CN105181486A - Flywheel type split-Hopkinson torsional bar device - Google Patents
Flywheel type split-Hopkinson torsional bar device Download PDFInfo
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- CN105181486A CN105181486A CN201510615594.1A CN201510615594A CN105181486A CN 105181486 A CN105181486 A CN 105181486A CN 201510615594 A CN201510615594 A CN 201510615594A CN 105181486 A CN105181486 A CN 105181486A
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- 238000002474 experimental method Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 8
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- 238000006243 chemical reaction Methods 0.000 abstract description 3
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- 238000004146 energy storage Methods 0.000 description 5
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Abstract
The invention provides a flywheel type split-Hopkinson torsional bar device, and relates to the field of material dynamic mechanics performance experimental facilities. The flywheel type split-Hopkinson torsional bar device mainly comprises a rotary driving device, a driving flywheel, electromagnetic attraction devices, a ferromagnetic flywheel, a flange plate, a torsion incident rod and a torsion transmitting rod. The driving flywheel and the flange plate are arranged at the two sides of the ferromagnetic flywheel respectively. Friction plates are arranged on two opposite side faces of the driving flywheel and the ferromagnetic flywheel respectively, and friction plates are arranged on two opposite side faces of the flange plate and the ferromagnetic flywheel respectively. The driving flywheel is connected with the rotary driving device through a driving wheel shaft, the flange plate is connected with the torsion incident rod, and a test piece is mounted between the torsion transmitting rod and the torsion incident rod. The defects existing in the loading process of an existing energy pre-storage type separated split-Hopkinson torsional bar are completely overcome, the defect that a T-shaped split-Hopkinson torsional bar device generates complex bending waves in a conversion device is completely overcome, experiment difficulty is greatly lowered, and experiment efficiency is greatly improved.
Description
Technical field
The present invention relates to In Dynamic Testing of Materials apparatus field, particularly relate to a kind of flywheel-type Hopkinson torsion bar device.
Background technology
Split hopkinson bar is a kind of effective experimental provision studying material dynamic mechanical performance under one-dimensional stress state.Since Kolsky invention split hopkinson press bar devices in 1949 and with since material dynamic mechanical performance under its research one-dimensional stress state, dynamic compression experiments technology improves constantly.For some material, its dynamic stretching is more important than its Dynamic compressive property, and separate type Hopkinson pull rod there has also been significant progress.But researcher is more concerned about the dynamic shear resistance of material sometimes, thus the seventies human hair such as T.Nicholas understand pre-energy-storage type separate type split-Hopkinson torsional bar.So-called pre-energy-storage type separate type split-Hopkinson torsional bar is divided into two by torsion incident bar, and wherein there is the rotating head (this section is called pretwist section) being convenient to add moment of face (load) one end, and the other end is then connected with test specimen.At boundary one tight-holding type fixture (wherein main part is the bolt having ring-type V-shaped groove in the middle part of in the of), bar cramp is lived, stop it to reverse.With lifting jack or other device rotating head rotated thus reverse pre-section and load, this section stores amount of torsional energy in advance.When pre-energy storage value reaches experimenter expectation value, experimenter discharges clamping device rapidly, and the non-loaded segment that the energy (stress, strain) of prestrain section is transmitted to incident bar with the form of ripple forms torsion loading wave.The main weak point of adopting in this way has:
1. clamp device is difficult to clamped completely by bar and do not rotate, and often will constantly go to strengthen clamping force (tighting a bolt further), to stop rotational slide in loading procedure.Usually can there is bolt in the process to rupture suddenly, cause this failure of an experiment.
2. this pre-energy-storing-type torsion bar is the bolt release clip having ring-type V-shaped groove by twisting into two parts middle part in experiment, and the process of twisting into two parts bolt has very large randomness, has a strong impact on the repeatability of the experiment condition of waveform.
