scholarly journals Dust and atmospheric influence on plasma properties observed in light gas gun hypervelocity impact experiments

2021 ◽  
Vol 151 ◽  
pp. 103833
Author(s):  
Benjamin Estacio ◽  
Gil Shohet ◽  
Sean A.Q. Young ◽  
Isaac Matthews ◽  
Nicolas Lee ◽  
...  
Keyword(s):  
Hypervelocity Impact ◽  
Plasma Properties ◽  
Gas Gun ◽  
Impact Experiments

Hypervelocity impact experiments up to 9 km/s by a compact multi-stage light-gas gun

2003 ◽  
Vol 29 (1-10) ◽  
pp. 459-467 ◽  
Author(s):  
Tatsumi Moritoh ◽  
Nobuaki Kawai ◽  
Shohei Matsuoka ◽  
Kazutaka G. Nakamura ◽  
Ken-ichi Kondo ◽  
...  
Keyword(s):  
Hypervelocity Impact ◽  
Gas Gun ◽  
Multi Stage ◽  
Impact Experiments

scholarly journals 5.8 Lunar Ejecta in Heliocentric Space

1976 ◽  
Vol 31 ◽  
pp. 458-458
Author(s):  
W.M. Alexander ◽  
M.A. Richards
Keyword(s):  
Hypervelocity Impact ◽  
Gas Gun ◽  
Impact Experiments

Studies of the parameters of micron and submicron ejecta particles from laboratory hypervelocity impact experiments have been accomplished using a light-gas-gun to accelerate milligram particles to velocities of 4 km/s onto a basalt like rock target.

HYPERVELOCITY IMPACT RESPONSE OF STITCHED CFRP LAMINATES

2021 ◽  
Author(s):  
KHARI HARRISON ◽  
KALYAN RAJ KOTA ◽  
JACOB A. ROGERS ◽  
PAUL T. MEAD ◽  
ANIKET MOTE ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
High Speed ◽  
Hypervelocity Impact ◽  
Carbon Fabric ◽  
Cfrp Laminates ◽  
Damage Propagation ◽  
Gas Gun ◽  
Back Face ◽  
Impact Experiments

In this study, hypervelocity impact experiments were performed on both unstitched and through-thickness Vectran™-stitched laminates. Both laminate types were fabricated from DMS-2436 class-72 warp-knit multiaxial carbon fabric, infused with API-1078 resin using a Controlled Atmospheric Pressure Resin Infusion (CAPRI) process. The laminates were impacted by 4 mm diameter, spherical, Nylon 6/6 projectiles at nominal velocities of 4 km/s using a two-stage light gas gun. The primary measures of the performance of the composite at protecting against impact were in plane hole damage areal comparisons and the comparison of the target back-face debris cloud (BFDC) velocities relative to the incoming projectile velocities. Additional post-shot forensics include characterization of damage morphology and analysis of high-speed videos. Initial inferences about the damage produced in the laminate indicate that the Vectran™ stitching can effectively arrest in-plane damage propagation; impacts at or near a stitchline resulted in no damage propagation across the stitchline boundaries.

Improvement of a “mini” two-stage light-gas gun for hypervelocity impact experiments: Technical devices to accelerate and detect a “minute” projectile efficiently

2005 ◽  
Vol 76 (5) ◽  
pp. 055107 ◽  
Author(s):  
Fumikazu Saito ◽  
Toshitika Usui ◽  
Hideki Tamura ◽  
Yusuke Tanaka ◽  
Michiaki Shimizu ◽  
...  
Keyword(s):  
Hypervelocity Impact ◽  
Two Stage ◽  
Gas Gun ◽  
Impact Experiments

High quality railgun HYPAC for hypervelocity impact experiments

1997 ◽  
Vol 20 (6-10) ◽  
pp. 829-838 ◽  
Author(s):  
Akira Yamori ◽  
Nobuki Kawashima ◽  
Migiwa Kohno ◽  
Shigeyuki Minami ◽  
Shinriki Teii
Keyword(s):  
Hypervelocity Impact ◽  
High Quality ◽  
Impact Experiments

scholarly journals Benefits of Using Lode Angle Dependent Fracture Models to Predict Ballistic Limits of Armor Steel

