Visualization of High-Speed Impact of Penetrator into Icy Target

Suzuki, Kojiro; Namba, Kazuya; Watanabe, Yasumasa

doi:10.4236/jfcmv.2016.42006

Cited by 9 publications

(6 citation statements)

References 8 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The uncertainty in the estimated velocity was mainly caused by the blur of the projectile image in the exposure time [9], and it was less than 5%.…”

Section: Uncertainty and Repeatability Of Experimental Resultsmentioning

confidence: 98%

“…Such launch method without the sabot enables us to avoid significant disturbance added to the trajectory and attitude of the projectile at the sabot separation [9]. To obtain a high velocity from the ballistic range, the projectile mass was reduced by the hollow structure with the thickness 2 mm.…”

Section: Particles and Projectilesmentioning

confidence: 99%

“…The ballistic range in the authors' laboratory [9] shown in Figure 2 was used for the present experiments. It can launch a projectile with the mass about 5 g at a speed up to about 500 m/s, depending on the charged pressure in the high-pressure chamber (breech) at 0.4 MPa to 0.8 MPa [7].…”

Section: Ballistic Range and Particle Sheet Generatormentioning

confidence: 99%

See 2 more Smart Citations

Visualization of High-Speed Impact of Projectile in Granular Sheet with Destructive Collision of Particles

Masaki¹,

Suzuki²,

Watanabe³

2018

JFCMV

Self Cite

View full text Add to dashboard Cite

The impact and penetration of a projectile in a particle-laden space, which are expected to have frequently occurred during the formation of the solar system and will occur in the case of an impact probe for future planetary exploration, were experimentally simulated by using the ballistic range. A two-dimensional sheet made from small glass beads or emery powder was formed by the free-falling device through a long slit in the test chamber evacuated down to about 35 Pa. A polycarbonate projectile of a hemisphere-cylinder or sphere shape with the mass and diameter about 4 g and 25 mm, respectively, was launched at the velocity up to 430 m/s, and the phenomena were observed by the high-speed camera at 20,000 fps. From a series of images, the bow-shock-wave-like laterally facing U-shaped pattern over the projectile and the absence of particles in the trail behind it were clearly seen. At the impact of the particles on the projectile surface, fine grains were formed due to the destructive collision and injected outward from the projectile. The images obtained by different lighting methods including the laser light sheet were compared. The effects of the particle diameter, its material and the impact velocity were also investigated.

show abstract

“…The uncertainty in the estimated velocity was mainly caused by the blur of the projectile image in the exposure time [9], and it was less than 5%.…”

Section: Uncertainty and Repeatability Of Experimental Resultsmentioning

confidence: 98%

Section: Particles and Projectilesmentioning

confidence: 99%

See 1 more Smart Citation

Visualization of High-Speed Impact of Projectile in Granular Sheet with Destructive Collision of Particles

Masaki¹,

Suzuki²,

Watanabe³

2018

JFCMV

Self Cite

View full text Add to dashboard Cite

show abstract

“…This facility was used for high-speed impact experiment of the penetrator into ice. 9) As shown in Fig. 1, the facility consists of the high-pressure chamber, the barrel tube, the accelerate tube, the adapter, and the test chamber.…”

Section: Ballistic Range and Measurement Systemmentioning

confidence: 99%

Ballistic Range Experiment of Spherical Body in Particle-laden Environment

Masaki

Watanabe

Suzuki

2018

AEROSPACE TECHNOLOGY JAPAN

Self Cite

View full text Add to dashboard Cite

Considering a spacecraft that encounters particle-laden environment, such as dust particles flying up over the regolith by the jet of the landing thruster, high-speed flight of a projectile in particle-laden environment was experimentally simulated by using the ballistic range. In case of high-speed motion, cracking of particles occurs as well as the damage on the projectile surface. To establish the experimental simulation technology and to obtain the fundamental characteristics of such complicated phenomena, a projectile was launched by the ballistic range at the velocity up to 500 m/s and the collective behavior of particles around the body was observed by the high-speed camera. To eliminate the effect of the gas-particle interaction and to focus on the effect of the interaction between the particles and the projectile's surface, the test chamber pressure was evacuated down to 30 Pa. The particles about 100-400 m diameter were scattered in the test chamber uniformly. The projectile was launched into a particle sheet in the tangential direction. The high-speed camera captured both the projectile and particle motion. From the movie, the interaction between the projectile and particle sheet was clarified. The damage on the surface of the projectile recovered after the shot was also observed.

show abstract

“…Deep-space exploration involves the detection of Solar System, Milky Way, and outer space [1][2][3]. To better understand Earth, Solar System, and the universe, various research institutions [4,5] have directed significant research attention toward the improvement of deep-space detection technology. Research on penetration detection was first carried out in the previous century.…”

Section: Introductionmentioning

confidence: 99%

Buffering Performance of High‐Speed Impact Space Penetrator with Foam‐Filled Thin‐Walled Structure

Luo

Liu

et al. 2019

Shock and Vibration

View full text Add to dashboard Cite

High-speed penetrators carrying detection equipment impact planetary bodies at high speeds, and they are therefore buried at depths of up to several meters beneath the surface. During the friction and collision with the crust of the planet, the acceleration of the scientific instrumentation is significantly large. The vibration protection structure for scientific instrumentation is necessary for the reduction of the peak value of the acceleration response and the improvement of the survival rate. In this study, a penetrator with a multilayered energy absorbing structure was developed to improve the survival rate of the penetrator, of which the foam-filled thin-walled structure (FTS) was applied to the penetrating vibration-damping structure. The penetration process of the penetrator into the planetary medium was simulated using the LS-DYNA software platform. The results obtained using empirical formulas and theoretical derivations were compared with the results of the numerical analysis. The reliability of the penetrator limit element model was then verified by conducting an impulse response experiment and simulation. The results suggest that FTS has a positive influence on the isolation impact and energy absorption. Moreover, the vibration isolation effects of nine different FTSs were evaluated with respect to the following six factors: impact isolation efficiency, load efficiency, peak of acceleration, peak impact force, total energy absorption, and specific energy absorption. Furthermore, the design of the damping structure provides an indispensable solution for penetrator detection.

show abstract

Visualization of High-Speed Impact of Penetrator into Icy Target

Cited by 9 publications

References 8 publications

Visualization of High-Speed Impact of Projectile in Granular Sheet with Destructive Collision of Particles

Visualization of High-Speed Impact of Projectile in Granular Sheet with Destructive Collision of Particles

Ballistic Range Experiment of Spherical Body in Particle-laden Environment

Buffering Performance of High‐Speed Impact Space Penetrator with Foam‐Filled Thin‐Walled Structure

Contact Info

Product

Resources

About