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

Download Full-text

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

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.577-578.629 ◽

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.

Download Full-text

Effect of replacement strike-face material on the ballistic performance of multi-ply soft armor targets

Textile Research Journal ◽

10.1177/0040517517753641 ◽

2018 ◽

Vol 89 (5) ◽

pp. 711-725 ◽

Cited By ~ 7

Author(s):

Zherui Guo ◽

Weinong Chen ◽

James Zheng

Keyword(s):

Stainless Steel ◽

Energy Dissipation ◽

Material Properties ◽

High Performance ◽

Ballistic Limit ◽

Stainless Steel Mesh ◽

Ballistic Performance ◽

Gas Gun ◽

The Impact ◽

Armor System

In this study, the impact-face material of a multi-ply soft armor system was varied to different ratios and tested for the effects on the ballistic performance. It is known that the first few layers of multi-ply soft armor material typically fail inelastically near the system ballistic limit and can be replaced with a “sacrificial” material with other more desirable properties. Previous studies have determined that the ballistic performance of these hybrid systems is largely dependent on the amount of high-performance backing material. However, the extent to which the high-performance fabric can be replaced has yet to be fully quantified and examined. Materials of different properties, namely stainless steel mesh, Makrolon® polycarbonate sheets, and cotton, were used as replacement frontal material for 840 d Twaron® panels, and the hybrid panels were impacted by O1 tool steel right-circular cylinder projectiles fired using a single-stage smooth-bore gas gun. Results show that the ballistic performance is maintained up to a frontal material ratio of about 40%, and off-axis material properties play a role in energy dissipation.

Download Full-text

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

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.488-489.202 ◽

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.

Download Full-text