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Liquid Armor

Liquid Armor. By: Daniel Rey Garza MEEN 3344. Liquid Armor. Liquid armor uses a shear thickening fluid made up of hard silica particles suspended in polyethylene glycol . Since it is a liquid, it can be applied to fabrics to increase their strength such as currently existing Kevlar vests.

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Liquid Armor

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  1. Liquid Armor By: Daniel Rey Garza MEEN 3344

  2. Liquid Armor • Liquid armor uses a shear thickening fluid made up of hard silica particles suspended in polyethylene glycol. • Since it is a liquid, it can be applied to fabrics to increase their strength such as currently existing Kevlar vests. Image of Silica nanoparticles

  3. Properties/Applications • Light and flexible. • Very deformable. • Can withstand a wide range of temperatures. • Hardens under sudden application of pressure. • Returns to a liquid form after pressure is released.

  4. Comparison Normal Kevlar fabric after impact by a fragment simulating a projectile. Kevlar fabric with shear thickening fluid, after impact by a fragment simulating projectile.

  5. How it works • The shear thickening fluid acts similarly to wet cornstarch paste. As you move your finger through it slowly, it will act as a viscous fluid. If you forcefully move your finger, the cornstarch will harden preventing any further movement. After removing your finger, the cornstarch will return to it’s viscous behavior.

  6. References • http://www.rdecom.army.mil/rdemagazine/200402/itl_arl_liquidarmor.html • http://www.technovelgy.com/ct/Science-Fiction-News.asp?NewsNum=108 • http://www.military.com/NewsContent/0,13319,usa3_042104.00.html

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