CN104677725A - Confining pressure cylinder device for novel split Hopkinson pressure bar active confining pressure experiment - Google Patents
Confining pressure cylinder device for novel split Hopkinson pressure bar active confining pressure experiment Download PDFInfo
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- CN104677725A CN104677725A CN201510076422.1A CN201510076422A CN104677725A CN 104677725 A CN104677725 A CN 104677725A CN 201510076422 A CN201510076422 A CN 201510076422A CN 104677725 A CN104677725 A CN 104677725A
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Abstract
The invention relates to an impact loading experimental device for material dynamic mechanical property, and in particular relates to a confining pressure cylinder device for a novel split Hopkinson pressure bar active confining pressure experiment. The confining pressure cylinder device comprises a cylinder body, a pressure cavity in the cylinder body, cylinder covers, pressing blocks, a metal sleeve, a rubber sleeve and a shaft hole; the confining pressure cylinder device is characterized in that the cylinder covers are respectively arranged at two ends outside the cylinder body; corresponding to the cylinder covers, pressing blocks are respectively arranged at two ends of the pressure cavity, and one end of each pressing block extends into the cylinder body; the metal sleeve is arranged between the pressing blocks at two ends of the pressure cavity and is connected by virtue of a screw; the rubber sleeve is arranged on the inner side of the metal sleeve; and the rubber sleeve is arranged between the pressing blocks at two ends of the pressure cavity, so that the pressing blocks, the metal sleeve and the rubber sleeve are integrated. The device disclosed by the invention not only can prevent the rubber sleeve, in the case of deforming, from entering into a clearance formed between a sealing cover and a rod piece to drive the rod piece to move outwards, but also can solve a problem that a test piece cannot be tightly pressed by the rod piece since the rod piece is stressed to cause a trend of moving towards the outer side of the cavity body when the rod piece is closely held in the rubber sleeve under high pressure; and the confining pressure cylinder device is simple in structure.
Description
Technical field
The present invention relates to the impact loading experiment device of material dynamic mechanical performance, the confined pressure cylinder assembly of especially a kind of novel Hopkinson pressure bar active confined pressure experiment.
Background technology
Along with underground works, anti-seismic structure and protection works to concrete material under complex stress condition high strain-rate dynamic mechanical in the urgent need to, the research of the dynamic mechanical of material more and more causes the attention of people.People constantly propose a series of impact loading device being exclusively used in test material dynamic mechanical, Hopkinson pressure bar becomes the material Large strain mechanical property experiment device be most widely used in the world at present, wherein split hopkinson press bar because of its structure simple, operating cost is cheap to be obtained a wide range of applications.
Split hopkinson bar is effective experimental provision of material dynamic mechanical performance under research one-dimensional stress state.Current split hopkinson bar experimental provision has large improvement, and experimental technique is also largely increased; But most construction material is in use not only subject to axial dynamic loading, and be also subject to the effect of passive radial load (confined pressure), therefore study in static confined pressure situation and then become inevitable by the mechanical response of material during axial dynamic loading again.Market also there are some Hopkinson confining pressure device, but Hopkinson confining pressure device ubiquity problem in the market, be exactly when pressure chamber supercharging, high pressure makes rubber sleeve hold rod member tightly, the trend simultaneously making the stressed generation of rod member run outside cavity, occurs making rod member not press tightly the problem of test specimen.
Patent No. CN202837089 " the confined pressure cylinder assembly of a kind of Hopkinson pressure bar active confined pressure experiment ", it is made up of confined pressure cylinder body, Timing positioning screw, test specimen positioning support support set, oil resistant rubber cover, table pipe and the parts such as vent port and high-pressure oil pipe access port; Accurate adjustment and fixing test specimen, ensure that the Impulsive load experimental data of test specimen.But when pressure chamber supercharging, high pressure makes rubber sleeve hold rod member tightly, the trend simultaneously making the stressed generation of rod member run outside cavity, occurs making rod member not press tightly the problem of test specimen.Thus cause originally no longer contacting with test specimen with the rod member section of test specimen close contact, leave space, impact experiment.
