A hopkinson-based triaxial impact test loading control device

Abstract

The utility model belongs to the technical field of mechanical test equipment, and we propose a kind of triaxial impact test loading control device based on Hopkinson, including machine case, machine case is provided with gas container box, test box and tail box;The gas container box is arranged at the left side of test box, and the pressurized gas cylinder and air jet pump are arranged in the gas container box;The right side of gas container box is equipped with launching tube, and punch is arranged in launching tube;Launching tube is inserted in the inner cavity of test box to the right;Track and test assembly are arranged in the inner cavity of test box, and test assembly includes abutting induction rod, clamping seat, input rod, three-jaw chuck, chuck and test sample piece;Test assembly is located above track;The input rod is clamped in the middle of three-jaw chuck;The hydraulic chuck of telescopic rod of moving seat and sliding seat is respectively applied axial pre-tightening force and radial dynamic load in this scheme, realizes the synergic effect of axial impact and radial constraint, and accurately simulates the triaxial stress state of material under complex working condition.

Description

Technical Field

[0001] This utility model relates to the field of mechanical testing equipment technology, specifically a Hopkinson-based triaxial impact test loading control device. Background Technology

[0002] In the field of dynamic mechanical property research of materials, the Hopkinson bar (SHPB) technique is a classic method for determining the mechanical behavior of materials under high strain rates. However, traditional devices often apply multi-directional loads through manual adjustment or step-by-step loading, making it difficult to ensure the synchronicity and dynamic coordination of axial and radial loads, resulting in significant deviations between experimental results and actual working conditions. The clamping and load adjustment of the specimen after installation rely on manual operation, which poses high operational risks (such as high-pressure gas leakage, accidental injury from impact loads), poor test repeatability (requiring frequent machine opening when adjusting the specimen), and potential safety hazards due to manual intervention. Utility Model Content

[0003] The purpose of this invention is to provide a Hopkinson-based triaxial impact test loading control device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a Hopkinson-based triaxial impact test loading control device, comprising a chassis, wherein the chassis is provided with a gas container box, a test chamber and a tail box;

[0005] The gas container box is located on the left side of the test chamber, and a pressurized gas cylinder and a jet pump are installed inside the gas container box; a launching tube is installed on the right side of the gas container box, and a punch is installed inside the launching tube; the launching tube is inserted into the inner cavity of the test chamber to the right.

[0006] The test chamber contains a track and a test assembly. The test assembly includes a contact sensing rod, a clamping seat, an input rod, a three-jaw chuck, a chuck, and a sample. The test assembly is located above the track. The input rod is held in the middle of the three-jaw chuck, and the left end of the input rod corresponds to the transmitting tube. The sample is installed in the middle of the clamping seat.

[0007] The three-jaw chuck is equipped with a chuck seat on the left side; a movable seat is provided on the right side of the abutting sensing rod, the movable seat is slidably installed on the right side of the track, and a drive vehicle is installed inside the movable seat; telescopic rods are symmetrically arranged at the bottom of the movable seat, and the telescopic rods are connected to the clamping seat to the left.

[0008] Preferably, the transmitting tube is a transparent tube, and a speed measuring instrument is provided on the rear side of the transmitting tube.

[0009] Preferably, the left end of the sample abuts against the right end of the input rod; the abutment sensing rod abuts against the right end of the sample; and a stress sensor is installed on the abutment sensing rod.

[0010] Preferably, a side slide bar is provided on the front side of the track, and a sliding seat is slidably mounted on the side slide bar. A hydraulic rod is provided on the sliding seat, and the sliding seat is moved by the hydraulic rod. An outwardly extending extension rod is provided on the side of the sliding seat close to the sample. A clamp is installed at the end of the extension rod, and a sensing plate is installed on the clamp. The clamp is a hydraulic clamp, which clamps the sensing plate on the sample when it retracts, and the clamping position is changed by moving the sliding seat.

[0011] Preferably, the clamping seat is disposed between the chuck seat and the movable seat, and the bottom of the clamping seat is slidably sleeved on the track; and clamping seat locking clips are symmetrically arranged on both sides of the clamping seat, and the clamping seat locking clips clamp and fix the sample piece inward.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This scheme utilizes the telescopic rod of the moving seat and the hydraulic clamp of the sliding seat to apply axial preload and radial dynamic load respectively, thereby achieving the synergistic effect of axial impact and radial constraint, and accurately simulating the triaxial stress state of materials under complex working conditions.

[0014] The speedometer and stress sensor provide real-time feedback data, which, combined with the closed-loop control of the mechanical drive system, can dynamically adjust the loading rate and amplitude of loads in each direction to ensure the synchronization and matching of multi-directional stresses.

