CN105973725A - Freezing and cryogenic impact testing device for Hopkinson pressure bar - Google Patents
Freezing and cryogenic impact testing device for Hopkinson pressure bar Download PDFInfo
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- CN105973725A CN105973725A CN201610478412.5A CN201610478412A CN105973725A CN 105973725 A CN105973725 A CN 105973725A CN 201610478412 A CN201610478412 A CN 201610478412A CN 105973725 A CN105973725 A CN 105973725A
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- 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
- G01N1/42—Low-temperature sample treatment, e.g. cryofixation
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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
- G01N3/30—Investigating strength properties of solid materials by application of mechanical stress by applying a single impulsive force, e.g. by falling weight
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a freezing and cryogenic impact testing device for a Hopkinson pressure bar. The freezing and cryogenic impact testing device comprises a cryogenic experimental cabin, a condensing pipe, a push rod, a supporting bracket, a plurality of sample loading units, a plurality of roller shafts and a partition board, wherein the cryogenic experimental cabin is divided into an upper test chamber and a lower test chamber; the roller shafts are mounted inside the lower test chamber; the plurality of sample loading units are placed on the roller shafts respectively; during a test, each sample is placed on the upper surface of each sample loading unit; a supporting bracket platform of the supporting bracket is positioned at one end of the lower test chamber; a supporting bracket operating rod of the supporting bracket downwardly stretches out of a box body of the freezing and cryogenic impact testing device; one end of the push rod runs through a shell of the lower test chamber and is positioned inside the lower test chamber, and the push rod is as high as trays; and the other end of the push rod is positioned outside the shell of the lower test chamber. The freezing and cryogenic impact testing device is a testing device capable of achieving synchronization of a cryogenic freezing test and a cryogenic impact test so as to measure cryogenic dynamic mechanical properties of a material efficiently and accurately, and has the characteristics of high reliability and simple structure.
Description
Technical field
The present invention relates to a kind of freezing and low-temperature impact test device for Hopkinson pressure bar, belong to the mechanics of materials
Can technical field of measurement and test.
Background technology
Split hopkinson press bar (Split Hopkinson Pressure Bar) experimental technique is high in research answering
The experimental technique main, most reliable of material mechanical performance under variability, split hopkinson press bar experimental provision has knot
Structure is simple and convenient to operate, measure the advantages such as exquisiteness, various loading techniques, measuring technology and the data processing method related to also than
More ripe.
The strain rate sensitivity of common engineering material is 102～104s-1Strain rate in the range of change relatively violent, therefore
Split hopkinson press bar has become as most basic a kind of experimental provision of material kinetics performance test.It addition, low temperature
Environment has appreciable impact to material mechanical performance, such as porous Jie such as the low temperature cold fragility of metal, concrete, rock and ground
The low temperature frost heave etc. of matter, thus be accordingly used in the cryogenic test equipment of split hopkinson press bar have significant construction value with
Academic significance.
At present, existing many technical staff and scientific research institutions combine the project characteristic of self and devise low temperature test device,
Such as: the utility model low temperature Hopkinson pressure bar test controllable constant-temperature experimental provision of Ma Qinyong；The practicality of duties institute of air force
The novel low-temperature insulation device for split hopkinson press bar test；The utility model Hopkinson examination of Institutes Of Technology Of Nanjing
Test specimen appliance；A kind of cooling system realizing Hopkinson pressure bar low-temperature impact of the utility model of University Of Science and Technology Of Hunan；China
The utility model one Hopkinson bar low temperature test device etc. of Civil Aviation Flight institute；Above utility model all has structure
Simply, the advantage such as lightweight, easy to use, experimenter can be made to be under normal temperature environment and to carry out low-temperature test, and ensure sample
Required low temperature environment.But the experimental provision of split hopkinson press bar impact test is simply under above cryogenic conditions
There is provided low temperature environment or heat insulation function for individual sample, there is inefficiency, energy consumption is higher and disturbs low-temperature test environment
Dynamic big deficiency.
