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Auxetics MEEN 3344

Auxetics MEEN 3344. By: Blake Hudgeons. What Are Their Characteristics?. Auxetic materials are any material that thickens when stretched and Thins when compressed. Known as “a negative Poisson’s Ratio, ” They have both high energy absorption and fracture resistance.

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Auxetics MEEN 3344

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  1. Auxetics MEEN 3344 By: Blake Hudgeons

  2. What Are Their Characteristics? • Auxetic materials are any material that thickens when stretched and Thins when compressed. • Known as “a negative Poisson’s Ratio, ” • They have both high energy absorption and fracture resistance. • Low density to allow for the pinched areas

  3. Natural Occurring • single-crystal arsenic • catskin • load-bearing cancellous bone from human shins

  4. Current Uses • Pyrolytic graphite for thermal protection in aerospace applications. • Ni3Al in vanes for aircraft gas turbine engines. • Expanded form of PTFE used to make Gore-Tex. • Foam mops

  5. Continued Current Uses • polymeric and metallic foams • carbon fibre composite laminates • microporous polymers

  6. Possible Uses • Biomedical- Prosthetic materials, surgical implants, suture/muscle/ligament anchors and a dilator. • Filters- Any foam or honeycomb filter is a possibility. • Fibers- Bullet proof vests.

  7. Resources • http://www.azom.com/details.asp?ArticleID=168 • http://en.wikipedia.org/wiki/Auxetic • http://data.bolton.ac.uk/auxnet/index.html

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