CN108645696B - Split Hopkinson torsion bar energy storage and release device and operation method - Google Patents
Split Hopkinson torsion bar energy storage and release device and operation method Download PDFInfo
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- CN108645696B CN108645696B CN201810442947.6A CN201810442947A CN108645696B CN 108645696 B CN108645696 B CN 108645696B CN 201810442947 A CN201810442947 A CN 201810442947A CN 108645696 B CN108645696 B CN 108645696B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0021—Torsional
Abstract
The invention discloses a separated Hopkinson torsion bar energy storage and release device and an operation method, which can realize impact torsion energy storage and release by a simple mechanical structure, wherein the device comprises a Hopkinson incident bar, a clamping mechanism, a release mechanism and an adjusting mechanism; the operation method provided by the invention can clamp the Hopkinson incident rod through the clamping and adjusting mechanism, so that the storage of torque is realized, and the instant release of the stored torsion energy is realized through the designed release device, so that the impact load action is simulated, and the impact experiment simulation condition is provided; meanwhile, the loaded impact load is determined by the number of torsion turns, so that the control is convenient; the loading device is suitable for different loading devices, can be repeatedly used and does not need consumables; the invention has simple structure, relatively low cost, easy control and convenient operation.
Description
Technical Field
The invention belongs to the technical field of impact torsion experiments, and particularly relates to a separated Hopkinson torsion bar energy storage and release device and an operation method.
Background
The torsion test is a basic test for knowing the shearing resistance of the material, and is generally carried out on a torsion testing machine, torque is applied to two ends of a sample during the test, a torsion angle is generated between two sections of the sample, when the torsion angle reaches a certain degree, the test piece is twisted off, and the fracture morphology of the torsion sample can reflect the material performance and the stress condition. However, under some conditions, the material may be subjected to high speed impact torsional loads, such as loading of the axle at the moment of engagement of the engine clutch, and loading of the axle when the vehicle is braked. When the material is subjected to high-speed torsional load, the shearing resistance of the material is different from that of the quasi-static torsional situation, so that a dynamic torsional experiment needs to be carried out on the material so as to know the shearing resistance of the material under the dynamic condition. The split Hopkinson torsion bar is an experimental device for measuring the shearing resistance of a material under a dynamic condition. The experimental device places the test piece between incident rod and transmission rod, and the incident rod is generally divided into two, separates both ends through clamping device, and the one end of keeping away from the test piece is called the end of pretwisting, loads the end of pretwisting through plus moment to twist reverse the energy and store, when clamping device released suddenly, the torsional energy of the storage of pretwisting end can be rapidly transmitted to the test piece through the other end with the form of ripples, thereby realizes the dynamic torsion to the test piece. The traditional split Hopkinson torsion bar generally adopts a cast iron stud with a slot in the middle to apply clamping force to a clamping mechanism, and when the clamping force reaches a certain degree, instantaneous loading is simulated by the fact that the cast iron stud breaks at the slot, but the method has some defects. Firstly, the fracture of the cast iron stud at the defect position cannot be controlled, so that the repeatability of clamping force in the experiment is difficult to ensure in the experiment; in the loading process of the experiment, if the cast iron stud is not strong enough, sudden fracture is easy to occur, and the experiment is directly failed; in the experiment, the iron casting can be used only once, so that the experiment cost is increased, and the experiment operation process is complicated. These use deficiencies have limited the development and application of split hopkinson torsion bars.
Although having among the prior art and providing hydraulic pressure locking-type device, having solved consumptive material problem and experiment repeatability problem, nevertheless compare in traditional mechanical structure, also have obvious shortcoming:
1. the hydraulic system generally has slow response, and when the hydraulic system is used as a clamping device of high-speed experimental equipment, instantaneous release cannot be realized in the release process, so that the experimental precision can be seriously influenced.
2. The hydraulic locking device requires a large supply system and is therefore expensive and difficult to maintain.
Disclosure of Invention
The invention aims to alleviate the technical contradiction to a certain extent, provides a separated Hopkinson torsion bar energy storage and release device and an operation method thereof, and solves the problems of the existing separation device.
