CN112082881A - Heating device of Hopkinson bar - Google Patents
Heating device of Hopkinson bar Download PDFInfo
- Publication number
- CN112082881A CN112082881A CN201910515507.3A CN201910515507A CN112082881A CN 112082881 A CN112082881 A CN 112082881A CN 201910515507 A CN201910515507 A CN 201910515507A CN 112082881 A CN112082881 A CN 112082881A
- Authority
- CN
- China
- Prior art keywords
- heating
- sleeve
- hopkinson bar
- sample piece
- piece
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention provides a heating device of a Hopkinson bar, which comprises the Hopkinson bar and a sample piece, wherein the sample piece is arranged on the inner side of the Hopkinson bar; the heating upper sleeve is arranged at the top of the sample piece, the heating lower sleeve is arranged at the bottom of the sample piece, and the heating upper sleeve and the heating lower sleeve are connected up and down and surround the periphery of the sample piece; the upper resistance arc piece is arranged between the upper heating sleeve and the sample piece, the lower resistance arc piece is arranged between the lower heating sleeve and the sample piece, and two ends of the upper resistance arc piece and the lower resistance arc piece are both connected with wires; and both ends of the upper heating sleeve and the lower heating sleeve are coated with heat-insulating coatings, so that the sample piece is uniformly heated in the upper heating sleeve and the lower heating sleeve. According to the invention, the heating sleeve arranged on the inner side of the Hopkinson bar and the heating arc sheet arranged on the inner side of the heating sleeve can be in full contact with the sample to heat the sample, so that the sample is heated uniformly, the heating time is reduced, and the working efficiency and the temperature control accuracy are improved.
Description
Technical Field
The invention relates to the field of manufacturing equipment, in particular to a heating device for a Hopkinson bar.
Background
In the prior art, a Hopkinson bar is a high-strain-rate test by applying a one-dimensional stress wave theoryThe experimental apparatus of (1). The Hopkinson bar experiment technology is the most main and reliable experiment method for researching the mechanical property of the material under the condition of high strain rate, and is an important component of the explosion and impact dynamics experiment technology. Not only can high strain rate (10) be achieved with hopkinson bars2-104s-1) Uniaxial tension, compression, shear loading, and also dynamic compression-shear composite loading, complex loading such as active and passive confining pressure, and 10-102s-1And (4) loading at a medium strain rate.
When the existing Hopkinson bar is heated, the Hopkinson bar cannot be heated uniformly, and the heating time of the Hopkinson bar is prolonged. And the heating sleeve pipe is structure as an organic whole usually, and after the experiment was accomplished to a sample, inconvenient new sample that changes, this problem that has just increased the experimental time of hopkinson pole experiment.
In addition, at present, a method of transferring a sample after independent heating is mostly adopted to carry out a Hopkinson bar high-temperature test, so that the test efficiency is reduced, and the temperature accuracy is low.
Therefore, the existing Hopkinson bar has the following problems when being heated:
firstly, the Hopkinson bar cannot be heated uniformly, so that the heating time of the Hopkinson bar is prolonged;
the heating sleeve is of an integrated structure, so that after one sample is tested, the sample is inconvenient to replace, and the test time of the Hopkinson bar test is prolonged;
and thirdly, the sample is heated outside the device and then transferred to the device for testing, so that the testing time is prolonged, and the testing temperature accuracy is reduced.
In view of the above, those skilled in the art have developed a new heating device structure of hopkinson bar in order to overcome the above technical problems.
Disclosure of Invention
The invention aims to overcome the defects that a Hopkinson bar is not uniformly heated, is long in heating time and is inconvenient to replace a new sample in the prior art, and provides a Hopkinson bar heating device.
The invention solves the technical problems through the following technical scheme:
a heating device of a Hopkinson bar, characterized in that, the heating device of the Hopkinson bar comprises:
the device comprises a Hopkinson bar and a sample piece, wherein the sample piece is arranged on the inner side of the Hopkinson bar;
the heating upper sleeve and the heating lower sleeve are arranged at the top of the sample piece, the heating lower sleeve is arranged at the bottom of the sample piece, and the heating upper sleeve and the heating lower sleeve are connected up and down and surround the periphery of the sample piece;
the resistance upper arc piece is arranged between the heating upper sleeve and the sample piece, the resistance lower arc piece is arranged between the heating lower sleeve and the sample piece, and two ends of the resistance upper arc piece and two ends of the resistance lower arc piece are both connected with wires;
and heat-insulating coatings are coated on two ends of the upper heating sleeve and the lower heating sleeve, so that the sample piece is uniformly heated in the upper heating sleeve and the lower heating sleeve.
