CN202886209U - High-temperature high-strain rate stretching synchronization experimental apparatus - Google Patents
High-temperature high-strain rate stretching synchronization experimental apparatus Download PDFInfo
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- CN202886209U CN202886209U CN 201220438121 CN201220438121U CN202886209U CN 202886209 U CN202886209 U CN 202886209U CN 201220438121 CN201220438121 CN 201220438121 CN 201220438121 U CN201220438121 U CN 201220438121U CN 202886209 U CN202886209 U CN 202886209U
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Abstract
The utility model discloses a stretching synchronization experimental apparatus which is used for solving the technical problem that the existing stretching experimental apparatus can not test the high-strain rate stretching performance of a material at high temperature. The technical scheme is as follows: the end of a stretching sample is designed into a convex-edge table form, the end of a pull rod connected with the stretching sample is designed into a wedge slot form, and then high-temperature synchronization is realized under the control of a linkage emission valve group through the cooperation of the two ends. By designing the connection mode between the stretching sample and the pull rod end, arranging a reserved gap and insulating heat between the stretching sample and the pull rod through an insulating material, the direct contact for heat transfer between the stretching sample and the pull rod is avoided when the sample is heated, so that an incident rod and a transmitting rod are always in a normal-temperature state in the experiment process, and the problem that local temperature of the incident rod and the transmitting rod rises at high temperature in the background art is overcome.
Description
Technical field
The utility model relates to a kind of experimental provision, particularly relates to a kind of high temperature high strain rate tensile synchronous experimental facility.
Background technology
With reference to Fig. 1, Fig. 2, document " S.Nemat-Nasser; J.B.Isaacs; and J.E.Starrett; Hopkinson Techniques for DynamicRecovery Experiments; Proc.R.Soc. (London) A[J]; 435 (1991) 371-391 " and " S.Nemat-Nasser, Recovery Hopkinson Bar Techniques, Mechanical Test and Evaluation, Vol.8ASM Handbook, American Society for Metals, 2000, P.1068-1073 " a kind of tensile test device of material being realized the high strain rate tensile performance test is disclosed.This device comprises that energy absorber 1, energy transmit bar 2, loading flange 3, impact tube 4, emission valve 5, impact air chamber 6, incident bar 7, tensile sample 8 and transmission bar 9.Wherein energy absorber 1, energy transmission bar 2, impact air chamber 6, incident bar 7 and transmission bar 9 all are placed on the platform.Emission valve 5 is connected by tracheae with impact air chamber 6; Energy transmission bar 2, incident bar 7, transmission bar 9 are cylindrical bar; Impact tube 4 is the tubulose quarter butt, is enclosed within on the incident bar 7, and can be free to slide along incident bar 7, and whole incident bar 7 runs through impact air chamber 6; Incident bar 7 is designed to load flange 3 with impact tube 4 colliding parts; Energy transmits bar 2 and all has aperture at axis part with loading flange 3, places one and be about the straight thin iron staff of 3cm in aperture, makes the two coaxial; Energy transmits bar 2, load flange 3, impact tube 4, incident bar 7 and transmission bar 9 is to process (as all being 18Ni or all being Ti) by same material.Tensile sample 8 two ends are threaded, and are threaded connection with incident bar 7 and transmission bar 9.Impact tube 4 is enclosed within on the incident bar 7, and can be free to slide along incident bar 7, and whole incident bar 7 runs through impact air chamber 6.
When carrying out stretching experiment, first tensile sample 8 and incident bar 7 and transmission bar 9 are threaded connection, impact tube 4 are pushed impact air chamber 6 again.Be added to predetermined pressure by impact air chamber 6, at this moment open emission valve 5, impact tube 4 can be pushed at a high speed load to flange 3, load flange 3 by bump and in incident bar 7, produce a tensile strain ripple, this ripple is delivered to tensile sample 8 by incident bar 7 and tensile sample 8 is loaded, calculate by the strain wave pulse to incident bar 7 and transmission bar 9, can obtain the dynamic stress strain curve of tensile sample 8.