Ginger tin power in 2013 etc. have invented T-shaped separate type split-Hopkinson torsional bar, this invention almost overcomes all shortcomings of pre-energy-storing-type torsion bar, but because of its reasons in structure, complicated flexural wave is inevitably produced in conversion equipment, this flexural wave is difficult to again eliminate, and can be passed to and reverse in incident bar.In addition, for the torsion bar of major diameter (as 1000mm), propagating because of ripple and reach on bar xsect evenly needs the long period, meanwhile, ripple spreads vertically, causes the rising edge reversing incident wave impossible precipitous, have impact on the raising of experiment rate of strain.
Summary of the invention
The object of the present invention is to provide a kind of flywheel-type Hopkinson torsion bar device, to solve the problems of the technologies described above.
Technical matters to be solved by this invention realizes by the following technical solutions:
A kind of flywheel-type Hopkinson torsion bar device, it is characterized in that: mainly comprise rotating driving device, initiatively flywheel, electromagnetic suction device, ferromagnetism flywheel, ring flange, torsion incident bar, reverse transmission bar, described active flywheel, ferromagnetism flywheel and ring flange three are coaxially arranged, described active flywheel and ring flange are separately positioned on the both sides of ferromagnetism flywheel, and leave gap; The two sides that described active flywheel is relative with ferromagnetism flywheel are respectively arranged with friction disc, and the two sides that described ring flange is relative with ferromagnetism flywheel are respectively arranged with friction disc; Described active flywheel is connected with rotating driving device by drive sprocket axle, and described ring flange is connected with torsion incident bar, and described torsion transmission bar is coaxially oppositely arranged with torsion incident bar, installs test specimen between described torsion transmission bar and torsion incident bar; Described electromagnetic suction device comprises the first electromagnetic suction device and the second electromagnetic suction device that arrange ferromagnetism flywheel both sides respectively, and wherein the first electromagnetic suction device is arranged with active flywheel homonymy, and the second electromagnetic suction device and ring flange homonymy are arranged.
The side that described ring flange is connected with torsion incident bar is also provided with axial carrying stop means.
Described ferromagnetism flywheel is supported by axis and can around middle shaft rotation, and axis is supported by fulcrum arrangement, and its circumference is rotated freely, is axially free to slide.
Described ferromagnetism flywheel is made primarily of ferrimagnet.
Described torsion incident bar, torsion transmission bar are supported by rolling bearing device.
First rotating driving device drives initiatively flywheel to rotate, and the first electromagnetic suction device adhesive ferromagnetism flywheel makes it closely sealed with active flywheel, by friction disc, ferromagnetism flywheel is rotated together with active flywheel with a fixed angular speed.First electromagnetic suction device quits work, meanwhile the second electromagnetic suction device start adhesive ferromagnetism flywheel make it to ring flange motion and closely sealed with it, under friction disc effect, rotational kinetic energy and the momentum moment are passed to ring flange by ferromagnetism flywheel, then import torsion incident bar into the form of ripple, in torsion incident bar, form torsional wave and propagate to test specimen; On test specimen interface, a torsional wave part is reflected back torsion incident bar, and a part is transmitted to be reversed in transmission bar.Record reverses the waveform in incident bar and torsion transmission bar respectively, just analytical calculation can obtain material for test distorting stress strain curve under certain rate of strain according to the theory of Hopkinson bar.
After ferromagnetism flywheel and the closely sealed certain hour of ring flange, the second electromagnetic suction device quits work, and the first electromagnetic suction device works the adhesive of ferromagnetism flywheel again on active flywheel.
Described electromagnetic suction device is divided and is listed in the ferromagnetism flywheel left and right sides, be called the first electromagnetic suction device and the second electromagnetic suction device respectively, under test routine controls, stream oriented device replaces adhesive, makes the side-to-side movement of ferromagnetism flywheel reach object torsion incident bar being added to unloading.