According to an embodiment of the invention, a pair of supporting blocks is respectively arranged at two ends of the outer surface of the heating upper sleeve, each pair of supporting blocks is symmetrically arranged at two sides of the end part of the outer surface of the heating upper sleeve, a connecting column is arranged at the outer side of each supporting block, and a pull rod is connected between the surfaces of the connecting columns.
According to one embodiment of the invention, the upper surface of the heating lower sleeve is provided with a limiting protrusion corresponding to the position of the supporting block, the bottom end surface of the heating upper sleeve is provided with a limiting groove corresponding to the limiting protrusion, and the limiting protrusion is clamped with the limiting groove, so that the heating upper sleeve and the heating lower sleeve are connected into a whole.
According to one embodiment of the invention, the inner side surface of the connecting column is provided with a fixing bolt, a fixing groove is formed in the limiting protrusion, and the fixing bolt is arranged in the corresponding fixing groove.
According to one embodiment of the present invention, the connecting column and the fixing bolt are of a one-piece structure.
According to one embodiment of the invention, a return spring is arranged between the corresponding connecting column and the supporting block, and two ends of the return spring respectively abut against the connecting column and the fixing bolt.
According to one embodiment of the invention, the thermal insulating coating is a calcium carbonate coating.
According to one embodiment of the invention, the surface of the pull rod is provided with a pull ring.
According to one embodiment of the invention, the pull ring and the pull rod are of a one-piece structure.
According to one embodiment of the invention, the bottom of the heating lower casing is provided with a support base.
The positive progress effects of the invention are as follows:
the heating device of the Hopkinson bar has the following advantages:
firstly, the heating sleeve arranged on the inner side of the Hopkinson bar and the heating arc sheet arranged on the inner side of the heating sleeve can be in full contact with a sample to heat the sample, so that the sample is heated uniformly, and the heating time is shortened;
the split heating sleeve is convenient to assemble, a sample is convenient to place, fix and heat, the sample can be conveniently replaced after the experiment is finished, and the experiment time of the Hopkinson bar experiment is reduced;
and thirdly, the heating sleeve for directly heating the sample is arranged, so that the sample can be tested at a preset temperature, and the working efficiency and the temperature control accuracy are improved.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings in which like reference numerals denote like features throughout the several views, wherein:
fig. 1 is a front view of a heating device of a hopkinson bar of the present invention.
Fig. 2 is a right side view of a hopkinson bar of the present invention.
Fig. 3 is an enlarged view of a portion a in fig. 2.
[ reference numerals ]
Hopkinson bar 10
Heating the upper sleeve 30
Heating the lower sleeve 40
Resistor upper arc piece 50
Wire 70
Supporting block 31
Connecting post 32
Limiting groove 34
Fixing bolt 35
Fixing groove 42
Return spring 36
Pull ring 37
Supporting base 43
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.
Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.
Fig. 1 is a front view of a heating device of a hopkinson bar of the present invention.
Fig. 2 is a right side view of a hopkinson bar of the present invention.
Fig. 3 is an enlarged view of a portion a in fig. 2.
As shown in fig. 1 to 3, the present invention discloses a heating device for a hopkinson bar, which comprises a hopkinson bar 10, a sample piece 20, a heating upper sleeve 30, a heating lower sleeve 40, a resistance upper arc piece 50 and a resistance lower arc piece 60, wherein the sample piece 20 is arranged inside the hopkinson bar 10. The upper heating sleeve 30 is arranged at the top of the sample piece 20, the lower heating sleeve 40 is arranged at the bottom of the sample piece 20, and the upper heating sleeve 30 and the lower heating sleeve 40 are connected up and down and are arranged around the periphery of the sample piece 20.
The upper resistance arc piece 50 is arranged between the upper heating sleeve 30 and the sample piece 20, the lower resistance arc piece 60 is arranged between the lower heating sleeve 40 and the sample piece 20, and both ends of the upper resistance arc piece 50 and the lower resistance arc piece 60 are connected with the lead 70.