Owing to split hopkinson bar impact experiment has experiment, interruption is carried out, the single experiment time is short, experiment number
The features such as many, and when carrying out low temperature test, material test specimen, test club temperature sensitive degree height, accordingly, it would be desirable to one is by some
Sample freeze the low-temperature impact test synchronization implementation with sample, it is achieved without the temperature difference, quickly provide the separate type of test sample suddenly
Pu Jinsen depression bar cryogenic test equipment, is used for the most accurately measuring the low-temperature dynamic mechanical property of material.China Mining University is just
A kind of low temperature test device for Hopkinson bar of this setting designing, this device is at conventional split hopkinson press bar
Test specimen storage unit and drive system model has been installed additional, it is possible to realize freezing and low temperature of test specimen on the basis of low temperature test device
The function of impact test synchronization implementation, but it is complicated to there is apparatus structure, especially drive system model processing, installation difficulty are bigger
Problem, meanwhile, behind test specimen storage unit shift position, owing to the bottom of device is opened, cause thermal environment to deteriorate.
Thus, how realize multispecimen freeze with low-temperature impact test synchronization implementation while optimize apparatus structure,
Reduce the heat transfer in test, raising test efficiency is the problem that under cryogenic conditions, Hopkinson pressure bar test needs to solve.
Summary of the invention
Apparatus structure for overcoming prior art to exist is complicated, and processing, installation difficulty are relatively big, and test efficiency is low,
The deficiency that energy consumption is higher and big to low-temperature test environmental perturbation, the present invention proposes a kind of freezing for Hopkinson pressure bar
With low-temperature impact test device.
The present invention includes low temperature test cabin, condensing tube, push rod, bracket, multiple sample load bearing unit, roller bearing and dividing plate.Institute
State low temperature test cabin and be divided into upper strata test cavity and lower floor's test cavity；Described upper strata test cavity is used for low-temperature impact test；Under described
Layer test cavity is for the sharp freezing test of sample.In described low temperature test cabin, housing outer surface is wound with condensing tube.Roller bearing is pacified
Being contained in lower floor's test cavity, outward flange is away from lower floor test cavity plate inner surface 5mm.Multiple sample load bearing units are individually positioned in rolling
On axle；During test, each sample is individually positioned in the upper surface of each sample load bearing unit.The platform bracket of bracket is positioned at described lower floor
One end of test cavity, is in the underface of dividing plate；The bracket action bars of bracket extends downward outside device box.One end of push rod
It is positioned at this lower floor's test cavity through described lower floor test cavity housing, and makes the height of this push rod identical with the height of pallet；Push away
The other end of bar is positioned at outside this lower floor's test cavity housing.Described push rod and described bracket lay respectively at the two of lower floor's test cavity housing
End.
Described each sample load bearing unit is collectively constituted by a pallet and an arc cushion block respectively, and each pallet is respectively
It is placed on roller bearing；Each arc cushion block is individually positioned on each pallet.
The upper surface in the basal surface of described pallet and platform bracket face is at grade.
A hermatic door respectively it is embedded with on the housing at test cavity two ends, described upper strata.Lower floor's test cavity is provided with bracket one end
Casing lateral surfaces dodge gate is installed.
Described condensing tube is wound in the outer surface in low temperature test cabin, and input stretches out from the same side of casing with outfan,
Extension condensing tube is wrapped up by heat-insulation layer.Described casing is made up of shell and thermal insulation layer, and shell therein is made up of sheet metal,
Thermal insulation layer is made up of the material with heat insulation moisture-keeping functions.
The arrangement density of described roller bearing must ensure have no less than three roller bearings under each pallet.
The present invention is capable of the sharp freezing test of material sample and the assay device of low-temperature impact test synchronization implementation,
The most accurately to measure the assay device of the low-temperature dynamic mechanical property of material.
The beneficial effect that the present invention obtains shows:
1, the design of storage cabin, Laboratory Module double-decker and succinct sample transfer organization cleverly is relied on to realize Hopkinson pressure
In bar low-temperature impact test, the sharp freezing of sample and low-temperature impact synchronization implementation, reliably ensure that sample is in setting all the time
Low temperature environment.
2, present configuration be simple and convenient to operate, dependable performance, quickness and high efficiency, through practice test, the present invention can be
Realize in 10min that 7 pieces are freezed the sample after processing and carry out impact test, and ensure that the omnidistance temperature stabilization of test, take
Obtained good test operation effect.
