Science Advances

Supplementary Materials

This PDF file includes:

  • Supplementary Text    
  • fig. S1. Smoothing for geometric difference metric.   
  • fig. S2. Examples of auxetic structures in addition to the five selected families in the main paper.    
  • fig. S3. Computing a microstructure template from a representative structure.    
  • fig. S4. Structures with large Poisson’s ratios (ν > 0.3).   
  • fig. S5. Microstructures that resemble designs from previous works.    
  • fig. S6. Reduced parameters for family 4.    
  • fig. S7. Test apparatus for measuring Young’s modulus and Poisson’s ratio.    
  • table S1. Auxetic families and templates.    
  • table S2. Simulated and measured Poisson’s ratios of example structures. 
  • Legends for movies S1 to S3
  • Download PDF
  • Movie S1 -

    (.mp4 format). Continuous search of a microstructure using topology optimization.

  • Movie S2 -

    (.mp4 format). Shape variation of structures from family 4 along principal directions.

  • Movie S3 -

    (.mp4 format). Compression testing and simulation of example from families 1, 3, and 5.

  • Matlab files