The patent No. 201310373162.5 " for preventing the back-up ring moved outside rod member in the test of Hopkinson pressure bar confined pressure ", comprise the pressure vessel be made up of cylindrical shell and capping, the metal sleeve also comprising rubber bush and be enclosed within outside rubber bush, metal sleeve arranges through hole, inside described rubber bush, is also provided with metal collar.Solve rubber bush in experimentation to deform under pressure, enter in the space that capping and rod member formed, and drive the situation of moving outside rod member.And when pressure chamber continues supercharging, although metal collar enters after preventing rubber bush to be out of shape in the gap that capping and rod member formed to drive outside rod member and moves, but still can not solve the trend that high pressure makes the stressed generation of rod member run outside cavity while making rubber sleeve hold rod member tightly, rod member is made not press tightly the problem of test specimen, thus cause originally no longer contacting with test specimen with the rod member section of test specimen close contact, leave space, impact experiment.
The compact heap at pressure chamber two ends of the present invention is connected as one by screw and metallic sheath, and rubber sleeve is arranged on compact heap and is connected with metallic sheath in the rear enclosure space formed; Compact heap and metallic sheath, rubber sleeve form an entirety thus, this entirety axial float in pressure chamber, after injecting hydraulic oil in pressure chamber, the hydraulic oil in pressure chamber can enter compact heap outer space by the gap of compact heap, finally makes both sides pressure equal; The direction of the entirety formed suffered membrane stress in cavity is equal, and be equivalent to the suspended matter contained by pressure oil, pressure oil can not be delivered to incident bar, transmission bar and the test specimen inside rubber sleeve to the pressure distortion that cylinder body causes; Therefore incident bar and transmission bar can remain the extruding force to test specimen, not by the impact of housing profile variation.
Summary of the invention
In order to solve Hopkinson confining pressure device in the market when pressure chamber supercharging, high pressure makes rubber sleeve hold rod member tightly, make the trend that the stressed generation of rod member runs outside cavity simultaneously, occur making rod member not press tightly the problem of test specimen, the confined pressure cylinder assembly of a kind of novel Hopkinson pressure bar active confined pressure experiment is proposed, this device enters after not only preventing rubber bush to be out of shape in the gap that capping and rod member formed to drive outside rod member and moves, and solve the trend that high pressure makes the stressed generation of rod member run outside cavity while making rubber sleeve hold rod member tightly, rod member is made not press tightly the problem of test specimen, structure is simple, reasonable in design.
A confined pressure cylinder assembly for novel Hopkinson pressure bar active confined pressure experiment, comprises the pressure chamber in cylinder body, cylinder body, cylinder cap, compact heap, metallic sheath, rubber sleeve and axis hole, it is characterized in that: the outer two ends of described cylinder body are respectively arranged with cylinder cap; The corresponding cylinder cap in described pressure chamber two ends is respectively equipped with compact heap, and compact heap one end stretches in cylinder body; Be provided with metallic sheath between the compact heap at described pressure chamber two ends, and be connected by screw; Be provided with rubber sleeve inside described metallic sheath, and rubber sleeve is between the compact heap at pressure chamber two ends, makes compact heap and metallic sheath, rubber sleeve form an entirety.
Described cylinder cap and compact heap concentric are arranged, and middle part is all reserved with the axis hole of concentric.
Beneficial effect: the present invention is the improvement carried out existing confining pressure device; Enter after not only preventing rubber bush to be out of shape in the gap that capping and rod member formed to drive outside rod member and move, and solve the trend that high pressure makes the stressed generation of rod member run outside cavity while making rubber sleeve hold rod member tightly, make rod member not press tightly the problem of test specimen, structure is simple, reasonable in design.
The compact heap at pressure chamber two ends of the present invention is connected as one by screw and metallic sheath, and rubber sleeve is arranged on compact heap and is connected with metallic sheath in the rear enclosure space formed; Compact heap and metallic sheath, rubber sleeve form an entirety thus, this entirety axial float in pressure chamber, after injecting hydraulic oil in pressure chamber, the hydraulic oil in pressure chamber can enter compact heap outer space by the gap of compact heap, finally makes both sides pressure equal; The direction of the entirety formed suffered membrane stress in cavity is equal, and be equivalent to the suspended matter contained by pressure oil, pressure oil can not be delivered to incident bar, transmission bar and the test specimen inside rubber sleeve to the pressure distortion that cylinder body causes; Therefore incident bar and transmission bar can remain the extruding force to test specimen, not by the impact of cylinder body profile variation.
