scholarly journals Optimum structure of Whipple shield against hypervelocity impact

2014 ◽  
Vol 500 (11) ◽  
pp. 112039
Author(s):  
M Lee
Keyword(s):  
Hypervelocity Impact ◽  
Optimum Structure ◽  
Whipple Shield

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.

Hypervelocity impact performance of aluminum egg-box panel enhanced Whipple shield

2016 ◽  
Vol 119 ◽  
pp. 48-59 ◽  
Author(s):  
Xiaotian Zhang ◽  
Tao Liu ◽  
Xiaogang Li ◽  
Guanghui Jia
Keyword(s):  
Hypervelocity Impact ◽  
Impact Performance ◽  
Whipple Shield

Research of Performance about Ceramic Coating on Aluminum Bumper to Resist Hypervelocity Impact

2013 ◽  
Vol 577-578 ◽  
pp. 629-632
Author(s):  
Gong Shun Guan ◽  
Qiang Bi ◽  
Yu Zhang
Keyword(s):  
Kinetic Energy ◽  
Optimum Design ◽  
Critical Thickness ◽  
Ceramic Coating ◽  
Impact Angle ◽  
Hypervelocity Impact ◽  
Front Side ◽  
Gas Gun ◽  
Whipple Shield ◽  
The Impact

Shield structure based on ceramic coating on aluminum bumper was designed, and a series of hypervelocity impact tests were practiced with a two-stage light gas gun facility. Impact velocities were varied between1.5km/s and 5.0km/s. The diameter of projectiles were 3.97mm and 6.35mm respectively. The impact angle was 0°. The damage of the ceramic coating on aluminum bumper under hypervelocity impact was studied. It was found that the ceramic coating on aluminum bumper could help enhancing the protection performance of shield to resist hypervelocity impact. The results indicated when the ceramic coating is on the front side of aluminum bumper, it was good for comminuting projectile and weakening the kinetic energy of projectile. For a certain aluminum bumper, existing a critical thickness of ceramic coating in which capability of Whipple shield to resist hypervelocity impact is the best. On this basis, the proposal of the optimum design for ceramic coating on aluminum bumper was made.

Performance of Different Metal-Foam Stuffed Whipple Shield against Hypervelocity Impact of Space Debris

2011 ◽  
Vol 488-489 ◽  
pp. 122-125
Author(s):  
Bin Jia ◽  
Feng Li ◽  
Hai Peng Gong ◽  
Bao Jun Pang
Keyword(s):  
Space Debris ◽  
Metal Foam ◽  
Low Earth Orbit ◽  
Hypervelocity Impact ◽  
Metallic Foams ◽  
Base Materials ◽  
Al 7075 ◽  
Radial Dispersion ◽  
Set Up ◽  
Whipple Shield

Hypervelocity impacts on spacecraft in low earth orbit by meteoroids and space debris poses a threat to space missions, and the use of a shield can significantly decrease the probability of a catastrophic failure. Tests have identified that metallic foams have a good shielding performance against hypervelocity impact by micro-meteoroids and orbital debris. A metal-foam stuffed Whipple shield was presented under the concept of light-weight shield structure. A meso-structure model of geometry for metallic foams was set up simulating their manufacturing process and validated by comparison with experimental results using own SPH code. Three base materials of foam, including Al 7075-T651, Ti and Al ZL102, were researched for their performances as stuff of shield by means of numerical simulation. The results indicated that different base materials show the best shield performance at different impact speeds with other conditions the same. The foam of Al ZL102 stuffed can cause the strongest radial dispersion of the secondary debris cloud and is more likely to provide the best shield performance, which is proved at the higher part of the speed range investigated.

Hypervelocity Impact Testing of a Metallic Glass-Stuffed Whipple Shield

2015 ◽  
Vol 17 (9) ◽  
pp. 1313-1322 ◽  
Author(s):  
Douglas C. Hofmann ◽  
Lee Hamill ◽  
Eric Christiansen ◽  
Steve Nutt
Keyword(s):  
Metallic Glass ◽  
Hypervelocity Impact ◽  
Impact Testing ◽  
Whipple Shield

Investigation into Damage of AL-Mesh Bumper under Hypervelocity AL-Spheres Impact

2011 ◽  
Vol 488-489 ◽  
pp. 202-205
Author(s):  
Gong Shun Guan ◽  
Bao Jun Bang ◽  
Rui Tao Niu
Keyword(s):  
Separation Distance ◽  
Hypervelocity Impact ◽  
Optimized Design ◽  
Gas Gun ◽  
Design Idea ◽  
Institute Of Technology ◽  
Whipple Shield ◽  
Impact Characteristics ◽  
Aluminum Mesh ◽  
High Influence

The aluminum mesh/plate bumper was designed by improving on AL-Whipple shield, and a series of hypervelocity impact tests were practiced with a two-stage light gas gun facility at Harbin Institute of Technology. Impact velocities of Al-spheres were varied between 3.5km/s and 5km/s. The diameters of projectiles were 3.97mm and 6.35mm respectively. The hypervelocity impact characteristics of 5052 aluminum alloy mesh bumper were studied through hypervelocity impact on aluminum mesh/plate bumpers. The fragmentation and dispersal of hypervelocity particle against mesh bumpers varying with material and specification were analyzed. It was found that the mesh wall position, diameter of wire and separation distance arrangement and mesh opening had high influence on the hypervelocity impact characteristic of aluminum mesh/plate shields. At similar impact velocity, hypervelocity impact characteristics comparison with aluminum sheet bumpers of equal areal mass was thrust. The optimized design idea of aluminum mesh/plate bumpers was suggested.

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