The invention is realized by adopting the following technical scheme:
a split Hopkinson torsion bar energy storage and release device comprises a Hopkinson incident bar, a clamping mechanism, a release mechanism and an adjusting mechanism; wherein the content of the first and second substances,
the clamping mechanism comprises a base, a gland, a pin shaft and a connecting joint, wherein one end of the gland is hinged with the base, the other end of the gland is connected with the connecting joint through the pin shaft, through holes are formed in matching positions of two ends of the gland and the connecting joint, and the gland and the connecting joint are connected through the pin shaft to form a revolute pair capable of relatively rotating around the pin shaft;
the releasing mechanism comprises two identical steel balls, a sleeve, a special-shaped releasing rod, a magnet and a releasing handle, the special-shaped releasing rod is installed in the sleeve, and the releasing handle is connected with the special-shaped releasing rod through a through hole formed in the side edge of the sleeve; the magnet is embedded at the top of the special-shaped release lever; two steel balls are symmetrically arranged in a circular hole formed in the sleeve;
the adjusting mechanism comprises a gasket, a spring, a nut and an adjusting stud, and the nut and the adjusting stud are connected through threads; the adjusting stud penetrates through a hole in the bottom of the base and is connected with the bottom of the sleeve through threads at the top end of the adjusting stud with the releasing mechanism, the adjusting gasket is arranged between the stud and the sleeve, the spring is installed between the base and the gasket, and the releasing mechanism and the clamping mechanism enter small holes in the connecting joint through steel balls to realize connection; during the use, adjustment mechanism makes the adjusting stud move down through twisting the nut to pull release mechanism, drive fixture and realize the split Hopkinson incident rod centre gripping between base and gland.
The invention is further improved in that the clamping mechanism further comprises a hinge, and the base and the gland are connected through the hinge.
The invention is further improved in that the clamping mechanism further comprises a spring piece, the spring piece is fixed on the base, and the upper surface of the spring piece is in contact with the gland.
The invention is further improved in that the contact surfaces of the clamping mechanism base and the gland are respectively provided with a matched semicircular groove, and the Hopkinson incident rod is clamped in the semicircular groove.
The invention is further improved in that when in use, the release mechanism realizes the function of combining and releasing by changing the constraint state of the steel ball by controlling the rotation position of the special-shaped release rod in the sleeve.
The invention has the further improvement that the top of the sleeve of the release mechanism is arc-shaped, and the side edge is provided with a through hole which forms a 90-degree angle in the axial section and is used for connecting the release handle; the bottom of the sleeve is provided with a thread for connecting an adjusting mechanism.
The special-shaped release lever is a round lever, two symmetrical rectangular cross-section grooves are formed in the side face of the top of the round lever, threaded holes are drilled in the side wall of the bottom of the round lever, the rectangular cross-section grooves in the side face of the top are used for adjusting rectangular grooves of the limiting state of the steel ball, and the threaded holes used for connecting a release handle are formed in the bottom of the round lever.
An operation method of a separated Hopkinson torsion bar energy storage and release device comprises the following steps:
step S1, first checking whether the structure is normal;
step S2, connecting the adjusting mechanism and the releasing mechanism;
the nut is rotated to the bottom end of the adjusting stud, then the rotation angles of the gland and the connecting joint are adjusted, so that the hole at the upper end of the sleeve is aligned with the hole of the connecting joint, then the releasing handle is rotated to drive the special-shaped releasing rod to rotate, the contact surface of the steel ball and the special-shaped releasing rod is changed, the steel ball extends out, and a rotating pair capable of rotating around the common axis of the steel ball is formed between the connecting joint and the sleeve;
step S3, clamping;
the nut is rotated, so that the adjusting stud, the sleeve, the connecting joint and the gland are pulled to move downwards, the Hopkinson incident rod is compressed, and meanwhile, the spring is compressed;
step S4, storing energy;
after the steps are completed, torsion loading is carried out on one end of the Hopkinson incident rod, and at the moment, torsion energy is stored between the clamping point and the loading end;
step S5, release;
after waiting the loading to accomplish, rotate the release handle and drive the rotation of dysmorphism release lever, change the contact surface of steel ball and dysmorphism release lever, upwards promote gland and attach fitting for the steel ball is used down to get back to in the sleeve under the extrusion, thereby accomplish the lax in the twinkling of an eye that steps up, the energy that the Hopkinson incident pole stored will be released rapidly, load to keep away from on the test piece that the Hopkinson incident pole loading end is connected, thereby realize the impact and twist reverse loaded simulation.