3, present configuration is compact, compact, is favorably improved K cryogenic treatment efficiency, reaches quickly to carry out low to sample
The purpose that temperature processes.
4, the increasing as split hopkinson press bar assay device additionally arranges standby, and profile and volume that the present invention is small and exquisite make
Installing additional in split hopkinson press bar pilot system is more convenient, and the requirement to steric requirements is lower.
5, compared to the experimental provision of split hopkinson press bar impact test under existing cryogenic conditions, the present invention exists
On the premise of realizing sample preparation and impact test synchronization, structure is the most succinct, relies between simple, practical structure exquisite
Contact, it is achieved that functions expanding and optimization so that device is relatively reliable, it is easy to safeguard.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the present invention coordinates with split hopkinson press bar；
Fig. 2 is the structural representation of the present invention；
Fig. 3 is the forward sectional view of Fig. 2；
Fig. 4 is the side view of Fig. 3；
Fig. 5 is the structural representation of hermatic door；
Fig. 6 is the structural representation of arc cushion block；
Fig. 7 is the schematic diagram that dividing plate is chimeric with low temperature test cabin；
Fig. 8 is that sample shifts schematic diagram, and wherein in Fig. 8 a, sample sample in lower floor's test cavity, Fig. 8 b is tested on upper strata
Chamber.In figure:
1. shell；2. thermal insulation layer；3. low temperature test cabin；4. condensing tube；5. sample；6. hermatic door；7. dividing plate；8. movable
Door；9. pallet；10. bracket；11. arc cushion blocks；12. roller bearings；13. heat-insulation layers；14. push rods；15. incident bars；16. transmission bars.
Detailed description of the invention
The present embodiment is a kind of freezing and low-temperature impact test device for Hopkinson pressure bar.
Such as Fig. 1, the incident bar 15 of the present embodiment and split hopkinson press bar experimental provision and transmission bar 16 coordinate to be made
With, it is provided that a kind of freezing and low-temperature impact test device for split hopkinson press bar.
The present embodiment includes low temperature test cabin 3,4, two hermatic doors 6 of condensing tube, dodge gate 8, push rod 14 and bracket 10, many
Individual arc cushion block 11 and multiple pallet 9, roller bearing 12 and dividing plate 7；The quantity of described arc cushion block is identical with the quantity of pallet.Described
Low temperature test cabin 3 includes between upper strata test cavity and lower floor's test cavity, and upper strata test cavity and lower floor's test cavity by dividing plate 7
Separate.Test cavity cross section, described upper strata is the shape of a hoof, for low-temperature impact test；Described lower floor's test cavity cross section is rectangle, uses
If the sharp freezing in dry sample 5 is tested.In described low temperature test cabin 3, housing outer surface is wound with condensing tube 4.Roller bearing 12 is installed
In lower floor's test cavity, outward flange is away from lower floor test cavity plate inner surface 5mm.Each pallet 9 is individually positioned on roller bearing 12；Each arc
Shape cushion block 11 is not placed on each pallet 9, is i.e. collectively constituted a sample carrying list by a pallet and an arc cushion block
Unit；The quantity of the sample cell formed is identical with the quantity of pallet.Some sample cells are placed side by side in low temperature test cabin 3 times
On roller bearing 12 in layer test cavity.Each sample 5 is individually positioned on each arc cushion block 11.The platform bracket of bracket 10 is positioned at described
One end of lower floor's test cavity, is in the underface of dividing plate 7；The bracket action bars of bracket 10 extends downward outside device box, uses
With manual transfer sample cell.
The upper surface in the basal surface of pallet and platform bracket face at grade, to facilitate push rod 14 to promote pallet 9 to move
Move to the platform bracket of bracket 10.One end of push rod 14 is positioned at this lower floor's test cavity through described lower floor test cavity housing,
And make the height of this push rod identical with the height of pallet 9；The other end of push rod is positioned at outside this lower floor's test cavity housing.Described push rod
With the two ends that described bracket 10 lays respectively at lower floor's test cavity housing.
During test, sample 5 is manually moved to upper strata test cavity by bracket 10 from lower floor's test cavity；Upper strata test cavity two
A hermatic door 6 respectively it is embedded with on the housing of end.Lower floor's test cavity is provided with that the casing lateral surfaces of bracket 10 one end is provided with can
The dodge gate 8 rotated.
