Negative poisson's ratio materials for energy absorption
OwnerJoon Bu Parkinventor
Life of this patent
Estimating the term…
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.
Claims22
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 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.
A window comprising:
- a window frame comprising:
- an exterior layer defining an exterior surface of the frame,
- an interior layer defining an interior surface of the frame, and
- a middle layer disposed between the interior layer and the exterior layer, in which the middle layer comprises a negative Poisson's ratio (NPR) foam material having a Poisson's ratio of between 0 and −1;
- and
- a window pane disposed within an interior space defined by the frame.
An magnetic resonance imaging (MRI) scanner, the MRI scanner comprising:
- a housing defining an interior bore;
- and
- a magnetic field generation system disposed in the housing,
- in which an exterior surface of the housing comprises an NPR material.
Dependencies are inferred from the claim text.