[0015] All loading and adjustment processes are remotely operated by mechanical structures such as drive vehicles and hydraulic rods, avoiding the risks of human operation, ensuring the safety and repeatability of the test, and achieving flexibility in adjustment. Attached Figure Description

[0016] Figure 1 This is a front view of the present utility model;

[0017] Figure 2 This is a schematic diagram of the sample assembly of this utility model;

[0018] Figure 3 This utility model Figure 2 Enlarged view of a specific area.

[0019] In the diagram: 1. Chassis, 2. Gas container box, 3. Launch tube, 4. Punch, 5. Speed ​​meter, 6. Test chamber, 7. Tail box, 8. Moving seat, 9. Contact sensing rod, 10. Clamping seat, 11. Clamping seat locking clamp, 12. Input rod, 13. Chuck seat, 14. Three-jaw chuck, 15. Sliding seat, 16. Extension rod, 17. Clamp, 18. Telescopic rod, 19. Sample piece. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example

[0022] Please see Figure 1-3 The present invention provides the following technical solution:

[0023] A Hopkinson-based triaxial impact test loading control device includes a housing 1, which is equipped with a gas container 2, a test chamber 6, and a tail chamber 7.

[0024] Gas container 2 is located on the left side of test chamber 6. Gas container 2 contains a pressurized gas cylinder and a jet pump. Gas container 2 is installed on the right side of the gas container 2. A launch tube 3 is installed inside the launch tube 3. A punch 4 is installed inside the launch tube 3.

[0025] The transmitting tube 3 is a transparent tube, and a speed measuring device 5 is installed on the rear side of the transmitting tube 3;

[0026] The transmitting tube 3 is inserted into the inner cavity of the test chamber 6 to the right; the inner cavity of the test chamber 6 is equipped with a track and a test assembly, which includes an abutment sensing rod 9, a clamping seat 10, an input rod 12, a three-jaw chuck 14, a chuck 17, and a sample piece 19; the test assembly is located above the track;

[0027] The middle clamp of the three-jaw chuck 14 holds the input rod 12, and the left end of the input rod 12 corresponds to the transmitter tube 3; the middle of the clamping seat 10 is equipped with a sample piece 19, and the left end of the sample piece 19 abuts against the right end of the input rod 12; the abutment sensing rod 9 abuts against the right end of the sample piece 19; a stress sensor is installed on the abutment sensing rod 9.

[0028] The three-jaw chuck 14 has a chuck seat 13 installed on its left side, and the chuck seat 13 is fixedly set at the left end of the track.

[0029] A movable seat 8 is provided on the right side of the abutting sensing rod 9. The movable seat 8 is slidably installed on the right side of the track, and a drive vehicle is installed inside the movable seat 8. The drive vehicle provides displacement power for the movable seat 8. Telescopic rods 18 are symmetrically arranged at the bottom of the movable seat 8. The telescopic rods 18 are connected to the clamping seat 10 to the left. When the telescopic rods 18 extend or retract, they drive the clamping seat 10 to move, changing the relative position of the clamping seat 10.

[0030] The clamping seat 10 is disposed between the chuck seat 13 and the movable seat 8, and the bottom of the clamping seat 10 is slidably sleeved on the track; and clamping seat locking clips 11 are symmetrically arranged on both sides of the clamping seat 10, and the clamping seat locking clips 11 clamp and fix the sample piece 19 inward.

[0031] A side slide bar is provided on the front side of the track, and a sliding seat 15 is slidably installed on the side slide bar. A hydraulic rod is provided on the sliding seat 15, and the sliding seat 15 is driven to move through the hydraulic rod.

[0032] An outwardly extending extension rod 16 is provided on the side of the sliding seat 15 near the sample piece 19. A chuck 17 is installed at the end of the extension rod 16. A sensing plate is installed on the chuck 17. The chuck 17 is a hydraulic chuck. When it retracts, it clamps the sensing plate on the sample piece 19 and changes the clamping position by the displacement of the sliding seat 15.

[0033] After installing the sample piece 19, all subsequent adjustments are performed mechanically, eliminating the risks associated with manual operation.

[0034] Working principle:

[0035] The pressurized gas cylinder and jet pump in the gas container 2 release high-pressure gas into the launch tube 3, which pushes the punch 4 to move at high speed to the right along the launch tube 3.

[0036] The speed measuring instrument 5 on the back of the transparent emission tube 3 monitors the speed of the punch 4 in real time and adjusts the gas pressure through feedback to ensure that the punch 4 hits the left end of the input rod 12 at a preset speed, generating a one-dimensional stress wave.

