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US 12,055,612 B2Granted
Negative Poisson's ratio materials for energy absorption
OwnerJoon Bu Parkinventor
Life of this patent
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Abstract
Corrugated paper includes first and second sheets of paper; and a layer of structured paper disposed between the first and second sheets of paper. The layer of structured paper includes cells, in which at least some of the cells are negative Poisson's ratio (NPR) cells. Each NPR cell includes top and bottom walls, and side walls angled inwards toward a central portion of the NPR cell, such that application of a compressive force between the top and bottom walls of the NPR cell causes a lateral dimension of the NPR cell between opposite side walls to decrease. The NPR cells exhibit a Poisson's ratio of between 0 and −1.
Claims7
A corrugated paper comprising:
- first and second sheets of paper;
- and
- a layer of structured paper disposed between the first and second sheets of paper, in which the layer of structured paper comprises cells, in which at least some of the cells are negative Poisson's ratio (NPR) cells, each NPR cell comprising:
- top and bottom walls, and
- side walls comprising an NPR material, the side walls angled inwards toward a central portion of the NPR cell, such that application of a compressive force between the top and bottom walls of the NPR cell causes a lateral dimension of the NPR cell between opposite side walls to decrease;
- in which the NPR cells exhibit a Poisson's ratio of between 0 and −1.
3 more elements
Dependencies are inferred from the claim text.