OS9-13 Performance Evaluation of Single Stage Diaphragmless Vertical Gas Gun for Nitrogen and Helium Gas Propellants(Shock and Hypervelocity Impact,OS9 Recent advances in impact engineering,STRENGTH OF MATERIALS)

The purpose of this work is to study the best number of layer with the higher impact energy using Glass Fibre Reinforced Polymer (GFRP). The number of layers used in this study was 25, 33, 41, and 49. The impact test was performed using Single Stage Gas Gun (SSGG) for each layers given above with different bullets such as blunt, hemispherical and conical bullets. The gas gun pressure was set to 5, 10, 15 and 20 bar. All of the signals captured from the impact test were recorded using a ballistic data acquisition system. The correlation between the impact energy in terms of number of layer and type of bullet from this test are presented and discussed. It can be summarise that as the number of layer increases, impact energy also increases. In addition, from the results, it was observed that by using different types of bullets (blunt, hemispherical, conical), there is only a slight difference in values of energy absorbed by the specimen.

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Performance Evaluation of Anaerobic Biodegradation of Synthetic Phenolic Waste Water in Single Stage Fixed Bed Bio- Reactor

International Journal of Science and Research (IJSR) ◽

10.21275/v4i11.nov151564 ◽

2015 ◽

Vol 4 (11) ◽

pp. 1909-1913

Keyword(s):

Waste Water ◽

Performance Evaluation ◽

Fixed Bed ◽

Anaerobic Biodegradation ◽

Single Stage

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

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.525-526.397 ◽

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.

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