2018 ◽  
Vol 183 ◽  
pp. 01052
Author(s):  
Christian C. Roth ◽  
Teresa Fras ◽  
Norbert Faderl ◽  
Dirk Mohr
Keyword(s):  
Fracture Initiation ◽  
Strain Rates ◽  
Plastic Response ◽  
Rate Dependent ◽  
Gas Gun ◽  
Fracture Models ◽  
Armor Steel ◽  
Stress States ◽  
Impact Experiments ◽  
Single Material

Ductile fracture experiments are carried out at different stress states, strain rates and temperatures on a range of flat Mars 300 steel specimens to calibrate both a plasticity and a fracture model. To predict the onset of fracture a stress state and strain rate-dependent Hosford–Coulomb fracture initiation model is used. Single material impact experiments are performed on targets of homogenous and perforated Mars 300 plates by accelerating cylindrical Mars 300 impactors in a single-stage gas gun. It is shown that the chosen modeling approach allows accurate modeling of the plastic response as well as the fracture patterns.

Investigation into Damage of Stainless Steel Mesh/ALPlate Multi-Shock Shield under Hypervelocity AL-Spheres Impact

2012 ◽  
Vol 525-526 ◽  
pp. 397-400
Author(s):  
Gong Shun Guan ◽  
Dong Dong Pu ◽  
Yue Ha
Keyword(s):  
Stainless Steel ◽  
Impact Angle ◽  
Separation Distance ◽  
Hypervelocity Impact ◽  
Aluminum Plate ◽  
Optimized Design ◽  
Stainless Steel Mesh ◽  
Steel Mesh ◽  
Gas Gun ◽  
The Impact

A series of hypervelocity impact tests on stainless steel mesh/aluminum plate multi-shock shield were practiced with a two-stage light gas gun facility. Impact velocity was approximately 4km/s. The diameter of projectiles was 6.4mm. The impact angle was 0°. The fragmentation and dispersal of hypervelocity particle against stainless steel mesh bumper varying with mesh opening size and the wire diameter were investigated. It was found that the mesh wall position, diameter of wire, separation distance arrangement and mesh opening had high influence on the hypervelocity impact characteristic of stainless steel mesh/aluminum plate multi-shock shields. When the stainless steel mesh wall was located in the first wall site of the bumper it did not help comminuting and decelerating projectile. When the stainless steel mesh wall was located in the last wall site of the bumper, it could help dispersing debris clouds, reducing the damage of the rear wall. Optimized design idea of stainless steel mesh/aluminum plate multi-shock shields was suggested.

Experimental Investigation and Numerical Simulation of Porous Volcano Rock Hypervelocity Impact on Whipple Shield of Spacecrafts

2010 ◽  
Vol 452-453 ◽  
pp. 385-388
Author(s):  
Bin Jia ◽  
Gao Jian Liao ◽  
Hai Peng Gong ◽  
Bao Jun Pang
Keyword(s):  
Numerical Simulation ◽  
Space Debris ◽  
Geometrical Model ◽  
Hypervelocity Impact ◽  
Rear Wall ◽  
Projectile Impact ◽  
Gas Gun ◽  
Significant Damage ◽  
Speed Range ◽  
Whipple Shield

All spacecrafts in earth orbit are subject to hypervelocity impact by micro-meteoroids and space debris, which can in turn lead to significant damage and catastrophic failure of spacecraft. Porous volcano rock was adopted as one of micro-meteoroid material due to their similar physical and geometric features. Two-stage light gas gun experiments were carried out for a 6mm diameter volcano rock projectile impact on an Al-Whipple shield within the speed range from 1 km/s to 3 km/s. An ANSYS/LS-DYNA software was employed and justified by experimental results, in which a porous geometrical model was established for volcano rock projectile. The higher speed range was extended from 3 km/s to 10 km/s by numerical simulation. The results of experiments and numerical simulation indicated that major damage on rear wall of the Whipple shield impacted by volcano rock projectile is caused by the fragments of bumper of the shield, which is different from that of aluminum projectile. And 5.5km/s is the critical speed of a 6mm diameter volcano rock projectile impact on the Whipple shield investigated.

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