Both ends of the upper heating sleeve 30 and the lower heating sleeve 40 are coated with the thermal insulation coating 80, so that the sample piece 20 is uniformly heated in the upper heating sleeve 30 and the lower heating sleeve 40.
Preferably, a pair of supporting blocks 31 are respectively provided at both ends of the outer surface of the heating upper sleeve 30, each pair of supporting blocks 31 is symmetrically arranged at both sides of the end of the outer surface of the heating upper sleeve 30, a connecting column 32 is provided at the outer side of each supporting block 31, and a pull rod 33 is connected between the surfaces of the connecting columns 32.
Furthermore, a limiting protrusion 41 corresponding to the supporting block 31 is disposed on the upper surface of the lower heating sleeve 40, a limiting groove 34 corresponding to the limiting protrusion 41 is disposed on the bottom end surface of the upper heating sleeve 30, and the limiting protrusion 41 is tightly clamped with the limiting groove 34, so that the upper heating sleeve 30 and the lower heating sleeve 40 are connected into a whole.
The inner side surface of the connecting column 32 is provided with a fixing bolt 35, a fixing groove 42 is arranged in the limiting protrusion 41, and the fixing bolt 35 is arranged in the corresponding fixing groove 42. This may allow for easier removal and installation between the upper heating jacket 30 and the lower heating jacket 40.
In order to facilitate the movement of the connection column 32, the connection column 32 and the fixing bolt 35 are integrated. A return spring 36 is arranged between the corresponding connecting column 32 and the supporting block 31, so that two ends of the return spring 36 respectively abut against the connecting column 32 and the fixing bolt 35.
More preferably, the thermal insulating coating 80 is preferably a calcium carbonate coating.
In addition, the pull ring 37 is arranged on the surface of the pull rod 33, and the pull rod 33 and the connecting column 32 can be fixed by welding, so that the pull rod 33 and the connecting column 32 are fixed more firmly. The pull ring 37 and the pull rod 33 are preferably of a one-piece construction, which makes the coupling of the pull ring 37 and the pull rod 33 tighter. The bottom of the heating lower sleeve 40 is provided with a support base 43.
Similarly, the supporting block 31 and the heating upper sleeve 30 are fixed by welding, so that the supporting block 31 and the heating upper sleeve 30 are fixedly fastened.
According to the structural description, the working principle and the using process of the heating device of the Hopkinson bar are as follows:
the supporting base 43 is fixed on the platform to support the lower heating sleeve 40, then the sample piece 20 is placed on the lower resistance arc piece 60 at the top of the lower heating sleeve 40, and the pull ring 37 is grasped to pull the pull rod 33 outwards.
At this time, the connecting rod 32 moves together with the pull rod 33, and the fixing pin 35 moves together with the connecting rod 32 to be separated from the limiting groove 34. The upper heating sleeve 30 is placed on top of the lower heating sleeve 40, and then the upper heating sleeve 30 is moved downward so that the position-limiting protrusion 41 is aligned with the position-limiting groove 34 and then is caught.
Then the pull ring 37 is released, and the return spring 36 pulls the connecting column 32 to move toward the supporting block 31, and the fixing pin 35 moves toward the inside of the fixing groove 42 to be engaged, so that the heating upper sleeve 30 is assembled with the heating lower sleeve 40.
Therefore, the lower arc piece 60 and the upper arc piece 50 of the resistor can be contacted with the sample piece 20, and the lead 70 is communicated with two poles of a power supply, so that the lower arc piece 60 and the upper arc piece 50 of the resistor are heated to heat the sample piece 20.
The calcium carbonate coatings at the two ends of the upper heating sleeve 30 and the lower heating sleeve 40 can play a role in separation and heat preservation, so that the heating sleeve can be prevented from heating the Hopkinson bar 10, and meanwhile, a heat preservation effect is also played.
After the heating is completed, the Hopkinson bar 10 is enabled to impact the sample piece 20 to complete the experiment, and then the sample piece 20 is replaced according to the placing step of the sample piece 20 to continue the experiment.