Described condensing tube 4 is wound in the outer surface in low temperature test cabin 3, and input is stretched from the same side of casing with outfan
Going out, extension condensing tube is wrapped up by heat-insulation layer 13.Described casing is made up of shell 1 and thermal insulation layer 2, and shell 1 therein is by thin
Steel plate is made, and thermal insulation layer 2 is made up of the material with heat insulation moisture-keeping functions.
Described hermatic door 6 is identical with casing with the material structure of dodge gate 8, and outer side of door is the most with handles.Described sealing
Door 6 is detachable, and profile is the shape of a hoof, is positioned at the upper strata test cavity hatch door in low temperature test cabin 3, and can be fitted together to into this hatch door
In.Described dodge gate 8 is connected with casing by loose-leaf, rotates for axle with loose-leaf, and then realizes the switch of dodge gate.
Described push rod 14 stretches into lower floor's test cavity in low temperature test cabin 3 from casing one end, and offsets in pallet 9, by moving
Dynamic push rod promotes pallet, and then drives arc cushion block 11 and sample 5 to move on the platform of bracket 10.The profile of described bracket 10
" T " shape, platform bracket and vertical bracket action bars by level form.By move up and down bracket thus realize sample from
Lower floor's test cavity in low temperature test cabin 3 is toward the transfer of upper strata test cavity.
Described arc cushion block 11, is made up of cold resistant rubber, is cambered surface with sample contacts part, encloses sample to reduce
Pressure effect, is the Stabilization that wide plane plays pedestal with pallet contact portion.Described pallet 9 is rectangular sheet, plays and takes
Carry the effect of sample 5.
Described roller bearing 12 is arranged side by side on the bilge in low temperature test cabin 3, and ensures have under each pallet no less than three rollings
Axle, to realize the balanced sequence of sample on roller bearing.The edge of described dividing plate 7 embed the upper strata test cavity in low temperature test cabin 3 with under
In draw-in groove between layer test cavity, and near the hermatic door 6 of incident rod end, baffle central is fluted, has leader in groove, with
Facilitate the dismounting of this dividing plate.
During work, described sample 5, arc cushion block 11 and pallet 9 form a sample cell according to compound mode, then will
On some sample cells roller bearing 12 in low temperature test cabin 3 lower floor test cavity placed side by side, upper strata, low temperature test cabin 3 examination simultaneously
Test one sample cell of placement in chamber, realize, by condensing tube, the low temperature environment that low temperature test cabin 3 is preset, then take off hermatic door
6, by incident bar 15 and transmission bar 16 and sample 5 quick centring, and carry out impact test, after impact test completes, quick scarfing cinder
And operate push rod 14, with bracket 10, sample cell in low temperature test cabin 3 lower floor test cavity is transferred to upper strata test cavity, sample turns
Move as shown in Figure 8, and load onto the low temperature environment that hermatic door recovery upper strata test cavity is extremely preset, the most again take off hermatic door and carry out
Quick centring also does impact test.
The method have the benefit that realize in Hopkinson pressure bar low-temperature impact test the sharp freezing of sample with
Low-temperature impact synchronization implementation, sample is constantly in the low temperature environment of needs, and the present invention has simple in construction, easy to operate and quick
The feature such as efficiently.
Claims (6)
1. one kind for the freezing and low-temperature impact test device of Hopkinson pressure bar, it is characterised in that include low temperature test cabin,
Condensing tube, push rod, bracket, multiple sample load bearing unit, roller bearing and dividing plate；Described low temperature test cabin is divided into upper strata to try by dividing plate
Test chamber and lower floor's test cavity；Described upper strata test cavity is used for low-temperature impact test；Described lower floor test cavity is for the low temperature of sample
Freezing test；In described low temperature test cabin, housing outer surface is wound with condensing tube；Roller bearing is arranged in lower floor's test cavity, outward flange
Away from lower floor test cavity plate inner surface 5mm；Multiple sample load bearing units are individually positioned on roller bearing；During test, each sample is put respectively
Put the upper surface at each sample load bearing unit；The platform bracket of bracket is positioned at one end of described lower floor test cavity, is in dividing plate
Underface；The bracket action bars of bracket extends downward outside device box；One end of push rod passes described lower floor test cavity housing
It is positioned at this lower floor's test cavity, and makes the height of this push rod identical with the height of pallet；The other end of push rod is positioned at the examination of this lower floor
Test outside cavity shell；Described push rod and described bracket lay respectively at the two ends of lower floor's test cavity housing.