A further improvement of the present invention is that in step S1, it is checked whether the steel ball is lost and the release handle is rotated normally.
The invention is further improved in that in step S3, the nut position is marked after the clamping is completed, thereby facilitating the repeated experiment.
The invention has the following beneficial technical effects:
the invention provides a split Hopkinson torsion bar energy storage and release device which comprises a Hopkinson incident bar, a clamping mechanism, a release mechanism and an adjusting mechanism. The clamping mode in the impact torsion energy storage stage is realized by a simple mechanical structure. The device has strong practicability, the clamping force can be controlled by the adjusting mechanism, the repeatability of the experiment is ensured, the release device consisting of the mechanical structure ensures the release instantaneity, and no material consumption is needed. Compared with other devices, the device can realize accurate impact loading at low cost and completely meet the requirement of experimental precision. In addition, the invention also has the characteristic of convenient operation.
Furthermore, the clamping mechanism base and the gland are provided with semi-cylindrical grooves, the section semi-circular shape of each groove is slightly smaller than 180 degrees, and a certain distance is reserved between the upper surface of the base and the lower surface of the gland when the upper surface of the base and the lower surface of the gland are parallel. Not only leave over the space for the installation of spring leaf like this, when the torsion bar centre gripping in groove, after gland and torsion bar surface laminating, can also further compress tightly, can satisfy different centre gripping dynamics demands, prevent to take place the slippage, reveal the energy. The clamping mechanism is composed of a pure mechanical structure, and is favorable for ensuring stable clamping conditions in the working process.
Further, the spring leaf between fixture base and the gland can be compressed at the centre gripping in-process and be filled the ability, kick-backs at the release in-process for release speed is faster.
Furthermore, the hole for placing the steel ball in the middle is arranged to be slightly inclined upwards at a certain angle, so that the steel ball is retained in the hole due to the dead weight and is prevented from rolling out; and the wall thickness of the sleeve is slightly smaller than the diameter of the steel ball, so that the stress surface of the steel ball cannot reach or exceed the center of the steel ball, the self-locking and non-release or the steel ball flying out in the loading process are prevented, the acting resultant force of the contact surface on the steel ball is increased, the contact surface always faces to the hole direction, and the release speed is improved. The section of the matching surface of the top end of the special-shaped release lever and the steel ball is processed into a special shape, and the working principle of the special-shaped release lever is similar to that of a cam mechanism. In the rotating process, the steel ball can be pushed out and rolled in, so that combination and release are realized.
Further, the magnet is embedded into the top end of the release special-shaped rod, and the generated magnetic force can ensure that the steel ball cannot fly out of the sleeve due to rigid impact after release.
Furthermore, a threaded hole is processed at the bottom end of the special-shaped release lever, and the release handle is screwed into the threaded hole of the special-shaped release lever from the end part of the through hole formed in a certain position on the side edge of the sleeve, so that the whole process is more labor-saving in operation.