Accompanying drawing explanation
Fig. 1 is the structural representation of invention.
In figure: 1-cylinder body; 2-pressure chamber; 3-cylinder cap; 4-axis hole; 5-rubber sleeve; 6-metallic sheath; 7-compact heap; 8-screw.
Embodiment
The confined pressure cylinder assembly of a kind of novel Hopkinson pressure bar active confined pressure experiment as shown in Figure 1, comprises the pressure chamber 2 in cylinder body 1, cylinder body 1, cylinder cap 3, compact heap 8, metallic sheath 6, rubber sleeve 5 and axis hole 4; The described outer two ends of cylinder body 1 are respectively arranged with cylinder cap 3; The corresponding cylinder cap 3 in described pressure chamber 2 two ends is respectively equipped with compact heap 8, and compact heap 8 one end stretches in cylinder body 1; Be provided with metallic sheath 6 between the compact heap 8 at described pressure chamber 2 two ends, and connected by screw 9; Be provided with rubber sleeve 5 inside described metallic sheath 6, and rubber sleeve 5 is between the compact heap 8 at pressure chamber 2 two ends, makes compact heap 8 and metallic sheath 6, rubber sleeve 5 form an entirety.
Described cylinder cap and compact heap concentric are arranged, and middle part is all reserved with the axis hole of concentric.
Principle of work: compact heap 8 is set at pressure chamber 2 two ends, the compact heap 8 at pressure chamber 2 two ends is connected as one by screw 9 and metallic sheath 6, and rubber sleeve 5 is arranged on compact heap 8 and is connected in the enclosure space of rear formation with metallic sheath 6; Compact heap 8 and metallic sheath 6, rubber sleeve 5 form an entirety thus, this entirety is axial float in pressure chamber 2, after injecting hydraulic oil in pressure chamber 2, the hydraulic oil in pressure chamber 2 can enter compact heap outer space by the gap of compact heap 8, finally makes both sides pressure equal; The direction of the entirety formed suffered membrane stress in cylinder body 1 is equal, and be equivalent to the suspended matter contained by pressure oil, pressure oil can not be delivered to incident bar, transmission bar and the test specimen inside rubber sleeve 5 to the pressure distortion that cylinder body 1 causes; Therefore incident bar and transmission bar can remain the extruding force to test specimen, not by the impact of cylinder body 1 profile variation.
Claims (2)
1. a confined pressure cylinder assembly for novel Hopkinson pressure bar active confined pressure experiment, comprises the pressure chamber in cylinder body, cylinder body, cylinder cap, compact heap, metallic sheath, rubber sleeve and axis hole, it is characterized in that: the outer two ends of described cylinder body are respectively arranged with cylinder cap; The corresponding cylinder cap in described pressure chamber two ends is respectively equipped with compact heap, and compact heap one end stretches in cylinder body; Be provided with metallic sheath between the compact heap at described pressure chamber two ends, and be connected by screw; Be provided with rubber sleeve inside described metallic sheath, and rubber sleeve is between the compact heap at pressure chamber two ends, makes compact heap and metallic sheath, rubber sleeve form an entirety.