The invention has the beneficial effects as follows:
A kind of flywheel-type Hopkinson torsion bar device provided by the invention, for carrying out dynamic torsion test to material, thoroughly compensate for the defect that pre existing energy-storage type separate type split-Hopkinson torsional bar exists in loading procedure, and T-shaped Hopkinson torsion bar device produces the defect of complicated flexural wave in conversion equipment, substantially reduce experiment difficulty, drastically increase conventional efficient.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with specific embodiments and the drawings, set forth the present invention further, but following embodiment being only the preferred embodiments of the present invention, and not all.Based on the embodiment in embodiment, those skilled in the art under the prerequisite not making creative work obtain other embodiment, all belong to protection scope of the present invention.
As shown in Figure 1, a kind of flywheel-type Hopkinson torsion bar device, mainly comprise rotating driving device 1, initiatively flywheel 3, first electromagnetic suction device 4, second electromagnetic suction device 6, ferromagnetism flywheel 5, ring flange 12, reverse incident bar 8, reverse transmission bar 10, initiatively flywheel 3, ferromagnetism flywheel 5 and ring flange 12 three are coaxially arranged, initiatively flywheel 3 and ring flange 12 are separately positioned on the both sides of ferromagnetism flywheel 5, and leave gap; The two sides that initiatively flywheel 3 is relative with ferromagnetism flywheel 5 are respectively arranged with friction disc 13, and the two sides that ring flange 12 is relative with ferromagnetism flywheel 5 are also respectively arranged with friction disc 13; Initiatively flywheel 3 is connected with rotating driving device 1 by drive sprocket axle 2, and ring flange 12 is connected with torsion incident bar 8, reverses transmission bar 10 and is coaxially oppositely arranged with torsion incident bar 8, reverses transmission bar 10 and reverses between incident bar 8 and install test specimen 9; First electromagnetic suction device 4 and the second electromagnetic suction device 6 are separately positioned on ferromagnetism flywheel 5 both sides, and wherein the first electromagnetic suction device 4 is arranged with active flywheel 3 homonymy, and the second electromagnetic suction device 6 is arranged with ring flange 12 homonymy; The side that ring flange 12 is connected with torsion incident bar 8 is also provided with axial carrying stop means 7, reverses incident bar 8, torsion transmission bar 10 is supported by rolling bearing device 11.
Axial carrying stop means 7 is absorbed in kinetic energy and the momentum of the axially-movable produced in the second electromagnetic suction device 6 adhesive ferromagnetism flywheel 5 process, makes it the least possible importing into and reverses incident bar 8, but do not limit the rotation of ring flange 12.
First rotating driving device 1 drives initiatively flywheel 3, and after reaching certain rotating speed, the first electromagnetic suction device 4 adhesive ferromagnetism flywheel 5 makes it closely sealed with active flywheel 3, by friction disc 13, ferromagnetism flywheel 5 is rotated together with active flywheel 3 with a fixed angular speed.First electromagnetic suction device 4 quits work, meanwhile the second electromagnetic suction device 6 starts adhesive ferromagnetism flywheel 5 and makes it to move and closely sealed with it to ring flange 12, under friction disc 13 acts on, rotational kinetic energy and the momentum moment to be passed to ring flange 12 and then import into the form of ripple and reverse incident bar 8 by ferromagnetism flywheel 5, form torsional wave and propagate to test specimen 9 in torsion incident bar 8.On test specimen 9 interface, a torsional wave part is reflected back reverses incident bar 8, a part is transmitted to be reversed in transmission bar 10, record reverses the waveform in incident bar 8 and torsion transmission bar 10 respectively, just analytical calculation can obtain material for test distorting stress strain curve under certain rate of strain according to the theory of Hopkinson bar.
The present invention compensate for pre existing energy-storage type separate type split-Hopkinson torsional bar mentioned above and the weak point of T-shaped Hopkinson torsion bar device up hill and dale, substantially reduces experiment difficulty, drastically increases conventional efficient.
