Figure 3 to make an exemplary description of the specific structure of the differential pressure valve, such as Figure 3As shown in the figure, the differential pressure valve (control valve 33) includes: a valve body 331, an air chamber 332, and a ventilation pipe 333. The air chamber 332 is located within the pressurized chamber 321 and is connected to the air inlet 322 and the exhaust port 323 through the ventilation pipe 333. The air chamber 332 has a first ventilation port 334 and a second ventilation port 335. The air chamber 332 is connected to the ventilation pipe 333 through the first ventilation port 334, and the air chamber 332 is connected to the pressurized chamber 321 through the second ventilation port 335. The valve body 331 is located within the air chamber 332. In the state where the pressurizing valve 324 is open and the launching valve 325 is closed, the gas from the gas source enters the air chamber 332 through the ventilation pipe 333 and the first ventilation port 334 and then enters the pressurized chamber 321 through the second ventilation port 335. At the same time, the gas entering the air chamber 332 presses the valve body 331 towards the first position, thereby isolating the pressurized chamber 321 and the launching chamber 311; in the state where the pressurizing valve 324 is closed and the launching valve 325 is open, the gas within the air chamber 332 rapidly flows from the first ventilation port 334 and the ventilation pipe 333 towards the exhaust port 323. At this time, the air pressure within the air chamber 332 is lower than the air pressure within the launching chamber 311, and the valve body 331 moves to the second position under the action of the pressure difference, thereby connecting the pressurized chamber 321 and the launching chamber 311. At this time, a part of the gas within the pressurized chamber 321 directly enters the launching chamber 311 to drive the high-speed impact assembly 20 to launch, and another part enters the air chamber 332 through the second ventilation port 335 and then flows out through the exhaust port 323. It should be noted that the size of the first ventilation port 334 is larger than the size of the second ventilation port 335, so that the gas outlet speed of the air chamber 332 is greater than the gas inlet speed, thereby continuously keeping the air pressure within the air chamber 332 lower than the air pressure within the launching chamber 311, and further enabling the valve body 331 to be reliably held in the second position.

[0036] In some embodiments, as Figure 4 shown, the high-speed impact assembly 20 includes a sabot 21 and a projectile 22. The sabot 21 has a receiving groove 211, and a part of the projectile 22 is received within the receiving groove 211, and the sabot 21 and the projectile 22 are detachably connected. Among them, the sabot 21 can block the launching chamber 311. It can be understood that the sabot 21 forms an interference fit with the launching chamber 311. During the process of high-pressure gas acting on Figure 2 the high-speed impact assembly 20 within the launching chamber 311, the high-pressure gas can all act on the sabot 21 and will not leak through the gap between the sabot 21 and the inner wall of the launching chamber 311, improving the driving efficiency of the high-pressure gas to drive the high-speed impact assembly 20; at the same time, since the projectile 22 and the sabot 21 form a separable structure through the receiving groove 211, the size of the sabot 21 can be adjusted according to the size of the launching chamber 311, so that the high-speed impact assembly 20 can be applicable to launching tubes 31 of different sizes. Moreover, adjusting the size of the sabot 21 can also change the degree of interference fit formed between the sabot 21 and the launching chamber 311, thereby finely adjusting the launching air pressure of the high-speed impact assembly 20. Optionally, as Figure 4As shown, the sabot 21 has fins 212. The fins 212 can make the flight trajectory of the high-speed impact component 20 more stable through airflow disturbance during the flight of the high-speed impact component 20.

[0037] In some embodiments, as Figure 4 shown, the projectile body 22 includes a receiving portion 221 and an impact portion 222. The impact portion 222 is received in the receiving groove 211, that is, the shape and size of the impact portion 222 correspond to those of the receiving groove 211 to form an interference fit between the impact portion 222 and the receiving groove 211, so that the projectile body 22 can be reliably connected to the sabot 21; the impact portion 222 protrudes from the outer surface of the receiving portion 221 on the side away from the sabot 21 to form an impact boss for impacting the high-performance fiber filament bundle. In the first direction (the first direction is as shown by the solid arrow in Figure 4 ), the size of the impact portion 222 is the same as that of the receiving portion 222. In the second direction (the second direction is as shown by the dashed arrow in Figure 4 ), the size of the impact portion 222 is smaller than that of the receiving portion 221. Among them, the first direction and the second direction are perpendicular to each other and both are perpendicular to the extension direction of the impact portion 222. It can be understood that the impact portion 222 forms a flat protrusion. In the first direction, the size of the impact portion 222 is fully utilized to make the impact portion 222 have a sufficient width size, so as to increase the impact area between the impact portion 222 and the high-performance fiber filament bundle and improve the possibility that the impact portion 222 can hit the high-performance fiber filament bundle. At the same time, the impact portion 222 is narrowed in the second direction, thereby reducing the air resistance of the impact portion 222 during flight.