Further, the invention provides an operation method of the separated Hopkinson torsion bar energy storage and release device. Firstly, checking whether the structure is normal, such as whether the steel ball is lost or not, whether the release handle rotates normally or not, and the like. Operation can begin if the systems are normal. Then the nut is rotated to enable the nut to rotate to the bottom end of the adjusting stud, then the rotating angles of the pressing cover and the connecting joint are adjusted to enable the hole in the upper end of the sleeve to be aligned with the hole in the connecting joint, then the releasing handle is rotated to drive the special-shaped releasing rod to rotate, the contact surface of the steel ball and the special-shaped releasing rod is changed, the steel ball extends out, and a rotating pair is formed between the connecting joint and the sleeve. And then the nut is rotated, so that the adjusting stud, the sleeve, the connecting joint and the gland are pulled to move downwards, the torsion bar is compacted, meanwhile, the spring leaf and the spring are compressed, and the rotation angle of the nut is marked so as to repeat the test. Finally, torsion loading is applied to one end of the torsion bar, at which point the torsion energy will be stored between the clamping point and the loading end. After the loading is finished, the release handle is rotated to drive the special-shaped release lever to rotate, the contact surface of the steel ball and the special-shaped release lever is changed, the pressing cover and the connecting joint are pushed upwards under the action of the spring piece, so that the steel ball returns to the sleeve under the extrusion, the instantaneous loosening of the clamping is finished, the energy stored by the torsion bar is rapidly released and loaded on a test piece far away from the connection of the loading end of the torsion bar, and the simulation of impact torsion loading is realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an assembly view of the gland portion of the clamping mechanism;
FIG. 3 is an assembly view of the clamping mechanism and release mechanism;
FIG. 4 is an assembly view of the release mechanism and the adjustment mechanism;
FIG. 5 is a detail view of the shaped release lever of the adjustment mechanism;
FIG. 6 is a front view of a sleeve in the adjustment mechanism;
FIG. 7 is a top view of a sleeve in the adjustment mechanism;
FIG. 8 is a detail view of an adjustment stud in the adjustment mechanism.
In the figure: 1. hopkinson incident rod 2, base 3, hinge 4, gland 5, spring leaf 6, pin shaft 7, connector 8, steel ball 9, sleeve 10, special-shaped release lever 11, magnet 12, release handle 13, gasket 14, spring 15, nut 16 and adjusting stud.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the whole working device of the split hopkinson torsion bar energy storage and release device provided by the invention is completely composed of mechanical structural members, and comprises a hopkinson incident bar 1, a clamping mechanism, a release mechanism and an adjusting mechanism.
Fixture is used for centre gripping hopkinson incident pole, and the constitution includes base 2, hinge 3, gland 4, spring leaf 5, round pin axle 6 and attach fitting 7, and wherein, 2 bottom threaded hole on base for connect the test bench, realize fixed to self. Base 2 and gland 4 pass through hinge 3 and are connected, gland 4 is connected through round pin axle 6 with attach fitting 7, spring leaf 5 is fixed on base 2, upper surface and gland 4 contact for make the centre gripping gland separate rapidly after the fixture release, and guarantee that release mechanism and guiding mechanism can not suddenly fall after the clamping-force uninstallation and strike base 2, fixture base 2 and gland 4 contact surface respectively are equipped with a semicircular groove, 1 centre gripping of hopkinson incident rod is in groove
As shown in fig. 2, a through hole is arranged at the matching position of the two ends of the gland 4 and the connecting joint 7 in the clamping mechanism, and the gland and the connecting joint are connected through a pin shaft 6 to form a revolute pair which can rotate relatively around the pin shaft;
as shown in figures 3 and 4, the release mechanism is connected with the clamping mechanism and the adjusting mechanism and can be freely combined with and separated from the clamping mechanism, the clamping mechanism is guaranteed not to be disconnected in the loading process and the clamping force is released instantly in the experiment process, the release mechanism comprises two identical steel balls 8, a sleeve 9, a special-shaped release rod 10, a magnet 11 and a release handle 12, the special-shaped release rod 10 is installed in the sleeve 9, the release handle 12 is connected with the special-shaped release rod 10 through a through hole formed in the side edge of the sleeve 9, and the special-shaped release rod 10 can be controlled to rotate freely in the sleeve through controlling the release handle 12. A circular magnet 11 is embedded in the top of the shaped release lever 10. The steel ball 8 is mounted in a circular hole in the sleeve 9 and engages the grooved portion surface of the shaped release lever 10.
The clamping mechanism and the releasing mechanism enter the small hole in the connecting joint 7 through the steel ball 8 to realize connection, the contact position of the mutual contact part of the end part of the special-shaped releasing rod 10 and the steel ball 8 is changed by rotating the releasing handle 12, so that the stroke of the steel ball 8 along the radial direction of the sleeve 9 is adjusted, the steel ball 8 realizes connection and separation between the adjusting mechanism sleeve 9 and the clamping mechanism connecting joint 7, and the combination and separation of the clamping mechanism and the releasing mechanism are controlled.