[0037] After the punch impacts the input rod 12, the stress wave is transmitted through the input rod 12 to the left end of the specimen 19, applying an axial impact load to the specimen 19.

[0038] The right end of the specimen 19 abuts against the sensing rod 9. The sensing rod 9 monitors the stress response on the right side of the specimen 19 through the stress sensor. At the same time, the moving seat 8 pushes the clamping seat 10 through the telescopic rod 18 to adjust the axial preload or constraint displacement of the specimen 19.

[0039] The locking clamps 11 on both sides of the clamping seat 10 clamp the sample 19 inward and provide radial clamping force; the sliding seat 15 moves along the side slide bar through the hydraulic rod, which drives the hydraulic chuck 17 at the end of the extension rod 16 to clamp the surface of the sample 19, and monitors the stress change of the sample 19 through the induction plate.

[0040] The drive vehicle inside the movable seat 8 drives it to slide along the track and can move the clamping seat 10 through the telescopic rod 18 to adjust the relative position between the sample piece 19 and the input rod 12 and the abutting sensing rod 9, so as to facilitate clamping sample pieces 19 of different lengths and realize axial preloading or impact gap control; after the hydraulic chuck 17 retracts to clamp the sensing plate, the hydraulic rod of the sliding seat 15 drives its displacement to apply a dynamic load to the sample piece 19 radially, and realize triaxial loading in conjunction with axial impact;

[0041] After the sample piece 19 is installed, all loading and adjustment processes are remotely operated by mechanical structures such as the drive vehicle and hydraulic rods, avoiding the risks of human operation, ensuring the safety and repeatability of the test, and achieving adjustment flexibility.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be considered as limiting the scope of the claims.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A Hopkinson-based triaxial impact test loading control device, comprising a housing (1), wherein the housing (1) is provided with a gas container (2), a test chamber (6) and a tail chamber (7), characterized in that: The gas container box (2) is located on the left side of the test chamber (6). The gas container box (2) is equipped with a pressurized gas cylinder and a jet pump. The right side of the gas container box (2) is equipped with a launching tube (3) and a punch (4) is installed inside the launching tube (3). The launching tube (3) is inserted into the inner cavity of the test chamber (6) to the right. The test chamber (6) is equipped with a track and a test assembly. The test assembly includes an abutment sensing rod (9), a clamping seat (10), an input rod (12), a three-jaw chuck (14), a chuck (17), and a sample (19). The test assembly is located above the track. The input rod (12) is clamped in the middle of the three-jaw chuck (14), and the left end of the input rod (12) corresponds to the transmitting tube (3). The sample (19) is installed in the middle of the clamping seat (10). The three-jaw chuck (14) has a chuck seat (13) installed on its left side; a movable seat (8) is provided on the right side of the abutting sensing rod (9), the movable seat (8) is slidably installed on the right side of the track, and a drive vehicle is installed inside the movable seat (8); telescopic rods (18) are symmetrically arranged at the bottom of the movable seat (8), and the telescopic rods (18) are connected to the clamping seat (10) to the left.

2. The loading control device for a Hopkinson-based triaxial impact test according to claim 1, characterized by: The transmitting tube (3) is a transparent tube, and a speed measuring instrument (5) is provided on the rear side of the transmitting tube (3).

3. The loading control device for a Hopkinson-based triaxial impact test according to claim 1, characterized by: The left end of the sample (19) abuts against the right end of the input rod (12); the abutment sensing rod (9) abuts against the right end of the sample (19); a stress sensor is installed on the abutment sensing rod (9).

4. The loading control device for a Hopkinson-based triaxial impact test according to claim 1, characterized by: A side slide bar is provided on the front side of the track, and a sliding seat (15) is slidably installed on the side slide bar. A hydraulic rod is provided on the sliding seat (15), and the sliding seat (15) is driven to move by the hydraulic rod. An extension rod (16) is provided on the side of the sliding seat (15) close to the sample (19). A chuck (17) is installed at the end of the extension rod (16). A sensor plate is installed on the chuck (17). The chuck (17) is a hydraulic chuck. When it retracts, it clamps the sensor plate on the sample (19) and changes the clamping position by moving the sliding seat (15).

5. The loading control device for a Hopkinson-based triaxial impact test according to claim 1, characterized by: The clamping seat (10) is located between the chuck seat (13) and the moving seat (8), and the bottom of the clamping seat (10) is slidably sleeved on the track; and clamping seat locking clips (11) are symmetrically arranged on both sides of the clamping seat (10), and the clamping seat locking clips (11) clamp and fix the sample piece (19) inward.

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