CN203037808U - Artificial lightning stroke damage testing arrangement of carbon-fiber composite - Google Patents
Artificial lightning stroke damage testing arrangement of carbon-fiber composite Download PDFInfo
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- CN203037808U CN203037808U CN 201320021744 CN201320021744U CN203037808U CN 203037808 U CN203037808 U CN 203037808U CN 201320021744 CN201320021744 CN 201320021744 CN 201320021744 U CN201320021744 U CN 201320021744U CN 203037808 U CN203037808 U CN 203037808U
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Abstract
The utility model discloses an artificial lightning stroke damage testing arrangement of a carbon-fiber composite comprising an insulation support and a lightning arrester. An upper part of the insulation support is provided with an upper insulation protective plate, and a lower part is provided with a lower insulation protective plate. The lower insulation protective plate is provided with a deflector and a through hole, and the deflector is grounded. One end of the lightning arrester passes through the upper insulation protective plate, and is extended into the upper part of the deflector. The testing device has advantage of reliable structure, safe and convenient operation, and abilities of evaluating lightning stroke damage impedance and damage tolerance of the carbon-fiber composite accurately, improving performance of carbon-fiber composite, and promoting application of carbon-fiber composite in aerospace equipment.
Description
Technical field
The utility model relates to a kind of testing of materials field experimental provision, relates in particular to the artificial thunderbolt damage proving installation of carbon fiber enhancement resin base composite material.
Background technology
Along with the continuous development of aero-manufacturing technology, military aircraft still is that civil aircraft has all used compound substance in large quantities, high-performance carbon fibre compound substance especially, and the compound substance consumption is especially up to 50% in " Dreamliner " Boeing 787.Compare with traditional metal materials, character such as compound substance has specific strength and specific modulus height, density is low, designability is strong, fatigue resistence and good corrosion resistance is applied in the aerospace industry more and more.
Thunder and lightning is a kind of spontaneous phenomenon that has destructive power.In general, average per 3000 pilot time of 1 airplane just have thunderstruck chance 1 time, especially in many thunderstorms area.The report that aircraft is struck by lightning is of common occurrence.Lightning protection is one of the key factor that must consider in aircraft research and development and the production.
In order to improve the combination property of aircraft, reduce aircraft weight, modern airliner has used advanced composite material more and more.A large amount of uses of composite element have improved the combination property of aircraft significantly, but the electric conductivity of compound substance and thermal conductivity are than metal material difference, and present anisotropic characteristics, the electric current that discharges in the lightning stroke process can not in time be eliminated by discharge brush, the electric charge that is trapped on the composite element might be broken through clearance for insulation, rush at conductor, produce spark, even contact fuel tank and combustion explosion, the possibility that causes the accident after making the aircraft experience be struck by lightning increases, so the lightning Protection problem of composite element has caused people's special concern.In order to improve aircraft safety, the artificial thunderbolt damage test of compound substance becomes important topic.All must be through lightning test before any advanced composite material (ACM) is used aboard, there are complicated thunderbolt simulation and testing apparatus in aircraft manufacturing commercial cities such as Boeing, Air Passenger.Under the overall background of " large aircraft " national great special project and material technology " compoundization of structure function " development trend, to manually be struck by lightning damage test of carbon fibre composite, help to improve its electrical and thermal conductivity performance, guarantee the security that it is used aboard.
Thunder and lightning is the phenomenon that sparks, voltage high (hundreds of thousands volt), electric current is (training of several Wan An) greatly, destruction is strong, laboratory and planemaker come the lightning stroke process of artificial simulating nature circle by high voltage or high electric current generation equipment, be used for the anti-thunderbolt ability of test compound material, improve material property with this.Manual simulation's material suffers lightning stroke process to need two parts experimental provision: artificial thunder and lightning generation equipment (for example, impulse voltage generator SJTU-3000kV) and sample testing device.Impulse voltage generator and impulse current generator can produce manual simulation's thunder and lightning of standards such as meeting IEC60060-1, IEC61000-4-5, DL/T848.5-2004, GB/T311, GB/T16927.1-1997, are used for material and device lightning test.Artificial thunder and lightning can produce high voltage or high electric current, and the danger of experiment is high, singularity is strong, the proving installation that can not use traditional fixing and supporting mechanism, conducting channel, insulating protection mechanism, test instrumentation etc. to form.In order fully to guarantee safety, design a kind of reliably, the artificial thunderbolt damage proving installation of carbon fibre composite seems very necessary easily.
The utility model content
The utility model provides a kind of artificial thunderbolt damage proving installation of carbon fibre composite for solving the problems of the technologies described above.