In summary, the heating device of the hopkinson bar of the present invention has the following advantages:
firstly, the heating sleeve arranged on the inner side of the Hopkinson bar and the heating arc sheet arranged on the inner side of the heating sleeve can be in full contact with a sample to heat the sample, so that the sample is heated uniformly, and the heating time is shortened;
the split heating sleeve is convenient to assemble, a sample is convenient to place, fix and heat, the sample can be conveniently replaced after the experiment is finished, and the experiment time of the Hopkinson bar experiment is reduced;
and thirdly, the heating sleeve for directly heating the sample is arranged, so that the sample can be tested at a preset temperature, and the working efficiency and the temperature control accuracy are improved.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (10)
1. A heating device of a Hopkinson bar, characterized in that the heating device of the Hopkinson bar comprises:
the device comprises a Hopkinson bar and a sample piece, wherein the sample piece is arranged on the inner side of the Hopkinson bar;
the heating upper sleeve and the heating lower sleeve are arranged at the top of the sample piece, the heating lower sleeve is arranged at the bottom of the sample piece, and the heating upper sleeve and the heating lower sleeve are connected up and down and surround the periphery of the sample piece;
the resistance upper arc piece is arranged between the heating upper sleeve and the sample piece, the resistance lower arc piece is arranged between the heating lower sleeve and the sample piece, and two ends of the resistance upper arc piece and two ends of the resistance lower arc piece are both connected with wires;
and heat-insulating coatings are coated on two ends of the upper heating sleeve and the lower heating sleeve, so that the sample piece is uniformly heated in the upper heating sleeve and the lower heating sleeve.
2. The heating apparatus of Hopkinson bar as recited in claim 1, wherein a pair of support blocks are respectively provided at both ends of the outer surface of said heating upper sleeve, each pair of said support blocks are symmetrically arranged at both sides of the end portion of the outer surface of said heating upper sleeve, a connection column is provided at the outer side of each of said support blocks, and a tension bar is connected between the surfaces of said connection columns.
3. The heating device of Hopkinson bar as recited in claim 2, wherein said upper surface of said heating lower sleeve is provided with a position-limiting protrusion corresponding to said supporting block, and said bottom end surface of said heating upper sleeve is provided with a position-limiting groove corresponding to said position-limiting protrusion, said position-limiting protrusion being engaged with said position-limiting groove, so that said heating upper sleeve and said heating lower sleeve are integrally connected.
4. The heating device of Hopkinson bar as recited in claim 3, wherein fixing pins are mounted on the inner side surfaces of said connecting posts, fixing grooves are formed in said limiting protrusions, and said fixing pins are mounted in the corresponding fixing grooves.
5. The heating device of Hopkinson bar as recited in claim 4, wherein said connecting column and said fixing pin are of an integral structure.
6. The heating device of Hopkinson bar as recited in claim 5, wherein a return spring is disposed between the corresponding connecting column and the supporting block, and both ends of the return spring are respectively abutted against the connecting column and the fixing bolt.
7. The hopkinson bar heating apparatus of claim 1, wherein the thermal insulating coating is a calcium carbonate coating.