The disclosed device of document can carry out the dynamic performance testing of material under the normal temperature (room temperature), but can not carry out the dynamic performance testing of material under the high temperature.Reason is: (1) is if directly increase temperature sample, since tensile sample 8 by screw thread directly and incident bar 7 and transmission bar 9 be connected, the local temperature of the incident bar 7 that is connected with sample and transmission bar 9 is raise, cause the hydraulic performance declines such as the elastic modulus of incident bar 7 and transmission bar 9 and intensity, and velocity of wave changes in the bar, can't accurately calculate tensile sample 8 dynamic stress strain curves by the strain wave pulse of incident bar 7 and transmission bar 9; (2) if select resistant to elevated temperatures incident bar 7 and transmission bar 9, because tensile sample 8 directly is connected with incident bar 7 and transmission bar 9 by screw thread, specimen temperature is very fast along the pole transmission, also very difficult sample is increased temperature; (3) no matter select incident bar 7 and the transmission bar 9 of which kind of metal, its elastic modulus can descend rapidly after temperature surpasses about 250 ° of C.
Summary of the invention
For overcome existing tensile test device can not test material the problem of high-strain-rate tensile property at high temperature, the utility model provides a kind of high temperature high strain rate tensile synchronous experimental facility.This device is designed to convex edge platform form with the termination of tensile sample, the termination of the pull bar that is connected with tensile sample is designed to the wedge-shaped slot form, realize that high temperature is synchronous under the control that is engaged in interlock emission valve group by both, can realize the high rate of strain performance test of material at high temperature.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of high temperature high strain rate tensile synchronous experimental facility, comprise energy absorber 1, energy transmission bar 2, load flange 3, impact tube 4, emission valve 5, impact air chamber 6, incident bar 7, tensile sample 8 and transmission bar 9, energy absorber 1, energy transmit bar 2, impact air chamber 6, incident bar 7 and transmission bar 9 and all are placed on the platform.Emission valve 5 is connected by tracheae with impact air chamber 6; Energy transmission bar 2, incident bar 7, transmission bar 9 are cylindrical bar; Impact tube 4 is the tubulose quarter butt, is enclosed within on the incident bar 7, and can be free to slide along incident bar 7, and whole incident bar 7 runs through impact air chamber 6; Incident bar 7 is designed to load flange 3 with impact tube 4 colliding parts; Energy transmits bar 2 and all designs an aperture at axis part with loading flange 3, places straight thin iron staff in aperture, makes the two coaxial.Be characterized in also comprising synchronous air chamber 10, piston 11, tracheae 12, high temperature furnace 13, draft cylinder 14, thermocouple wire 15, thermal insulation material 16.Emission valve 5 is comprised of emission valve, impact air chamber valve and draft cylinder valve, and air chamber 10 is connected by tracheae 12 through emission valve 5 with draft cylinder 14 synchronously, and the piston 11 in the draft cylinder 14 is threaded connection transmission bar 9.Incident bar 7 is connected the termination that connects tensile sample and is designed a wedge-shaped slot with transmission bar; Tensile sample 8 two ends are designed to convex edge platform shape, remove crescent along diametric(al); Effective gauge length section is cylindrical in the middle of the two convex edge you heads.Both sides, tensile sample termination and wedge-shaped slot inwall are thermal insulation materials 16, and thermocouple wire 15 is strapped in the gauge length section of tensile sample 8, effective bringing-up section of high temperature furnace 13 be fixed on tensile sample 8 gauge length sections around.
The beneficial effects of the utility model are: by design tensile sample and pull bar termination type of attachment, preset clearance is set, and by thermal insulation material that tensile sample and pull bar is heat insulation, so that when sample is heated, avoided the direct contact heat transfer of tensile sample and pull bar, thereby in experimentation, so that incident bar and transmission bar are in the normal temperature state all the time, overcome in the background technology problem that the local temperature of incident bar and transmission bar at high temperature can raise.
Below in conjunction with embodiment the utility model is elaborated.
Description of drawings
Fig. 1 is the schematic diagram of background technology tensile test device.
Fig. 2 is the partial enlarged drawing of A part among Fig. 1.
Fig. 3 is the schematic diagram of the utility model high temperature high strain rate tensile synchronous experimental facility.
Fig. 4 is the partial enlarged drawing of A part among Fig. 3.
Fig. 5 is the partial enlarged drawing of B part among Fig. 3.
Fig. 6 is the front view of tensile sample among Fig. 4.
Fig. 7 is the vertical view of tensile sample among Fig. 4.
Fig. 8 is the axonometric drawing of tensile sample among Fig. 4.