The adjusting mechanism is connected with the releasing mechanism and is used for realizing the loading and control of the clamping force. The adjusting mechanism comprises a spring 14, a nut 15 and an adjusting stud 16, wherein the nut 15 is connected with the adjusting stud 16 through threads, the adjusting stud 16 of the adjusting mechanism penetrates through a hole in the bottom of the base 2 and is connected with the bottom of the sleeve 9 through threads on the top end of the adjusting stud 16, a gasket 13 is arranged between the adjusting stud 16 and the sleeve 9, and the spring 14 is arranged between the base 2 and the gasket 13. Under the state that the whole structure keeps connected, the adjusting stud 16 moves downwards by twisting the nut 15, the releasing mechanism is pulled, the clamping mechanism is further driven to move downwards, and the Hopkinson incident rod 1 is clamped.
As shown in figure 5, the top of the shaped release lever 10 in the adjusting mechanism is provided with two symmetrical grooves with rectangular cross sections, and a round rod with a threaded hole is drilled on the side wall of the bottom. The top rectangular section groove is used for adjusting a rectangular groove of the limiting state of the steel ball 8, a threaded hole used for connecting a release handle 12 is formed in the bottom end of the rectangular section groove, and a groove in which the magnet 11 is embedded is formed in the top of the rectangular section groove, so that the steel ball cannot pop up in the release process.
As shown in fig. 6 and 7, the top of the sleeve 9 in the adjusting mechanism is arc-shaped to prevent interference during rotation; the side of the sleeve 9 is provided with a through hole which forms a 90-degree angle in the axial section and is used for connecting and releasing the handle 12; the bottom of the sleeve 9 is provided with a thread for connecting an adjusting stud 16 of an adjusting mechanism.
As shown in fig. 8, the adjusting stud 16 in the adjusting mechanism has a structure of a part, which is composed of a front part and a rear part with different outer diameters of threads, wherein the front end small thread is matched with the sleeve 9, the rear end thread is matched with the nut 15, the stroke of the adjusting mechanism is completed by the screwing depth of the nut, and the clamping force is further controlled.
The invention provides an operation method of a separated Hopkinson torsion bar energy storage and release device, which comprises the following steps:
step S1, first check if the structure is normal:
such as whether the steel ball 8 is lost or not, whether the release handle 12 rotates normally or not, and the like. Operation can begin if the systems are normal.
Step S2, connecting the adjustment mechanism and the release mechanism:
the nut 15 is rotated to the bottom end of the adjusting stud 16, then the rotating angles of the gland 4 and the connecting joint 7 are adjusted, so that the hole at the upper end of the sleeve 9 is aligned with the hole of the connecting joint, then the releasing handle 12 is rotated to drive the special-shaped releasing rod 10 to rotate, the contact surface of the steel ball 8 and the special-shaped releasing rod 10 is changed, the steel ball 8 extends out, and a rotating pair capable of rotating around the common axis of the steel ball is formed between the connecting joint 7 and the sleeve 9.
Step S3, clamping:
the nut 15 is rotated, so that the adjusting stud 16, the sleeve 9, the connecting joint 7 and the gland 4 are pulled to move downwards, the Hopkinson incident rod 1 is compressed, and meanwhile, the spring leaf 5 and the spring 14 are compressed. And the position of the nut is marked after clamping is finished, so that repeated experiments are convenient.
Step S4, energy storage:
after the steps are completed, torsion loading is carried out on one end of the Hopkinson incident rod 1, and at the moment, torsion energy is stored between the clamping point and the loading end.