To achieve these goals, the utility model adopts following technical scheme:
The artificial thunderbolt damage proving installation of carbon fibre composite of the present utility model, comprise insulating support and attracting thunder needle, be provided with the insulating protection plate at the top of insulating support, the bottom is provided with down the insulating protection plate, upper surface at following insulating protection plate is provided with fair water fin, described fair water fin ground connection, one end of described attracting thunder needle passes the insulating protection plate, extend into the top of fair water fin, the other end of described attracting thunder needle links to each other with artificial thunder and lightning generation equipment, and the circuit that connects is provided with current measuring instrument, described fair water fin links to each other with artificial thunder and lightning generation equipment, and the circuit that connects is provided with pressure measuring instrument.
Described insulating support is provided with visual windows, and the position corresponding with visual windows is provided with ccd video camera, and described ccd video camera is located at the outside of insulating support.
The part that described attracting thunder needle passes the insulating protection plate is with sebific duct.
Described center of going up insulating protection plate, following insulating protection plate is processed with through hole.
Described fair water fin and attracting thunder needle all adopt conduction and the good pure copper material of thermal conductivity.
What described sebific duct adopted is polyurethane elastomer.
Described insulating protection plate, following insulating protection plate, the insulating support gone up all adopts high strength epoxy resin or phenolic resin material.
Utilize described device manually to be struck by lightning and damage the method for test, comprise the steps:
(1) prepares test unit
(1-1) will descend the insulating protection plate to be placed on the experiment table, place fair water fin and insulating support at following insulating protection plate successively;
(1-2) compound substance sample to be measured is placed on the upper surface center of fair water fin, fixing then, and place distance block at compound substance sample center according to design pitch;
(1-3) sebific duct is inserted in the central through hole of going up the insulating protection plate, make both closely contact and secure fixation;
(1-4) will go up the insulating protection plate and be placed on the insulating support, in the adjusting position of insulating protection plate make sebific duct be positioned at distance block directly over;
(1-5) insert attracting thunder needle from top to bottom in sebific duct, contact with the upper surface of distance block up to the tip of attracting thunder needle, fixedly attracting thunder needle prevents from gliding or deflection;
(1-6) lead/ground wire between connection fair water fin, attracting thunder needle, current measuring instrument, pressure measuring instrument and the artificial thunder and lightning generation equipment places ccd video camera;
(1-7) take out distance block, open ccd video camera, carry out lightning test;
(2) measure test figure, calculate the lightning discharge energy
(2-1) total voltage of measuring in the lightning stroke process with pressure measuring instrument changes, and the total current of measuring in the lightning stroke process with current measuring instrument changes;
(2-2) gross energy in the lightning stroke process obtains with the data computation of pressure measuring instrument, current measuring instrument, E=∫ uidt, and u represents the transient voltage in a certain moment in the formula, and i represents the transient current in a certain moment, and t represents the lightning discharge time.
The beneficial effects of the utility model are:
Parts assembly and disassembly in this device are convenient, are easy to change each parts, accurately regulate distance between attracting thunder needle and the sample, can also change test sample efficiently, easily, and test various physical dimensions, different types of compound substance.Last insulating protection plate, down insulating protection plate, insulating support all adopt high strength epoxy resin or the phenolic resin material of good insulating, and inside contains the glass fabric of good insulating, and is high temperature resistant, high pressure resistant, long service life, dimensionally stable.The center of upper and lower insulating protection plate all is processed with through hole, is processed with visual windows on the insulating support, is convenient to ccd video camera and records thunder-strike phenomenon.Fair water fin and attracting thunder needle all adopt conduction and the good pure copper material of thermal conductivity, and surfacing is handled.Copper coin is used for placing compound substance sample and reliable ground; Attracting thunder needle is for generation of thunderbolt electric arc.
The attracting thunder needle secure fixation is adopted high performance polyurethane elastomer in the sebific duct of last insulating protection plate, and it can closely contact with attracting thunder needle, relies on stiction to prevent the slippage dislocation of attracting thunder needle.Simultaneously, cooperate distance block, can make things convenient for, accurately regulate and control the distance between attracting thunder needle and the compound substance sample, be used for studying the influence that the discharge tip of attracting thunder needle and the distance of the normal direction between the compound substance sample are damaged electric arc and compound substance thunderbolt.Distance block is the rectangular parallelepiped with the stainless steel material grinding, and the height difference of these distance blocks is used for accurately regulating the discharge tip of attracting thunder needle and the distance between the compound substance sample.
In order to calculate the energy conversion relation of lightning stroke process, the voltage and current measurement instrument is connected with high-voltage generator or high current feedback circuit, and connects computing machine, records electric current and voltage size and the waveform of discharge process automatically.Gap discharge, smoldering of compound substance sample when ccd video camera is used for record thunderbolt are automatically caught fire and various dynamic deformation phenomenon.
By this device, can study the artificial thunderbolt damage process of compound substance, thus the anti-thunderbolt performance of optimal design compound substance.This proving installation reliable in structure, easy-to-operate, the thunderbolt that can accurately assess carbon fibre composite damages impedance and damage tolerance, promotes the further investigation of carbon fibre composite, improves the performance of carbon fibre composite.
The aspect of research is as follows:
1. Material Physics parameter (anisotropic conductivity, thermal conductivity, specific heat capacity), sample geometric parameter (length, width, highly), the influence of all multifactor artificial thunderbolt damages to carbon fibre composite such as material preparation process parameter (a shop layer angle, shop layer thickness, fiber volume fraction);
2. destruction pattern (degree of depth, area, position, shape etc.) and the micromechanism of damage of artificial thunderbolt damage takes place in the compound substance sample;
3. the distance between the discharge tip of attracting thunder needle and the compound substance sample is to the influence of electric arc and compound substance thunderbolt damage;
4. energy, voltage and current size and the voltage current waveform of manual simulation's thunderbolt are to the influence of the artificial thunderbolt damage of carbon fibre composite.
Based on experimental study, analyze the lightning stroke process various factors, inquire into thunderbolt to the failure mechanism of compound substance, set up the mathematical model of the artificial thunderbolt damage of carbon fibre composite, the anti-thunderbolt performance of optimal design compound substance, for the application of carbon fibre composite on Aero-Space provides experimental data and theoretical foundation, thereby promote compound substance in application and the popularization in fields such as China's Aero-Space, automobile, building, wind-powered electricity generation.
Description of drawings
Fig. 1 is the structural representation of the artificial thunderbolt damage proving installation of carbon fibre composite of the present utility model.
Among the figure, 1, attracting thunder needle; 2, sebific duct; 3, go up the insulating protection plate; 4, insulating support; 5, compound substance sample; 6, fair water fin; 7, following insulating protection plate; 8, current measuring instrument; 9, pressure measuring instrument; 10, artificial thunder and lightning generation equipment; 11, through hole; 12, ccd video camera; 13, distance block.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated:
The artificial thunderbolt damage proving installation of carbon fibre composite of the present utility model, comprise attracting thunder needle 1 and insulating support 4, on insulating support 4, be provided with insulating protection plate 3, below be provided with down insulating protection plate 7, be provided with fair water fin 6 at following insulating protection plate 7, be provided with through hole 11 at described insulating protection plate 7 down, fair water fin 6 ground connection, an end of attracting thunder needle 1 passes insulating protection plate 3, extend into the top of fair water fin 6.The other end of attracting thunder needle 1 links to each other with artificial thunder and lightning generation equipment 10, and the circuit that connects is provided with current measuring instrument 8.Described fair water fin 6 connects sample to be tested and ground wire, and the circuit that connects is provided with pressure measuring instrument 9.Insulating support 4 is provided with visual windows, and the position corresponding with visual windows is provided with ccd video camera 12, and described ccd video camera 12 is located at the outside of insulating support 4.The part that attracting thunder needle 1 passes insulating protection plate 3 is with sebific duct 2.The center of last insulating protection plate 3 and following insulating protection plate 7 all is processed with through hole.Fair water fin 6 and attracting thunder needle 1 all adopt conduction and the good pure copper material of thermal conductivity.What sebific duct 2 adopted is polyurethane elastomer.Last insulating protection plate 3, following insulating protection plate 7, insulating support 4 all adopt high strength epoxy resin or phenolic resin material, and distance block 13 is stainless steel material.
What artificial thunder and lightning generation equipment 10 adopted is: impulse voltage generator SJTU-3000kV.
This device is used for the artificial thunderbolt damage test of compound substance, comprises the steps:
(1) prepares test unit
(1-1) will descend insulating protection plate 7 to be placed on the experiment table, place fair water fin 6 and insulating support 4 successively.
(1-2) compound substance sample 5 to be measured is placed on the upper surface center of fair water fin 6, fixing then, and place distance block 13 at compound substance sample 5 centers according to design pitch.
(1-3) sebific duct 2 is inserted in the central through hole of going up insulating protection plate 3, make both closely contact and secure fixation.
(1-4) will go up insulating protection plate 3 and be placed on the insulating support 4, in the adjusting position of insulating protection plate 3 make sebific duct 2 be positioned at distance block 13 directly over.
(1-5) insert attracting thunder needle 1 from top to bottom in sebific duct 2, contact with the upper surface of distance block 13 up to the tip of attracting thunder needle 1, fixedly attracting thunder needle 1, prevents from gliding or deflection.
(1-6) according to circuit shown in Figure 1, connect the lead/ground wire between fair water fin 6, attracting thunder needle 1, current measuring instrument 8, pressure measuring instrument 9 and the artificial thunder and lightning generation equipment 10, place ccd video camera 12.
(1-7) take out distance block 13, open ccd video camera 12, carry out lightning test.
(2) measure test figure, calculate the lightning discharge energy
(2-1) total voltage of measuring in the lightning stroke process with pressure measuring instrument 9 changes, and the total current of measuring in the lightning stroke process with current measuring instrument 8 changes.
(2-2) gross energy in the lightning stroke process obtains with the data computation of pressure measuring instrument 9, current measuring instrument 8, E=∫ uidt, and u represents the transient voltage in a certain moment in the formula, and i represents the transient current in a certain moment, and t represents the lightning discharge time.
Claims (6)
1. the artificial thunderbolt of a carbon fibre composite damages proving installation, it is characterized in that: comprise insulating support and attracting thunder needle, be provided with the insulating protection plate at the top of insulating support, the bottom is provided with down the insulating protection plate, upper surface at following insulating protection plate is provided with fair water fin, described fair water fin ground connection, one end of described attracting thunder needle passes the insulating protection plate, extend into the top of fair water fin, the other end of described attracting thunder needle links to each other with artificial thunder and lightning generation equipment, and the circuit that connects is provided with current measuring instrument, described fair water fin links to each other with artificial thunder and lightning generation equipment, and the circuit that connects is provided with pressure measuring instrument.
2. artificial thunderbolt as claimed in claim 1 damages proving installation, and it is characterized in that: described insulating support is provided with visual windows, and the position of visual windows correspondence is provided with ccd video camera, and described ccd video camera is located at the outside of insulating support.
3. artificial thunderbolt as claimed in claim 1 damages proving installation, and it is characterized in that: the part that described attracting thunder needle passes the insulating protection plate is with sebific duct.
4. artificial thunderbolt as claimed in claim 3 damages proving installation, and it is characterized in that: what described sebific duct adopted is polyurethane elastomer.
5. artificial thunderbolt as claimed in claim 1 damages proving installation, it is characterized in that: described center of going up the insulating protection plate is processed with through hole.
6. artificial thunderbolt as claimed in claim 1 damages proving installation, and it is characterized in that: described fair water fin and attracting thunder needle all adopt conduction and the good pure copper material of thermal conductivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320021744 CN203037808U (en) | 2013-01-16 | 2013-01-16 | Artificial lightning stroke damage testing arrangement of carbon-fiber composite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320021744 CN203037808U (en) | 2013-01-16 | 2013-01-16 | Artificial lightning stroke damage testing arrangement of carbon-fiber composite |
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| CN203037808U true CN203037808U (en) | 2013-07-03 |
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| CN 201320021744 Expired - Fee Related CN203037808U (en) | 2013-01-16 | 2013-01-16 | Artificial lightning stroke damage testing arrangement of carbon-fiber composite |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018645A (en) * | 2013-01-16 | 2013-04-03 | 山东大学 | Device and method for testing artificial lightning injuries of carbon fiber composite material |
| CN103529367A (en) * | 2013-10-17 | 2014-01-22 | 上海斐讯数据通信技术有限公司 | DSL (Digital Subscriber Line) Modem lightning stroke prevention testing method |
| CN107340303A (en) * | 2016-05-02 | 2017-11-10 | 波音公司 | The thermocolour visible features of thunderbolt instruction in both metal structure and composite construction |
| CN109159917A (en) * | 2018-08-22 | 2019-01-08 | 合肥航太电物理技术有限公司 | A kind of aircraft thunder and lightning partition experiment device of electric field fidelity |
| US20210215629A1 (en) * | 2018-12-06 | 2021-07-15 | X1' An Jiaotong University | Lightning damage assessment method for carbon fiber reinforced polymer material considering non-linear impedance characteristic |
-
2013
- 2013-01-16 CN CN 201320021744 patent/CN203037808U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103018645A (en) * | 2013-01-16 | 2013-04-03 | 山东大学 | Device and method for testing artificial lightning injuries of carbon fiber composite material |
| CN103529367A (en) * | 2013-10-17 | 2014-01-22 | 上海斐讯数据通信技术有限公司 | DSL (Digital Subscriber Line) Modem lightning stroke prevention testing method |
| CN103529367B (en) * | 2013-10-17 | 2016-04-20 | 上海斐讯数据通信技术有限公司 | A kind of DSL Modem anti-lightning method of testing |
| CN107340303A (en) * | 2016-05-02 | 2017-11-10 | 波音公司 | The thermocolour visible features of thunderbolt instruction in both metal structure and composite construction |
| CN109159917A (en) * | 2018-08-22 | 2019-01-08 | 合肥航太电物理技术有限公司 | A kind of aircraft thunder and lightning partition experiment device of electric field fidelity |
| US20210215629A1 (en) * | 2018-12-06 | 2021-07-15 | X1' An Jiaotong University | Lightning damage assessment method for carbon fiber reinforced polymer material considering non-linear impedance characteristic |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20160116 |
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| EXPY | Termination of patent right or utility model |