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Material Energy Loss Testing with AirSoft Gun: Aluminum, Plastic, Composite

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gloriadouglas
20 diapositives · 247 Views · Jan 03, 2020

Testing energy loss of AirSoft BB hitting Aluminum Foil, Plastic, and Composite materials using a 350 fps AirSoft AEG rifle. Evaluate properties of Aluminum, Copper, Magnesium, Manganese, Silicon, Zinc. Results and implications for real-life applications discussed.

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Material Energy Loss Testing with AirSoft Gun: Aluminum, Plastic, Composite
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  1. Testing Process • From a certain distance, we tested for the amount of energy lost by the AirSoft BB, when it hit Aluminum Foil, Plastic and a Composite.

  2. Materials • Aluminum Foil • Plastic Garbage Bags • Composite with Aluminum Foil and Plastic Garbage Bags

  3. Gun Specs • 350 fps (0.2 g BB) • Full Size Automatic M15A4 Air soft AEG (Air soft Electric Gun) Rifle • Adjustable Hop-up system

  4. Properties of Materials

  5. Details of Aluminum Copper:increases the strength and hardness and makes the alloy heat-treatable; Magnesium: increases tensile strength, resistance to marine corrosion, weld ability and hardness; Manganese: increases strength and resistance to corrosion; Silicon: lowers the melting point and improves castability; Zinc: improves strength and hardness.

  6. Setup

  7. Aluminum Foil Testing Aluminum Foil Testing Distance to Target 10 Feet • 10 Sheets • 11 Sheets • 12 Sheets • 13 Sheets Went Through Were Stopped Layers Used 9 5 3 1 1 5 7 9

  8. Garbage Bag Testing Plastic Distance to Target 6 Feet away Went Through Were Stopped Layers Used • 3 Sheets • 4 Sheets • 5 Sheets 10 8 0 0 2 10

  9. Composite Testing Composite Testing Distance to Target 6Feet • 4 Plastic/ 5Al • 3 Plastic/ 4Al • 2 Plastic/ 3Al Went Through Were Stopped Layers Used 1 10 10 9 0 0

  10. Failures

  11. Results For Aluminum Foil 10 sheets: Vinitial=350 ft/sec = 107 m/sec 38in=.97m Yfinal= 1/2gt2 .97=1/2(9.8)t2 t= 0.44sec Xfinal = 38ft Xfinal= vt v= 26.3 m/sec E= 1/2mv2 Einitial =(107 m/sec)(.2g)*1/2 = 0.1145 J Efinal= 0.069 J Elost= 4.5x10-2 J

  12. Results Cont. For Plastic 4 sheets: Xfinal= 12ft v= 8.31 m/sec Efinal= 0.0069 J Elost= 1.08x10-1 J Xfinal= 20ft v= 13.9 m/sec Efinal= 0.019 J Elost= 9.53x10-2 J For Composite 3-plastic 4-Al sheets:

  13. Real Life • Aluminum is the most abundant metal on earth. • Building & Construction Industry • Manufacture of Electrical Products • Packaging & Containers • Cooking Utensils • Aeronautical, Aviation & Automotive Industries • Leisure Goods

  14. What This Means • The aluminum is relatively light and is best used for retaining its shape after being molded and for hard protective coatings, but are easily subjective to cold working making it more brittle. • By only using plastic you have a material that is flexible in most situations, or it could allow the material to dissipate energy and still retain its original structure. • Composite material gives the hardness needed like aluminum as well as the flexibility of needed in high impact situations as in plastic • The strength to weight ratio in the composite would be the best if the cost of the material is expensive. • Composite Example: Plexi-glass, laminated glass for hockey rinks and for bullet proofing.

  15. Gun Safety

  16. Sources • http://www.efunda.com/materials/alloys/aluminum/properties.cfm • en.wikipedia.org/wiki/Aluminium_foil • http://www.azom.com/details.asp?ArticleID=1446 • http://www.key-to-nonferrous.com/default.aspx?ID=CheckArticle&NM=142 • http://www.tomago.com.au/alum/uses.html • http://pubs.acs.org/cen/whatstuff/stuff/8238plasticbags.html • http://www.airsplat.com/