Step S5, release:
after the loading is completed, the release handle 12 is rotated to drive the special-shaped release lever 10 to rotate, the contact surface between the steel ball 8 and the special-shaped release lever 10 is changed, under the action of the spring piece 5, the pressing cover 4 and the connecting joint 7 are pushed upwards, so that the steel ball 8 returns to the sleeve 9 under the extrusion, the instantaneous loosening of the tightening is completed, the energy stored in the Hopkinson incident rod 1 is rapidly released, the steel ball is loaded on a test piece which is far away from the loading end of the Hopkinson incident rod 1, and the simulation of impact torsion loading is realized.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. A separated Hopkinson torsion bar energy storage and release device is characterized by comprising a Hopkinson incident bar (1), a clamping mechanism, a release mechanism and an adjusting mechanism; wherein the content of the first and second substances,
the clamping mechanism comprises a base (2), a gland (4), a pin shaft (6) and a connecting joint (7), one end of the gland (4) is hinged with the base (1), the other end of the gland is connected with the connecting joint (7) through the pin shaft (6), through holes are formed in the matching positions of the two ends of the gland (4) and the connecting joint (7), and the gland and the connecting joint are connected through the pin shaft (6) to form a revolute pair capable of relatively rotating around the pin shaft (6);
the releasing mechanism comprises two identical steel balls (8), a sleeve (9), a special-shaped releasing rod (10), a magnet (11) and a releasing handle (12), the special-shaped releasing rod (10) is installed in the sleeve (9), and the releasing handle (12) is connected with the special-shaped releasing rod (10) through a through hole formed in the side edge of the sleeve (9); the magnet (11) is embedded at the top of the special-shaped release lever (10); two steel balls (8) are symmetrically arranged in a round hole formed in the sleeve (9);
the adjusting mechanism comprises a gasket (13), a spring (14), a nut (15) and an adjusting stud (16), and the nut (15) is connected with the adjusting stud (16) through threads; an adjusting stud (16) penetrates through a hole in the bottom of the base (2) and is connected with the bottom of the sleeve (9) through threads at the top end of the adjusting stud (16) and a release mechanism, an adjusting gasket (13) is arranged between the stud (16) and the sleeve (9), a spring (14) is installed between the base (2) and the gasket (13), and the release mechanism and the clamping mechanism enter a small hole in the connecting joint (7) through a steel ball (8) to realize connection; when the split Hopkinson incident rod clamping device is used, the adjusting stud (16) moves downwards by the adjusting mechanism through the torsion nut (15), so that the releasing mechanism is pulled, and the clamping mechanism is driven to clamp the split Hopkinson incident rod (1) between the base (2) and the gland (4).
2. A split hopkinson torsion bar energy storage and release device according to claim 1, wherein the clamping mechanism further comprises a hinge (3), and the base (2) and the gland (4) are connected by the hinge (3).
3. A split hopkinson torsion bar energy storage and release device according to claim 1, wherein the clamping mechanism further comprises a spring plate (5), the spring plate (5) is fixed on the base (2), and the upper surface is in contact with the gland (4).
4. A split hopkinson torsion bar energy storage and release device as claimed in claim 1, wherein the contact surfaces of the clamping mechanism base (2) and the gland (4) are respectively provided with a matched semicircular groove, and the hopkinson incident bar (1) is clamped at the semicircular groove.
5. A split hopkinson torsion bar storing and releasing device as claimed in claim 1, wherein, in use, the releasing mechanism realizes the function of combining and releasing by changing the restraining state of the steel ball (8) by controlling the rotating position of the profiled releasing lever (10) in the sleeve (9).
6. A split Hopkinson torsion bar energy storage and release device according to claim 5, wherein the top of the release mechanism sleeve (9) is arc-shaped, and the side edge is provided with a through hole which forms an angle of 90 ° in the axial section and is used for connecting the release handle (12); the bottom of the sleeve (9) is provided with a thread for connecting an adjusting mechanism.
7. A split Hopkinson torsion bar energy storage and release device according to claim 6, wherein the shaped release bar (10) is a round bar with two symmetrical rectangular cross section grooves on the top side and threaded holes drilled on the bottom side wall, wherein the rectangular cross section grooves on the top side are rectangular grooves for adjusting the position limit state of the steel ball (8), and the threaded holes for connecting the release handle (12) are formed on the bottom end.