2. the confined pressure cylinder assembly of a kind of novel Hopkinson pressure bar active confined pressure according to claim 1 experiment, is characterized in that: described cylinder cap and compact heap concentric are arranged, and middle part is all reserved with the axis hole of concentric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510076422.1A CN104677725A (en) | 2015-02-13 | 2015-02-13 | Confining pressure cylinder device for novel split Hopkinson pressure bar active confining pressure experiment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510076422.1A CN104677725A (en) | 2015-02-13 | 2015-02-13 | Confining pressure cylinder device for novel split Hopkinson pressure bar active confining pressure experiment |
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| CN104677725A true CN104677725A (en) | 2015-06-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109187926A (en) * | 2018-09-18 | 2019-01-11 | 太原理工大学 | Three axis seepage flow test device of fractured coal and rock and desorption-diffusion-seepage tests system |
| CN112268806A (en) * | 2020-10-14 | 2021-01-26 | 合肥工业大学 | Confining pressure loading device based on separated Hopkinson pressure bar |
| CN115498382A (en) * | 2022-09-27 | 2022-12-20 | 武汉凡谷电子技术股份有限公司 | Filter |
Citations (6)
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|---|---|---|---|---|
| EP1065492A2 (en) * | 1999-07-02 | 2001-01-03 | Sumitomo Rubber Industries Ltd. | Split Hopkinson bar testing apparatus and method |
| JP2002082031A (en) * | 2000-09-05 | 2002-03-22 | Ishikawajima Harima Heavy Ind Co Ltd | Hopkinson bar testing apparatus |
| CN202837089U (en) * | 2012-09-29 | 2013-03-27 | 张磊 | Confinement cylinder device of Hopkinson pressure bar active confinement experiment |
| CN103471906A (en) * | 2013-08-24 | 2013-12-25 | 中国人民解放军陆军军官学院 | Retaining ring used for preventing rod piece from moving outwards during Hopkinson pressure bar confining pressure test |
| CN103616279A (en) * | 2013-11-13 | 2014-03-05 | 中国人民解放军空军工程大学 | Circumferential pressurizing device for large-diameter Hopkinson pressure bar |
| CN204389284U (en) * | 2015-02-13 | 2015-06-10 | 洛阳利维科技有限公司 | The confined pressure cylinder assembly of a kind of novel Hopkinson pressure bar active confined pressure experiment |
-
2015
- 2015-02-13 CN CN201510076422.1A patent/CN104677725A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1065492A2 (en) * | 1999-07-02 | 2001-01-03 | Sumitomo Rubber Industries Ltd. | Split Hopkinson bar testing apparatus and method |
| JP2002082031A (en) * | 2000-09-05 | 2002-03-22 | Ishikawajima Harima Heavy Ind Co Ltd | Hopkinson bar testing apparatus |
| CN202837089U (en) * | 2012-09-29 | 2013-03-27 | 张磊 | Confinement cylinder device of Hopkinson pressure bar active confinement experiment |
| CN103471906A (en) * | 2013-08-24 | 2013-12-25 | 中国人民解放军陆军军官学院 | Retaining ring used for preventing rod piece from moving outwards during Hopkinson pressure bar confining pressure test |
| CN103616279A (en) * | 2013-11-13 | 2014-03-05 | 中国人民解放军空军工程大学 | Circumferential pressurizing device for large-diameter Hopkinson pressure bar |
| CN204389284U (en) * | 2015-02-13 | 2015-06-10 | 洛阳利维科技有限公司 | The confined pressure cylinder assembly of a kind of novel Hopkinson pressure bar active confined pressure experiment |
Non-Patent Citations (1)
| Title |
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| 赵鹏铎: "分离式霍普金森压剪杆实验技术及其应用研究", 《中国博士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109187926A (en) * | 2018-09-18 | 2019-01-11 | 太原理工大学 | Three axis seepage flow test device of fractured coal and rock and desorption-diffusion-seepage tests system |
| CN109187926B (en) * | 2018-09-18 | 2021-04-20 | 太原理工大学 | Three-axis seepage test device for fractured coal rock mass and desorption-diffusion-seepage test system |
| CN112268806A (en) * | 2020-10-14 | 2021-01-26 | 合肥工业大学 | Confining pressure loading device based on separated Hopkinson pressure bar |
| CN112268806B (en) * | 2020-10-14 | 2023-04-14 | 合肥工业大学 | Confining pressure loading device based on separated Hopkinson pressure bar |
| CN115498382A (en) * | 2022-09-27 | 2022-12-20 | 武汉凡谷电子技术股份有限公司 | Filter |
| CN115498382B (en) * | 2022-09-27 | 2023-07-14 | 武汉凡谷电子技术股份有限公司 | Filter |
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Application publication date: 20150603 |