More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.Be only the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those of ordinary skill in the art are in the technical scope disclosed by the present invention; the change that can expect easily or replacement (as adopted Hopkinson pull rod replacement Hopkinson pressure bar etc. wherein), all should be encompassed within protection scope of the present invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (5)
1. a flywheel-type Hopkinson torsion bar device, it is characterized in that: mainly comprise rotating driving device, initiatively flywheel, electromagnetic suction device, ferromagnetism flywheel, ring flange, torsion incident bar, reverse transmission bar, described active flywheel, ferromagnetism flywheel and ring flange three are coaxially arranged, described active flywheel and ring flange are separately positioned on the both sides of ferromagnetism flywheel, and leave gap; The two sides that described active flywheel is relative with ferromagnetism flywheel are respectively arranged with friction disc, and the two sides that described ring flange is relative with ferromagnetism flywheel are respectively arranged with friction disc; Described active flywheel is connected with rotating driving device by drive sprocket axle, and described ring flange is connected with torsion incident bar, and described torsion transmission bar is coaxially oppositely arranged with torsion incident bar, installs test specimen between described torsion transmission bar and torsion incident bar; Described electromagnetic suction device comprises the first electromagnetic suction device and the second electromagnetic suction device that arrange ferromagnetism flywheel both sides respectively, and wherein the first electromagnetic suction device is arranged with active flywheel homonymy, and the second electromagnetic suction device and ring flange homonymy are arranged.
2. flywheel-type Hopkinson torsion bar device according to claim 1, is characterized in that: the side that described ring flange is connected with torsion incident bar is also provided with axial carrying stop means.
3. flywheel-type Hopkinson torsion bar device according to claim 1, is characterized in that: described ferromagnetism flywheel is supported by axis and can around middle shaft rotation, and axis is supported by fulcrum arrangement, and its circumference is rotated freely, is axially free to slide.
4. flywheel-type Hopkinson torsion bar device according to claim 1, is characterized in that: described ferromagnetism flywheel is made primarily of ferrimagnet.
5. flywheel-type Hopkinson torsion bar device according to claim 1, is characterized in that: described torsion incident bar, torsion transmission bar are supported by rolling bearing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510615594.1A CN105181486B (en) | 2015-09-24 | 2015-09-24 | Flywheel-type Hopkinson torsion bar device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510615594.1A CN105181486B (en) | 2015-09-24 | 2015-09-24 | Flywheel-type Hopkinson torsion bar device |
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| CN105181486A true CN105181486A (en) | 2015-12-23 |
| CN105181486B CN105181486B (en) | 2018-05-01 |
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| CN201510615594.1A Withdrawn - After Issue CN105181486B (en) | 2015-09-24 | 2015-09-24 | Flywheel-type Hopkinson torsion bar device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651625A (en) * | 2016-01-06 | 2016-06-08 | 西北工业大学 | Loading device for disc type split-hopkinson torsional bar based on electromagnetic force and experimental method |
| CN108120647A (en) * | 2017-12-18 | 2018-06-05 | 宁波大学 | A kind of material impact reverses loading experimental apparatus |
| CN109187231A (en) * | 2018-09-04 | 2019-01-11 | 合肥姜水材性科技有限公司 | A kind of electromagnetism pressure-rotary split-Hopkinson torsional bar |
| CN110057663A (en) * | 2019-02-28 | 2019-07-26 | 西南交通大学 | Electromagnetic type split-Hopkinson torsional bar clamps and release device |