8. The heating device of hopkinson bar of claim 2, wherein the surface of the pull bar is provided with a pull ring.
9. The hopkinson bar heating apparatus of claim 8, wherein the pull ring and the pull rod are of a unitary construction.
10. The heating device of Hopkinson bar as recited in any one of claims 1 to 9, wherein a support base is provided at the bottom of said heating lower sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515507.3A CN112082881A (en) | 2019-06-14 | 2019-06-14 | Heating device of Hopkinson bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910515507.3A CN112082881A (en) | 2019-06-14 | 2019-06-14 | Heating device of Hopkinson bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112082881A true CN112082881A (en) | 2020-12-15 |
Family
ID=73733890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910515507.3A Pending CN112082881A (en) | 2019-06-14 | 2019-06-14 | Heating device of Hopkinson bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112082881A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114965099A (en) * | 2022-05-18 | 2022-08-30 | 合肥工业大学 | Device and method for testing interlaminar shear strength of fiber reinforced composite material |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018094A (en) * | 2012-12-25 | 2013-04-03 | 湖南科技大学 | Device for rapid-heating quasi-static high-temperature Hopkinson pressure bar experiment |
| CN105699169A (en) * | 2016-04-21 | 2016-06-22 | 安徽理工大学 | Quick heating device for high-temperature SHPB dynamic impact experiment |
| CN108036996A (en) * | 2017-11-14 | 2018-05-15 | 河海大学 | For the more size rock sample nonstorage calorifiers of SHPB impact tests |
| CN208124792U (en) * | 2018-02-07 | 2018-11-20 | 江西保利制药有限公司 | A kind of pharmaceutical purpose heated-air circulation oven |
| CN208223987U (en) * | 2018-06-12 | 2018-12-11 | 安徽理工大学 | Hot environment case for split hopkinson press bar experimental rig |
| CN208336610U (en) * | 2018-06-27 | 2019-01-04 | 湖州迈思自动化科技有限公司 | A kind of anti-disengagement structure of Internet of Things intelligent socket |
-
2019
- 2019-06-14 CN CN201910515507.3A patent/CN112082881A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018094A (en) * | 2012-12-25 | 2013-04-03 | 湖南科技大学 | Device for rapid-heating quasi-static high-temperature Hopkinson pressure bar experiment |
| CN105699169A (en) * | 2016-04-21 | 2016-06-22 | 安徽理工大学 | Quick heating device for high-temperature SHPB dynamic impact experiment |
| CN108036996A (en) * | 2017-11-14 | 2018-05-15 | 河海大学 | For the more size rock sample nonstorage calorifiers of SHPB impact tests |
| CN208124792U (en) * | 2018-02-07 | 2018-11-20 | 江西保利制药有限公司 | A kind of pharmaceutical purpose heated-air circulation oven |
| CN208223987U (en) * | 2018-06-12 | 2018-12-11 | 安徽理工大学 | Hot environment case for split hopkinson press bar experimental rig |
| CN208336610U (en) * | 2018-06-27 | 2019-01-04 | 湖州迈思自动化科技有限公司 | A kind of anti-disengagement structure of Internet of Things intelligent socket |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114965099A (en) * | 2022-05-18 | 2022-08-30 | 合肥工业大学 | Device and method for testing interlaminar shear strength of fiber reinforced composite material |
| CN114965099B (en) * | 2022-05-18 | 2023-09-29 | 合肥工业大学 | Device and method for testing interlaminar shear strength of fiber reinforced composite material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7363822B2 (en) | Technique for applying direct resistance heating current to a specific location in a specimen under test while substantially reducing thermal gradients in the specimen gauge length | |
| US11460386B2 (en) | Heating apparatus for material testing machine | |
| CN202057556U (en) | Bending corrosion fatigue tester | |
| CN109030196B (en) | Metal material uniaxial creep resistance test sample, clamp and method | |
| CN103529072B (en) | A kind of apparatus and method measuring interfacial heat transfer coefficient between thermal deformation workpiece and mould | |
| CN201020356Y (en) | Temperature measuring and controlling device in hexahedral top pressure airtight synthetic cavity | |
| CN102288482B (en) | High temperature tensile clamp | |
| CN112082881A (en) | Heating device of Hopkinson bar | |
| CN102735902A (en) | High-temperature superconducting wire tensile force testing device and testing method thereof | |
| CN107421807A (en) | A kind of compression clamp and method of the measurement of small size plastic material high temperature compressive yield strength | |
| CN111380427A (en) | Missile full-missile double-station parallel excitation reliability test method and system based on comprehensive stress | |
| CN104677756A (en) | Synthetical fatigue testing system and method for extensional vibration and torsion of composite insulator | |
| Mammano et al. | Functional fatigue of NiTi Shape Memory wires for a range of end loadings and constraints | |
| CN203572727U (en) | Comprehensive fatigue test system of stretching vibration and torsion of composite insulator | |
| CN112382421B (en) | Test device for simulating nuclear reactor fuel rod | |
| CN106706244B (en) | A kind of antidetonation shearing removing repeatitive loading tests device | |
| JP6049378B2 (en) | Fatigue testing equipment | |
| CN214379832U (en) | Cable protection sleeve device | |
| CN105651414B (en) | A kind of temperature sensor enhancing tensile strength | |
| CN110346615B (en) | Low-temperature alternating/direct current electrical property testing device | |
| US9108267B2 (en) | Pulse electric-current bonding method and pulse electric-current bonding apparatus | |
| CN206908244U (en) | Strain clamp | |
| CN203104828U (en) | Rapid heating device for high-temperature Hopkinson pressure bar experiment | |
| CN112147007A (en) | High-temperature fatigue test device | |
| CN204584029U (en) | A kind of multidirectional compression test mould |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |