CN104020061A - Dynamic effect device for gas-gun testing materials and testing method - Google Patents
Dynamic effect device for gas-gun testing materials and testing method Download PDFInfo
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- CN104020061A CN104020061A CN201410181126.3A CN201410181126A CN104020061A CN 104020061 A CN104020061 A CN 104020061A CN 201410181126 A CN201410181126 A CN 201410181126A CN 104020061 A CN104020061 A CN 104020061A
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Abstract
The invention relates to a dynamic effect device for gas-gun testing materials and a testing method. The dynamic effect device is characterized by comprising a cylindrical gun barrel and a cylindrical shell in a gun barrel body, wherein a high-pressure gas inlet is formed in one end of the gun barrel, and the opening of the other end of the gun barrel is provided with a material block to be tested; a sensor is arranged on the material block to be tested, and a rubber ring is arranged on the outer periphery of the cylindrical shell to seal the gun barrel. The dynamic effect device has the advantages of simple structure and reasonable design and can be used for easily testing the friction force effect and the inertia force effect of materials to be tested.
Description
Technical field:
The present invention relates to the device design of using one-level Gas Gun to impact material, comprise the design of bullet and combination of materials, belong to testing of materials field; Particularly Gas Gun test material dynamic effect device and method of testing.
Background technology:
In recent years, both at home and abroad one after another high-strength concrete and high strength steel fibre concrete are carried out the experimental study of anti-conventional weapon penetration and blast.Materials behavior equation mainly obtains by test, and the test of this respect is also not enough.Gas Gun is the impact loading device of current experiment use, Gas Gun can transmitted at high speed bullet and test material clash into load.The nineties, Grady etc. just start to utilize Gas Gun to obtain the Hugoniot data under impact compress, Yan Shaohua (the experimental study of high-strength concrete and high strength steel fibre concrete high pressure state equation, Polytechnics of PLA journal, 2000,49-53.) etc. 1 (6): carry out plate impact experiment, Jiao Chujie, the stone of washing, Jiang Guoping, the high happy a kind of Gas Gun test material device (a kind of gas-gun device (201010141475.4) of testing material dynamic property) that designed.But, after Gas Gun test requires to clash into conventionally, conventionally require shock wave to propagate under the state of one dimension, therefore dynamic effect (frictional effects, inertial force effect) in Gas Gun experiment, be difficult to realize, and be easy to just can obtain dynamic effect result (Jiang Guoping in the SHPB of relatively low impact velocity experiment
hao Hong?
zeng Chunhang?
hao Yifei?
wu Rujun?
liu Jichao. the frictional effects experimental study under percussive action, Acta Physica Sinica, 2013,62 (11): 116203-1-116203-5.), therefore, to carrying out high velocity impact experiment with Gas Gun, need to design the experiment of Gas Gun two dimension, need the bullet of impact and test block to design.
Summary of the invention:
The object of the present invention is to provide a kind of Gas Gun test material dynamic effect device and method of testing, this Gas Gun test material dynamic effect apparatus structure is simple, reasonable in design, is conducive to realize detected materials is carried out to the test of frictional effects and inertial force effect.
The device of Gas Gun test material dynamic effect of the present invention, it is characterized in that: comprise cylindricality gun tube and be located at the cylindricality shell in gun tube body, gun tube one end has high pressure admission mouth, the other end mouth of pipe is provided with detected materials piece, described detected materials piece is provided with sensor, and described cylindricality shell periphery is provided with rubber ring with sealing gun tube.
Above-mentioned cylindricality shell includes cylindrical lightweight body and is located at the film flying on the cascaded surface of cylindrical lightweight body top, and described film flying is cylindrical, and its upper surface is provided with higher than the arc of cylindrical lightweight body upper surface and protrudes.
Above-mentioned cylindricality shell outer peripheral face is provided with twice annular groove, in described annular groove, is arranged with rubber ring.
Above-mentioned detected materials piece is made up of two above stacked concrete blocks, and detected materials piece is fixed on by epoxy resin on the target plate that is positioned at cylindricality gun tube port, and described sensor includes copper-manganese sensor or Opinions-Pictures copper sensor.
The material of above-mentioned cylindrical lightweight body is polytetrafluoroethylmaterial material, and film flying is aluminium.
The principle of work of Gas Gun test material dynamic effect device of the present invention: the sealing of cylindricality shell is located in cylindricality gun tube, under the effect of gun tube one end high pressure admission mouth high pressure gas, make cylindricality shell termination hit detected materials piece, the sensor being located on detected materials piece records pressure signal or stretch signal etc.
The method that Gas Gun test material dynamic effect device of the present invention is tested, it is characterized in that: the device of described Gas Gun test material dynamic effect comprises cylindricality gun tube and is located at the cylindricality shell in gun tube body, gun tube one end has high pressure admission mouth, the other end mouth of pipe is provided with detected materials piece, described detected materials piece is provided with sensor, described cylindricality shell periphery is provided with rubber ring with sealing gun tube, the mechanism producing according to dynamic effect, frictional effects experiment can adopt diameter identical, the different detected materials piece of thickness is tested, inertial force effect can adopt the detected materials piece that length-diameter ratio is consistent to test, meanwhile, dynamic effect is transversal effect normally, needs test pressure and stretch signal while testing same Lagrangian position, conventionally uses copper-manganese sensors measure pressure signal ， Yong Opinions-Pictures copper sensor measurement stretch signal in high velocity impact.
Advantage of the present invention: result is simple, reasonable in design, is conducive to realize easily the test of detected materials being carried out to frictional effects and inertial force effect.
Brief description of the drawings:
Fig. 1 is the organigram of cylindricality shell of the present invention;
Fig. 2 is that the present invention uses state organigram;
Fig. 3 is the typical pressure timeamplitude map of two dimension experiment;
Fig. 4 is gas two dimension experiment frictional effects experimental result picture;
Fig. 5 gas two dimension experiment inertial force effect experiment result figure.
Embodiment:
The device of Gas Gun test material dynamic effect of the present invention, comprise cylindricality gun tube 1 and be located at the cylindricality shell 2 in gun tube body, gun tube 1 one end has high pressure admission mouth 3, the other end mouth of pipe is provided with detected materials piece 4, described detected materials piece is provided with sensor 5, and described cylindricality shell periphery is provided with rubber ring 6 with sealing gun tube.This sensor can be copper-manganese sensor Huo Opinions-Pictures copper sensor.
For reasonable in design, above-mentioned cylindricality shell includes cylindrical lightweight body and is located at the film flying 8 on the cascaded surface of cylindrical lightweight body top, and described film flying is cylindrical, and its upper surface is provided with higher than the arc of cylindrical lightweight body upper surface and protrudes 9.
In order to play good sealing, above-mentioned cylindricality shell outer peripheral face is provided with twice annular groove 10, is arranged with rubber ring 6 in described annular groove.
In order to realize good test, above-mentioned detected materials piece is made up of two above stacked concrete blocks, detected materials piece is fixed on by epoxy resin 12 on the target plate 13 that is positioned at cylindricality gun tube port, and described sensor includes copper-manganese sensor Huo Opinions-Pictures copper sensor.
In order to make cylindrical lightweight body lighter, the material of above-mentioned cylindrical lightweight body is polytetrafluoroethylmaterial material, and film flying is aluminium.
The principle of work of Gas Gun test material dynamic effect device of the present invention: the sealing of cylindricality shell is located in cylindricality gun tube, under the effect of gun tube one end high pressure admission mouth high pressure gas, make cylindricality shell termination hit detected materials piece, the sensor being located on detected materials piece records pressure signal or stretch signal etc.
The method that Gas Gun test material dynamic effect device of the present invention is tested, it is characterized in that: the device of described Gas Gun test material dynamic effect comprises cylindricality gun tube and is located at the cylindricality shell in gun tube body, gun tube one end has high pressure admission mouth, the other end mouth of pipe is provided with detected materials piece, described detected materials piece is provided with sensor, described cylindricality shell periphery is provided with rubber ring with sealing gun tube, the mechanism producing according to dynamic effect, frictional effects experiment can adopt diameter identical, the different detected materials piece of thickness is tested, inertial force effect can adopt the detected materials piece that length-diameter ratio is consistent to test, meanwhile, dynamic effect is transversal effect normally, needs test pressure and stretch signal while testing same Lagrangian position, conventionally uses copper-manganese sensors measure pressure signal ， Yong Opinions-Pictures copper sensor measurement stretch signal in high velocity impact.
Advantage of the present invention: result is simple, reasonable in design, is conducive to realize easily the test of detected materials being carried out to frictional effects and inertial force effect.
The mechanism producing according to dynamic effect, frictional effects experiment can adopt diameter identical, and the different detected materials piece of thickness is tested, and inertial force effect can adopt the detected materials piece that length-diameter ratio is consistent to test.Meanwhile, dynamic effect is transversal effect normally, and this needs test pressure and stretch signal while just requiring us to test same Lagrangian position, in high velocity impact, conventionally with copper-manganese sensors measure pressure signal, uses Opinions-Pictures copper sensor measurement stretch signal.
The combination of cylindricality body and film flying by Gas Gun drive with detected materials piece collision after, shock wave is propagated in measured material, by the pressure pulse take-off time of read sensor, (speed=displacement/time) obtains impacting wave propagation velocity.
Bullet accelerates by gas-powered at gun tube, and detected materials piece is connected with target plate by epoxy resin, through accelerating after a while, and bullet and the collision of detected materials piece.
Test philosophy and test
In Gas Gun experiment velocity of wave can be propagated by ripple in the take-off position (Laplace coordinate) of copper-manganese sensor try to achieve with the time:
In formula, D is shock velocity, S is distance, t is that sensor take-off time is poor, experiment test pressure (copper-manganese) and the stretching (Opinions-Pictures copper of three Lagrangian positions) signal, obtain real pressure time-history curves, according to copper-manganese Yu the amplification coefficient of Opinions-Pictures copper, the signal (normalization method processing) that test signal is deducted to stretching, obtains typical pressure signal figure after treatment as Fig. 3, in figure, Article 1, curve is initial curve, shock wave is not propagated in concrete, therefore, and D
1, D
2respectively corresponding the second, Article 3 curve.
The processing of two dimension rate of strain
According to law of conservation of mass, under the stable condition of propagating of shock wave, the quality flowing into from shock wave right side in the unit interval should equal the quality flowing out from left side, obtains thus:
ρ
0(D-u
0)＝ρ
1(D-u
1)
According to the law of conservation of momentum, shock wave is in the process of propagating, and the momentum that acts on medium in the unit interval should equal the change of its momentum, obtains thus:
p
1-p
0＝ρ
0(PD-u
0)(u
1-u
0)
Use respectively p
0ρ
0c
0and u
0represent; Medium parameter after shock wave: pressure, density, interior energy, the velocity of sound and particle velocity, use respectively p
1, ρ
1, c
1and u
1represent.
Owing to can obtaining pressure and shock velocity by above two formulas, the relation between strain:
p＝ρDu
And
M＝Dε
In formula, ε represents strain, by above two formulas, can be in the hope of strain time-history curves according to pressure time-history curves, and then can solve mean strain rate.
According to frictional effects produce principle, experimental design φ 55*28, the test specimen of φ 42*21mm impacts, it is 300 meter per seconds that each test specimen adopts respectively impact velocity, 250 meter per seconds, 200 meter per seconds impact.
According to inertial force effect produce principle, experimental design φ 55*40, φ 55*30, the test specimen of φ 55*20mm impacts, it is 300 meter per seconds that each test specimen adopts respectively impact velocity, 250 meter per seconds, 200 meter per seconds impact.
Through normalization method processing, rate of strain processing, obtains Gas Gun two dimension frictional effects experimental result (Fig. 4, Fig. 5).
Known according to experimental result, for frictional effects, under same strain rate, the surge pressure of thickness large (friction force impact is less) is less, this result that frictional effects produces just.
For inertial force effect, under same strain rate, the concrete surge pressure that diameter is larger is larger, this result that inertial force effect produces just.
Experimental result shows, this inventive principle is feasible with design.
Claims (6)
1. the device of a Gas Gun test material dynamic effect, it is characterized in that: comprise cylindricality gun tube and be located at the cylindricality shell in gun tube body, gun tube one end has high pressure admission mouth, the other end mouth of pipe is provided with detected materials piece, described detected materials piece is provided with sensor, and described cylindricality shell periphery is provided with rubber ring with sealing gun tube.
2. the device of Gas Gun test material dynamic effect according to claim 1, it is characterized in that: described cylindricality shell includes cylindrical lightweight body and is located at the film flying on the cascaded surface of cylindrical lightweight body top, described film flying is cylindrical, and its upper surface is provided with higher than the arc of cylindrical lightweight body upper surface and protrudes.
3. the device of Gas Gun test material dynamic effect according to claim 1, is characterized in that: described cylindricality shell outer peripheral face is provided with twice annular groove, in described annular groove, is arranged with rubber ring.
4. the device of Gas Gun test material dynamic effect according to claim 1, it is characterized in that: described detected materials piece is made up of two above stacked concrete blocks, detected materials piece is fixed on by epoxy resin on the target plate that is positioned at cylindricality gun tube port, and described sensor includes copper-manganese sensor or Opinions-Pictures copper sensor.
5. the device of Gas Gun test material dynamic effect according to claim 1, is characterized in that: the material of described cylindrical lightweight body is polytetrafluoroethylmaterial material, and film flying is aluminium.
6. a right to use requires the method that described in 1, Gas Gun test material dynamic effect device is tested, it is characterized in that: the device of described Gas Gun test material dynamic effect comprises cylindricality gun tube and is located at the cylindricality shell in gun tube body, gun tube one end has high pressure admission mouth, the other end mouth of pipe is provided with detected materials piece, described detected materials piece is provided with sensor, described cylindricality shell periphery is provided with rubber ring with sealing gun tube, the mechanism producing according to dynamic effect, frictional effects experiment can adopt diameter identical, the different detected materials piece of thickness is tested, inertial force effect can adopt the detected materials piece that length-diameter ratio is consistent to test, meanwhile, dynamic effect is transversal effect normally, needs test pressure and stretch signal while testing same Lagrangian position, conventionally uses copper-manganese sensors measure pressure signal ， Yong Opinions-Pictures copper sensor measurement stretch signal in high velocity impact.
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| CN104596840A (en) * | 2015-01-14 | 2015-05-06 | 中国科学院力学研究所 | Integrated combined flying plate and manufacturing method thereof |
| CN105784512A (en) * | 2016-04-26 | 2016-07-20 | 中国工程物理研究院流体物理研究所 | Experiment method taking dynamic tensile stress amplitude value as variable and impact experiment device |
| CN105954120A (en) * | 2016-04-26 | 2016-09-21 | 中国工程物理研究院流体物理研究所 | Dynamic damage experimental method based on dynamic tensile strain rate serving as single variable |
| CN105954121A (en) * | 2016-04-26 | 2016-09-21 | 中国工程物理研究院流体物理研究所 | Experimental method based on tensile stress lasting time serving as variable, and impact experiment device |
| CN113848132A (en) * | 2021-09-23 | 2021-12-28 | 中国工程物理研究院流体物理研究所 | Long pulse width multi-pulse loading test device based on gunpowder driving |
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| CN105784512A (en) * | 2016-04-26 | 2016-07-20 | 中国工程物理研究院流体物理研究所 | Experiment method taking dynamic tensile stress amplitude value as variable and impact experiment device |
| CN105954120A (en) * | 2016-04-26 | 2016-09-21 | 中国工程物理研究院流体物理研究所 | Dynamic damage experimental method based on dynamic tensile strain rate serving as single variable |
| CN105954121A (en) * | 2016-04-26 | 2016-09-21 | 中国工程物理研究院流体物理研究所 | Experimental method based on tensile stress lasting time serving as variable, and impact experiment device |
| CN105954120B (en) * | 2016-04-26 | 2018-08-21 | 中国工程物理研究院流体物理研究所 | Using dynamic tensile strain rate as the dynamic damage experimental method of unitary variant |
| CN105954121B (en) * | 2016-04-26 | 2018-08-21 | 中国工程物理研究院流体物理研究所 | Applied to using the tensile stress duration as the impact experiment apparatus of the experimental method of variable |
| CN105784512B (en) * | 2016-04-26 | 2018-08-24 | 中国工程物理研究院流体物理研究所 | Using dynamic tensile stress amplitude as the experimental method of variable and impact experiment apparatus |
| CN113848132A (en) * | 2021-09-23 | 2021-12-28 | 中国工程物理研究院流体物理研究所 | Long pulse width multi-pulse loading test device based on gunpowder driving |
| CN113848132B (en) * | 2021-09-23 | 2023-07-04 | 中国工程物理研究院流体物理研究所 | Long pulse width multi-pulse loading test device based on gunpowder driving |
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