| CN111487119A (en) * | 2019-09-06 | 2020-08-04 | 西北工业大学 | Torsional stress wave releasing device |
| CN112945726A (en) * | 2021-01-29 | 2021-06-11 | 太原理工大学 | Split Hopkinson bar pulling/pressing-twisting dynamic composite loading device and operation method |
| CN113494242A (en) * | 2020-04-02 | 2021-10-12 | 中国石油化工股份有限公司 | Rotary guide tool and use method thereof |
| CN114965117A (en) * | 2022-05-06 | 2022-08-30 | 天津大学 | Dynamic friction experimental device and method for testing dynamic mechanical property of material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2482606Y (en) * | 2001-07-20 | 2002-03-20 | 韩伍林 | Electromagnetic friction clutch |
| CN103325293A (en) * | 2013-05-29 | 2013-09-25 | 哈尔滨工业大学 | Equivalent mass simulation device utilizing flywheel energy storage and being applied to object collision |
| CN103471938A (en) * | 2013-08-24 | 2013-12-25 | 中国人民解放军陆军军官学院 | T-shaped Hopkinson torsion bar device |
| CN104697854A (en) * | 2015-03-11 | 2015-06-10 | 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 |
| CN104897486A (en) * | 2015-05-20 | 2015-09-09 | 西北工业大学 | Electromagnetic torsional split-Hopkinson bar loading device |
-
2015
- 2015-09-24 CN CN201510615594.1A patent/CN105181486B/en not_active Withdrawn - After Issue
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2482606Y (en) * | 2001-07-20 | 2002-03-20 | 韩伍林 | Electromagnetic friction clutch |
| CN103325293A (en) * | 2013-05-29 | 2013-09-25 | 哈尔滨工业大学 | Equivalent mass simulation device utilizing flywheel energy storage and being applied to object collision |
| CN103471938A (en) * | 2013-08-24 | 2013-12-25 | 中国人民解放军陆军军官学院 | T-shaped Hopkinson torsion bar device |
| CN104697854A (en) * | 2015-03-11 | 2015-06-10 | 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 |
| CN104897486A (en) * | 2015-05-20 | 2015-09-09 | 西北工业大学 | Electromagnetic torsional split-Hopkinson bar loading device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105651625A (en) * | 2016-01-06 | 2016-06-08 | 西北工业大学 | Loading device for disc type split-hopkinson torsional bar based on electromagnetic force and experimental method |
| CN105651625B (en) * | 2016-01-06 | 2018-08-14 | 西北工业大学 | Disc type split-Hopkinson torsional bar loading device based on electromagnetic force and experimental method |
| CN108120647A (en) * | 2017-12-18 | 2018-06-05 | 宁波大学 | A kind of material impact reverses loading experimental apparatus |
| CN108120647B (en) * | 2017-12-18 | 2020-01-31 | 宁波大学 | material impact torsion loading experimental device |
| CN109187231A (en) * | 2018-09-04 | 2019-01-11 | 合肥姜水材性科技有限公司 | A kind of electromagnetism pressure-rotary split-Hopkinson torsional bar |
| CN110057663A (en) * | 2019-02-28 | 2019-07-26 | 西南交通大学 | Electromagnetic type split-Hopkinson torsional bar clamps and release device |
| CN111487119A (en) * | 2019-09-06 | 2020-08-04 | 西北工业大学 | Torsional stress wave releasing device |
| CN113494242A (en) * | 2020-04-02 | 2021-10-12 | 中国石油化工股份有限公司 | Rotary guide tool and use method thereof |
| CN112945726A (en) * | 2021-01-29 | 2021-06-11 | 太原理工大学 | Split Hopkinson bar pulling/pressing-twisting dynamic composite loading device and operation method |
| CN114965117A (en) * | 2022-05-06 | 2022-08-30 | 天津大学 | Dynamic friction experimental device and method for testing dynamic mechanical property of material |
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| CN105181486B (en) | 2018-05-01 |
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Effective date of registration: 20210122 Address after: Room 13002, Bengbu International Plaza, Huaiyuan City, Anhui Province Patentee after: Bengbu Zhibo Automation Technology Development Co., Ltd Address before: 233400 science and technology entrepreneurship center of Huaiyuan Economic Development Zone, Bengbu City, Anhui Province Patentee before: Huaiyuan small and medium enterprises Productivity Promotion Center Co.,Ltd. |
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