Among the figure, 1-energy absorber, 2-energy transmit bar, 3-loads flange, 4-impact tube, 5-emission valve, 6-impact air chamber, 7-incident bar, 8-tensile sample, 9-transmission bar, the synchronous air chamber of 10-, 11-piston, 12-tracheae, 13-high temperature furnace, 14-synchro-draw cylinder, 15-thermocouple wire, 16-thermal insulation material, 17-gauge length section.
Embodiment
With reference to Fig. 3～8, the utility model high temperature high strain rate tensile synchronous experimental facility comprises energy absorber 1, energy transmission bar 2, loads flange 3, impact tube 4, links and launch valve 5, impact air chamber 6, incident bar 7, tensile sample 8, transmission bar 9, synchronous air chamber 10, piston 11, tracheae 12, high temperature furnace 13, draft cylinder 14, thermocouple wire 15, thermal insulation material 16.Energy absorber 1, energy transmit bar 2, impact air chamber 6, incident bar 7 and transmission bar 9 and all are placed on the platform.Energy transmission bar 2, incident bar 7, transmission bar 9 are cylindrical bar; Impact tube 4 is the tubulose quarter butt, is enclosed within on the incident bar 7, and can be free to slide along incident bar 7, and whole incident bar 7 runs through impact air chamber 6; Incident bar 7 is designed to load flange 3 with impact tube 4 colliding parts; Energy transmits bar 2 and all has aperture at axis part with loading flange 3, places one and be about the straight thin iron staff of 3cm in aperture, makes the two coaxial; Energy transmits bar 2, load flange 3, impact tube 4, incident bar 7 and transmission bar 9 is to process (as all being 18Ni or all being Ti) by same material.Emission valve 5 impacts the air chamber valve by the emission valve, and three valves of draft cylinder valve form, and emission valve and impact air chamber 6 are connected by tracheae; Can realize impact air chamber 6 and synchronous air chamber 10 independent pressurising and synchronized transmissions; Synchronously air chamber 10 is connected ventilation with draft cylinder 14 by interlock emission valve 5 process tracheaes 12, spurs the piston rod in the draft cylinder 14, and then the transmission bar 9 that is connected with piston rod thread of pulling.Incident bar 7 is connected the termination that connects sample and is designed a wedge-shaped slot with transmission bar; Tensile sample 8 terminations are designed to convex edge platform shape, remove crescent along diametric(al); Effective gauge length section 17 is cylindrical in the middle of the two convex edge you heads.The physical dimension of convex edge platform is less than the physical dimension of wedge-shaped slot, thereby 2mm easily be put into and be left in the sample termination can to the gap of 3mm along wedge-shaped slot, makes its integral body just remain cylindrical; Add 2mm to the thermal insulation material 16 of 3mm in both sides, sample termination and wedge-shaped slot inwall, completely cut off on the one hand the transmission of heat by contact of the two, the sample termination is fixed in the wedge-shaped slot.
During work: at first impact tube 4 is pushed and impact air chamber 6, with tensile sample 8 two ends convex edge platform and incident bar 7 and the assembling of transmission bar 9 wedge-shaped slot rod ends.Separate in diametric(al) with the inwall of thermal insulation material 16 with tensile sample 8 two ends sidewalls and wedge-shaped slot rod end during assembling, make it can not transmission of heat by contact, tensile sample 8 two ends convex edge platform and wedge-shaped slot rod end stay approximately 3mm gap vertically, guarantee that tensile sample 8 does not directly contact with transmission bar 9 with incident bar 7, then thermocouple wire 15 is bound to tensile sample 8 gauge length sections 17, mobile high temperature furnace 13 makes the effective bringing-up section of stove at gauge length section 17 positions of tensile sample 8.At this moment, impact air chamber 6 is stamped into the pressure 0.2Mpa that experiment needs, synchronous air chamber 10 is pressurized to lucky gap-closing under the predefined pressure 0.06Mpa, when thermocouple wire 15 given temperature reach the temperature 1000K of experiment needs, open interlock emission valve 5 so that the high pressure gas of impacting in the air chamber 6 promotes impact tube 4 to loading flange 3 motions, the air pressure of air chamber 10 enters into draft cylinder 14 along tracheae 12 synchronously simultaneously, make fast pulling transmission bar 9 of piston 11, and then make tensile sample 8 two ends convex edge platform and incident bar 7 and transmission bar 9 rod end wedge-shaped slot close contacts, at this moment, load the stretching ripple and just in time arrive tensile sample 8, tensile sample 8 is loaded, by incident bar 7 and transmission bar 9 strain waves are calculated, can obtain the stress-strain diagram of tensile sample 8.This device has guaranteed incident bar 7 and transmission bar 9 at low temperatures, only tensile sample is applied high temperature, accurately and reliably material is carried out the high rate of strain coupling performance test of high temperature.
