Microstructures to control elasticity in 3D printing

@article{Schumacher2015MicrostructuresTC,
  title={Microstructures to control elasticity in 3D printing},
  author={Christian Schumacher and B. Bickel and Jan Rys and Steve Marschner and Chiara Daraio and Markus H. Gross},
  journal={ACM Transactions on Graphics (TOG)},
  year={2015},
  volume={34},
  pages={1 - 13}
}
We propose a method for fabricating deformable objects with spatially varying elasticity using 3D printing. Using a single, relatively stiff printer material, our method designs an assembly of small-scale microstructures that have the effect of a softer material at the object scale, with properties depending on the microstructure used in each part of the object. We build on work in the area of metamaterials, using numerical optimization to design tiled microstructures with desired properties… 
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