[0038] Optionally, as Figure 4 shown, the end of the impact portion 222 away from the receiving portion 221 forms an arc-shaped curved surface 223. The arc-shaped curved surface 223 is used to directly contact the high-performance fiber filament bundle when impacting the high-performance fiber filament bundle. By forming the contact surface into an arc-shaped curved surface 223, the shearing action on the high-performance fiber filament bundle caused by the contact of the acute-edge or sharp-corner with the high-performance fiber filament bundle is reduced, and the stress state during the impact process between the impact portion 222 and the high-performance fiber filament bundle is simplified. Moreover, the arc-shaped curved surface 223 can also reduce the air resistance of the impact portion 222 during flight.

[0039] Optionally, as Figure 4As shown, the outer surface of the impact portion 222 is formed with an uneven structure, that is, the outer surface of the impact portion 222 is not a completely smooth surface, so as to increase the frictional force when the impact portion 222 contacts the high-performance fiber filament bundle, thereby reducing the risk of slippage between the impact portion 222 and the high-performance fiber filament bundle, and simplifying the stress state of the high-performance fiber filament bundle. Specifically, the attenuation of the kinetic energy of the high-speed impact component is largely determined by the fracture mechanism of the high-performance fiber filament bundle, and the fracture mechanism of the high-performance fiber filament bundle is controlled by various factors. Therefore, during the projectile-target interaction process, as many influencing factors as possible are excluded to stabilize the stress state of the yarn, which can improve the data repetition rate and help analyze the performance of the yarn. By simplifying the stress state of the high-performance fiber filament bundle, the data repetition rate can be improved and it helps analyze the performance of the yarn. Among them, the uneven structure of the outer surface of the impact portion 222 can be formed in any way. Exemplarily, a plurality of spaced grooves can be formed on the outer surface of the impact portion 222 by machining. Exemplarily, the impact portion 222 can be oxidized to form an oxide layer on the outer surface of the impact portion 222, so that the oxide layer forms an uneven structure. In some embodiments, as Figure 5 As shown, the clamping assembly 10 includes: a clamping frame 11 and thread rollers 12. The two thread rollers 12 are connected to the clamping frame 11, and the axes of the two thread rollers 12 are arranged at intervals. By connecting the end portions of the high-performance fiber filament bundle to the two thread rollers 12 respectively, the fixation of the high-performance fiber filament bundle can be realized and the high-performance fiber filament bundle can be straightened, so as to facilitate the impact test of the high-performance fiber filament bundle. Among them, the thread roller 12 has a thread groove 121 for winding the high-performance fiber filament bundle. By winding the end portion of the high-performance fiber filament bundle into the thread groove 121, the end portion of the high-performance fiber filament bundle can be fixed by the frictional force between different parts of the high-performance fiber filament bundle and the frictional force between the high-performance fiber filament bundle and the inner wall of the thread groove 121, so as to reliably fix the high-performance fiber filament bundle to the thread roller 12.

[0040] Optionally, as Figure 5 As shown, the thread roller 12 is rotatably connected to the clamping frame 11, and the axis of rotation of the thread roller 12 coincides with the axis of the thread roller 12. By rotating the thread roller 12, the tension degree of the high-performance fiber filament bundle can be adjusted, so that the impact resistance performance of the high-performance fiber filament bundle under different tension degrees can be tested.

[0041] In some embodiments, as Figure 5As shown, the clamping assembly 10 further includes a sliding platform 13 and a sliding frame 14. The clamping frame 11 is fixed to the sliding platform 13. The sliding platform 13 is slidably connected to the sliding frame 14. The sliding platform 13 can drive the clamping frame 11 and the wire roller 12 to slide relative to the sliding frame 14. Among them, the sliding direction of the sliding platform 13 relative to the sliding frame 14 is parallel to the axial direction of the wire roller 12. By sliding the sliding platform 13 relative to the sliding frame 14, the relative position relationship between the wire roller 12 and the high-performance fiber filament bundle and the emission tube 11 can be adjusted, so that the positions of the sliding platform 13 and the high-performance fiber filament bundle can be adjusted according to the movement trajectory of the high-speed impact assembly 20, thereby improving the hit rate of the high-speed impact assembly 20. Optionally, the sliding platform 13 and the sliding frame 14 are connected by an adjustment structure, and the adjustment structure can drive the sliding platform 13 to slide relative to the sliding frame 14. This connection structure can be a threaded structure or a worm and worm gear structure, so that the position of the sliding platform 13 can be accurately adjusted.

[0042] In some embodiments, as Figure 6 shown, the lateral high-speed impact test device 1 further includes a speed measuring device 40. Two speed measuring devices 40 are arranged at intervals along the extension direction of the emission tube 31, and the two speed measuring devices 40 are respectively located on both sides of the clamping assembly 10. Through the two speed measuring devices 40, the speed of the high-speed impact assembly 20 before and after hitting the high-performance fiber filament bundle 2 can be obtained. The impact resistance of the high-performance fiber filament bundle 2 can be obtained through the speed difference before and after impact. The speed measuring device 40 can be an infrared speed measuring device. The process and principle of obtaining the impact resistance of the high-performance fiber filament bundle 2 will be exemplarily described below in combination with the test process.