8. A method of operating a split hopkinson torsion bar storing and releasing device as claimed in any one of claims 1 to 7, including the steps of:
step S1, first checking whether the structure is normal;
step S2, connecting the adjusting mechanism and the releasing mechanism;
the nut (15) is rotated to the bottom end of the adjusting stud (16), then the rotating angles of the gland (4) and the connecting joint (7) are adjusted, so that the hole in the upper end of the sleeve (9) is aligned with the hole in the connecting joint, then the releasing handle (12) is rotated to drive the special-shaped releasing lever (10) to rotate, the contact surface of the steel ball (8) and the special-shaped releasing lever (10) is changed, the steel ball (8) extends out, and a rotating pair capable of rotating around the common axis of the steel ball is formed between the connecting joint (7) and the sleeve (9);
step S3, clamping;
the nut (15) is rotated, so that the adjusting stud (16), the sleeve (9), the connecting joint (7) and the gland (4) are pulled to move downwards, the Hopkinson incident rod (1) is compressed, and meanwhile, the spring (14) is compressed;
step S4, storing energy;
after the steps are completed, torsion loading is carried out on one end of the Hopkinson incident rod (1), and at the moment, torsion energy is stored between the clamping point and the loading end;
step S5, release;
after waiting that the loading is accomplished, it drives special-shaped release lever (10) and rotates to rotate release handle (12), change steel ball (8) and the contact surface of special-shaped release lever (10), upwards promote gland (4) and attach fitting (7), make steel ball (8) get back to in sleeve (9) under the extrusion is used, thereby accomplish the lax in the twinkling of an eye that steps up, the energy that hopkinson incident rod (1) stored will be released rapidly, the loading is to keeping away from on the test piece that hopkinson incident rod (1) loading end is connected, thereby realize the simulation that the impact twists reverse the loading.
9. The operation method of split torsion hopkinson bar energy storage and release device according to claim 8, wherein in step S1, it is checked whether the steel ball (8) is lost and the release handle (12) is rotated normally.
10. The operation method of split hopkinson torsion bar energy storage and release device according to claim 8, wherein in step S3, the position of the nut (15) is marked after the clamping is completed, so as to facilitate the repeated experiments.
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| CN201810442947.6A CN108645696B (en) | 2018-05-10 | 2018-05-10 | Split Hopkinson torsion bar energy storage and release device and operation method |
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| CN110057663A (en) * | 2019-02-28 | 2019-07-26 | 西南交通大学 | Electromagnetic type split-Hopkinson torsional bar clamps and release device |
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| CN111006942B (en) * | 2019-12-27 | 2022-03-29 | 杨为东 | Operation bench for in-situ test |
| CN112945726B (en) * | 2021-01-29 | 2022-06-07 | 太原理工大学 | Split Hopkinson bar pulling/pressing-twisting dynamic composite loading device and operation method |
| CN112834327B (en) * | 2021-02-03 | 2022-07-12 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Hopkinson torsion bar hydraulic clamping and releasing device |
| CN113029756B (en) * | 2021-03-29 | 2022-11-25 | 哈尔滨瞬态加载试验设备技术开发有限公司 | Hopkinson torsion bar hydraulic clamping and releasing device |
| CN116465587B (en) * | 2023-03-29 | 2024-04-16 | 中国飞机强度研究所 | Test system for introducing small-energy low-speed impact damage |
| CN116625848B (en) * | 2023-05-18 | 2024-01-09 | 天津大学 | Composite loading device |
| CN116818563B (en) * | 2023-06-20 | 2024-03-08 | 天津大学 | Experimental device based on hopkinson pole |
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| US8001826B2 (en) * | 2009-05-26 | 2011-08-23 | Raytheon Company | Methods and apparatus for high frequency impact testing |
| CN102914478A (en) * | 2012-10-30 | 2013-02-06 | 北京理工大学 | Spring-lever energy storage type fatigue tension test machine |
| CN103935490B (en) * | 2014-04-28 | 2016-04-20 | 哈尔滨工程大学 | Safe valve type underwater fixed depth releasing device |
| CN104110458A (en) * | 2014-06-23 | 2014-10-22 | 中国矿业大学(北京) | Damped system and automatic control system of split Hopkinson pressure bar |
| CN104697854B (en) * | 2015-03-11 | 2017-05-24 | 中国人民解放军陆军军官学院 | Hydraulic surrounding type locking and releasing device for energy pre-storage type Hopkinson torsional bar |
| CN205506587U (en) * | 2016-04-08 | 2016-08-24 | 浙江大学城市学院 | Lumbar vertebrae fatigue testing machine's power unit |
| CN106198227B (en) * | 2016-07-12 | 2023-01-24 | 辽宁工程技术大学 | Energy storage drop hammer type dynamic and static combined loading test device |
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