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Unformatted text preview: 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, ” V1 They have both high energy absorption and fracture resistance. Low density to allow for the pinched areas Natural Occurring singlecrystal arsenic catskin loadbearing cancellous bone from human shins 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 GoreTex. Foam mops Continued Current Uses polymeric and metallic foams carbon fibre composite laminates microporous polymers 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. 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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This note was uploaded on 07/07/2011 for the course MAE 315 taught by Professor Wu during the Spring '08 term at N.C. State.
- Spring '08