[0043] The laboratory temperature is 24 degrees and the humidity is 20%. A first-stage light gas gun is used for the ballistic experiment. The gun barrel has no rifling. The inner diameter of the emission tube is 14 mm and the length is 1.8 m. High-pressure nitrogen is used for pressurization. The projectile sled and the projectile are accelerated in the gun barrel to control the impact speed within the range of 0-300 m / s. The impact resistance of the high-performance fiber filament bundle 2 is calculated by the following formula:

[0044]

[0045] Among them, Δ E is the kinetic energy lost by the high-speed impact assembly during penetration, m is the mass of the projectile, v 1 and v$v_0$ and $v_1$ are respectively the impact velocity and the residual velocity of the projectile. The greater the kinetic energy loss during the penetration of the high-speed impact component, the better the effect of the high-performance fiber filament bundle 2 absorbing the impact, that is, the stronger the impact resistance of the high-performance fiber filament bundle 2. It should be noted that by arranging the velocity measuring device 40 on both sides close to the high-performance fiber filament bundle 2, the velocities of the high-speed impact component 20 before and after impacting the high-performance fiber filament bundle 2 can be directly measured, reducing the influence of air resistance during the flight of the high-speed impact component 20 on the calculation of the impact resistance of the high-performance fiber filament bundle 2.

[0046] Optionally, as Figure 6 shown, the lateral high-speed impact test device 1 further includes a projectile recovery structure 50. The projectile recovery structure 50 is located on the side of the high-performance fiber filament bundle 2 away from the launch tube 31. The high-speed impact component 20 can stop moving after the projectile recovery structure 50, facilitating the recovery of the high-speed impact component 20 and reducing the risk of potential safety hazards to surrounding personnel caused by the high-speed impact component 20. The projectile recovery structure 50 can be made of vulcanized rubber.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A high-performance fiber filament bundle transverse high-speed impact testing device, characterized in that, The transverse high-speed impact test device includes: A clamping assembly for clamping the high-performance fiber filament bundle; A high-speed impact assembly for impacting the high-performance fiber filament bundle; A launching assembly for driving the high-speed impact assembly to impact the high-performance fiber filament bundle through high-pressure gas; Wherein, the launching assembly includes a launching tube and a pressurizing device. The launching tube has a launching cavity, and the pressurizing device has a pressurizing cavity. One end of the launching cavity can communicate with the pressurizing cavity, and the other end of the launching cavity forms a launching port. The extending direction of the launching tube is perpendicular to the arrangement direction of the high-performance fiber filament bundle. The pressurizing cavity has an air inlet and an exhaust port. The air inlet has a pressurizing valve, and the exhaust port has a launching valve; The launching assembly includes a valve body, an air chamber, and a ventilation pipe. The valve body is located in the air chamber, the air chamber is located in the pressurizing cavity. The air chamber has a first ventilation port and a second ventilation port. The second ventilation port communicates the pressurizing cavity with the air chamber, and the first ventilation port communicates the air chamber with the ventilation pipe. The ventilation pipe communicates with the exhaust port and the air inlet. The size of the first ventilation port is larger than that of the second ventilation port; The high-speed impact assembly has an impact portion for contacting the high-performance fiber filament bundle, and the outer surface of the impact portion is an uneven structure.

2. The lateral high-speed impact test device according to claim 1, characterized in that, The high-speed impact assembly includes: A projectile holder having a receiving groove, and the projectile holder can block the launching cavity; A projectile, partially received in the receiving groove and detachably connected to the projectile holder.

3. The transverse high-speed impact test device according to claim 2, wherein, The projectile holder has tail fins.

4. The lateral high-speed impact testing device according to claim 2, characterized in that, The projectile includes: A receiving portion received in the receiving groove; The impact portion extends from the outer surface of the receiving portion away from the projectile holder. In the first direction, the size of the impact portion is the same as that of the receiving portion. In the second direction, the size of the impact portion is smaller than that of the receiving portion, wherein the first direction and the second direction are perpendicular to each other and both are perpendicular to the extending direction of the impact portion.

5. The lateral high-speed impact testing device according to claim 4, characterized in that, The end of the impact portion away from the receiving portion forms an arc-shaped curved surface.

6. The transverse high-speed impact test device according to claim 1, characterized in that The clamping assembly includes: A clamping frame; Thread rollers, two of the thread rollers are connected to the clamping frame, and the axes of the two thread rollers are arranged at intervals; Wherein, the thread roller has a thread groove for winding the high-performance fiber filament bundle.

7. The lateral high-speed impact test device according to claim 6, wherein, The thread roller is rotatably connected to the clamping frame, and the rotation axis of the thread roller coincides with the axis of the thread roller.

8. The lateral high-speed impact test device according to claim 6 or 7, characterized in that, The clamping assembly further includes: A sliding platform fixedly connected to the clamping frame; A sliding frame slidably connected to the sliding platform; Wherein, the sliding direction of the sliding platform relative to the sliding frame is parallel to the axis direction of the thread roller.

9. The lateral high-speed impact test device according to claim 1, characterized in that, The transverse high-speed impact test device further includes: A speed measuring device, two speed measuring devices are arranged at intervals along the extending direction of the launching tube, and the two speed measuring devices are respectively located on both sides of the clamping assembly.

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