Design of Hierarchical Structures for Synchronized Deformations

@article{Seifi2017DesignOH,
  title={Design of Hierarchical Structures for Synchronized Deformations},
  author={Hamed Seifi and Anooshe Rezaee javan and Arash Ghaedizadeh and Jianhu Shen and Shanqing Xu and Yi Min Xie},
  journal={Scientific Reports},
  year={2017},
  volume={7}
}
In this paper we propose a general method for creating a new type of hierarchical structures at any level in both 2D and 3D. A simple rule based on a rotate-and-mirror procedure is introduced to achieve multi-level hierarchies. These new hierarchical structures have remarkably few degrees of freedom compared to existing designs by other methods. More importantly, these structures exhibit synchronized motions during opening or closure, resulting in uniform and easily-controllable deformations… 
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References

SHOWING 1-10 OF 40 REFERENCES
On the potential of connected stars as auxetic systems
Auxetic materials and structures exhibit the unexpected behaviour of getting wider when stretched and thinner when compressed. This behaviour requires the structures (the internal structure in the
On the auxetic properties of rotating rhombi and parallelograms: A preliminary investigation
Auxetics exhibit the unusual property of expanding when uniaxially stretched (negative Poisson's ratio), a property that is usually linked to particular geometric features and deformation mechanisms.
Engineering the shape and structure of materials by fractal cut
TLDR
The present work addresses the simple modification of any material via hierarchical cut patterns to allow for extremely large strains and shape changes and a large range of macroscopic shapes.
Materials and Mechanics for Stretchable Electronics
TLDR
Inorganic and organic electronic materials in microstructured and nanostructured forms, intimately integrated with elastomeric substrates, offer particularly attractive characteristics, with realistic pathways to sophisticated embodiments, and applications in systems ranging from electronic eyeball cameras to deformable light-emitting displays are described.
Simple cubic three‐dimensional auxetic metamaterials
Elastic instability of soft cellular solids plays an increasingly important role in the creation of metamaterials with smart properties. Inspiration for much of this research comes from a planar
Hierarchical Auxetic Mechanical Metamaterials
TLDR
Using simulations on typical hierarchical multi-level rotating squares, it is shown that, through design, one can control the extent of auxeticity, degree of aperture and size of the different pores in the system, making the system more versatile than similar non-hierarchical ones.
Three-dimensional cellular structures with negative Poisson's ratio and negative compressibility properties
A three-dimensional cellular system that may be made to exhibit some very unusual but highly useful mechanical properties, including negative Poisson's ratio (auxetic), zero Poisson's ratio, negative
...
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