(Nanowerk Spotlight) Poisson's ratio describes the fundamental elasticity of any solid. Conventional materials contract laterally when stretched and Poisson's ratio expresses the ratio of transverse ...
If the Poisson’s ratio of the material if positive, then tensile/compressive strains in the x-direction produce compressive/tensile strains in the y- and z-directions, as shown below. Negative Poisson ...
The defining property of an auxetic material is, then, that it possesses one or more negative Poisson’s ratios (as opposed to the positive Poisson’s ratio displayed by ‘normal’ materials). Do you have ...
Australia's Defence Science & Technology Organisation (DSTO) has identified a range of aerospace uses for negative Poisson ratio (NPR) materials and recommends further research. NPR materials become ...
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The Bizarre Mechanism That Gets Smaller the Harder You Pull It
Researchers have discovered a mechanism with a counterintuitive response: it becomes smaller when pulled. This rare behavior, known as a negative Poisson’s ratio, defies the way most natural materials ...
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