2. it is used for freezing and low-temperature impact test device of Hopkinson pressure bar as claimed in claim 1, it is characterised in that described
Each sample load bearing unit is collectively constituted by a pallet and an arc cushion block respectively, and each pallet is individually positioned in roller bearing
On；Each arc cushion block is individually positioned on each pallet.
3. it is used for freezing and low-temperature impact test device of Hopkinson pressure bar as claimed in claim 1, it is characterised in that described
The upper surface in the basal surface of pallet and platform bracket face is at grade.
4. it is used for freezing and low-temperature impact test device of Hopkinson pressure bar as claimed in claim 1, it is characterised in that described
A hermatic door respectively it is embedded with on the housing at test cavity two ends, upper strata；Lower floor's test cavity is provided with the casing lateral surfaces of bracket one end
Dodge gate is installed.
5. it is used for freezing and low-temperature impact test device of Hopkinson pressure bar as claimed in claim 1, it is characterised in that described
Condensing tube is wound in the outer surface in low temperature test cabin, and input stretches out from the same side of casing with outfan, and extension condenses
Pipe is wrapped up by heat-insulation layer；Described casing is made up of shell and thermal insulation layer, and shell therein is made up of sheet metal, and thermal insulation layer is by having
The material of heat insulation moisture-keeping functions is made.
6. it is used for freezing and low-temperature impact test device of Hopkinson pressure bar as claimed in claim 1, it is characterised in that described
The arrangement density of roller bearing must ensure have no less than three roller bearings under each pallet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610478412.5A CN105973725A (en) | 2016-06-27 | 2016-06-27 | Freezing and cryogenic impact testing device for Hopkinson pressure bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610478412.5A CN105973725A (en) | 2016-06-27 | 2016-06-27 | Freezing and cryogenic impact testing device for Hopkinson pressure bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105973725A true CN105973725A (en) | 2016-09-28 |
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ID=57019213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610478412.5A Pending CN105973725A (en) | 2016-06-27 | 2016-06-27 | Freezing and cryogenic impact testing device for Hopkinson pressure bar |
Country Status (1)
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|---|---|
| CN (1) | CN105973725A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644748A (en) * | 2016-10-27 | 2017-05-10 | 长春机械科学研究院有限公司 | Device suitable for compression mechanical performance test and bending mechanical performance test under high-temperature vacuum environment |
| CN110440635A (en) * | 2019-08-03 | 2019-11-12 | 广州克莱美特仪器设备科技有限公司 | A kind of dedicated embedded protecting against shock of artillery system, vibration proof high/low temperature hygrothermal environment firing test cabin |
| CN113010995A (en) * | 2021-01-26 | 2021-06-22 | 陕西科技大学 | Prediction method of coplanar impact response stress time curve of two-dimensional porous core material |
-
2016
- 2016-06-27 CN CN201610478412.5A patent/CN105973725A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106644748A (en) * | 2016-10-27 | 2017-05-10 | 长春机械科学研究院有限公司 | Device suitable for compression mechanical performance test and bending mechanical performance test under high-temperature vacuum environment |
| CN110440635A (en) * | 2019-08-03 | 2019-11-12 | 广州克莱美特仪器设备科技有限公司 | A kind of dedicated embedded protecting against shock of artillery system, vibration proof high/low temperature hygrothermal environment firing test cabin |
| CN110440635B (en) * | 2019-08-03 | 2021-09-17 | 广州克莱美特仪器设备科技有限公司 | Special embedded impact-proof and vibration-proof high-low temperature damp-heat environment shooting test chamber for artillery system |
| CN113010995A (en) * | 2021-01-26 | 2021-06-22 | 陕西科技大学 | Prediction method of coplanar impact response stress time curve of two-dimensional porous core material |
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Application publication date: 20160928 |