Claims (1)
1. high temperature high strain rate tensile synchronous experimental facility, comprise energy absorber (1), energy transmission bar (2), load flange (3), impact tube (4), emission valve (5), impact air chamber (6), incident bar (7), tensile sample (8) and transmission bar (9), energy absorber (1), energy transmit bar (2), impact air chamber (6), incident bar (7) and transmission bar (9) and all are placed on the platform; Emission valve (5) is connected by tracheae with impact air chamber (6); Energy transmission bar (2), incident bar (7), transmission bar (9) are cylindrical bar; Impact tube (4) is the tubulose quarter butt, is enclosed within on the incident bar (7), and can be free to slide along incident bar (7), and whole incident bar (7) runs through impact air chamber (6); Incident bar (7) is fixed with loading flange (3) with an end of impact tube (4) collision; Energy transmits bar (2) and all designs an aperture at axis part with loading flange (3), places straight thin iron staff in aperture, makes the two coaxial; It is characterized in that: also comprise synchronous air chamber (10), piston (11), tracheae (12), high temperature furnace (13), draft cylinder (14), thermocouple wire (15), thermal insulation material (16); Emission valve (5) is comprised of emission valve, impact air chamber valve and draft cylinder valve, air chamber (10) is connected by tracheae (12) through emission valve (5) with draft cylinder (14) synchronously, and the piston (11) in the draft cylinder (14) is threaded connection transmission bar (9); Incident bar (7) is connected 9 with transmission bar) termination that connects tensile sample designs a wedge-shaped slot; Tensile sample (8) two ends is designed to convex edge platform shape, removes crescent along diametric(al); Effective gauge length section (17) is cylindrical in the middle of the two convex edge you heads; Both sides, tensile sample termination and wedge-shaped slot inwall are thermal insulation material (16), and thermocouple wire (15) is strapped in the gauge length section (17) of tensile sample (8), effective bringing-up section of high temperature furnace (13) be fixed on tensile sample (8) gauge length section (17) around.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220438121 CN202886209U (en) | 2011-12-18 | 2012-08-30 | High-temperature high-strain rate stretching synchronization experimental apparatus |
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| CN201120558310.7 | 2011-12-18 | ||
| CN201120558310 | 2011-12-18 | ||
| CN 201220438121 CN202886209U (en) | 2011-12-18 | 2012-08-30 | High-temperature high-strain rate stretching synchronization experimental apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830019A (en) * | 2011-12-18 | 2012-12-19 | 西北工业大学 | Tensile synchronous experiment device |
| CN104089810A (en) * | 2014-07-08 | 2014-10-08 | 天津大学 | Device for testing thermal buckling of thin-wall pipeline under different embedding conditions |
| CN110470551A (en) * | 2019-09-04 | 2019-11-19 | 湖北文理学院 | A kind of SHPB experimental rig and its emitter and control method |
| CN113237775A (en) * | 2021-05-11 | 2021-08-10 | 中国科学技术大学 | Device for testing dynamic tensile mechanical properties of fiber monofilaments at high temperature |
-
2012
- 2012-08-30 CN CN 201220438121 patent/CN202886209U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830019A (en) * | 2011-12-18 | 2012-12-19 | 西北工业大学 | Tensile synchronous experiment device |
| CN104089810A (en) * | 2014-07-08 | 2014-10-08 | 天津大学 | Device for testing thermal buckling of thin-wall pipeline under different embedding conditions |
| CN110470551A (en) * | 2019-09-04 | 2019-11-19 | 湖北文理学院 | A kind of SHPB experimental rig and its emitter and control method |
| CN113237775A (en) * | 2021-05-11 | 2021-08-10 | 中国科学技术大学 | Device for testing dynamic tensile mechanical properties of fiber monofilaments at high temperature |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130417 Effective date of abandoning: 20141015 |
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| RGAV | Abandon patent right to avoid regrant |