Data for Auxetic Structures Submission

Contained with this note are the files for the recreation of the results.
All Finite Element files used Ansys Workbench 2021 R2.
The digital image correlation used Matlab R2020b with n_corr, which can be downloaded from the following URL:

https://ncorr.com/

This will be required to open the matlab files.

The files are as follows:

The As_Tested_FEA contains the Re-entrant and Cubic Star cells set up to imitate the physical tests.

The Isotropy_Study_Models contains the global (approximately 5x5x5, dependent on Geometry) cell models and are set up with the 0,0 displacement.
I have left out the full data set with various angles to keep this compact, but the results can be re-created by changing the approach angle parameters in Ansys and re-running.
The following angles were tested:

Cubic Cell: [0,0] [0,15] [0,30] [0,45] [15,0] [15,15] [15,30] [15,45] [30,0] [30,15] [30,30] [30,45] [30,22.5] [45,0] [45,15] [45,30] [45,45]
Combined Tetrahedral-Octahedral Cells: [0,0] [0,15] [0,30] [0,45] [0,60] [15,60] [20,45] [30,30] [30,60] [40,45] [45,60] [60,15] [60,30] [60,45] [60,60]
Dodecahedral Cell: [0,0] [0,10] [0,20] [0,30] [6,30] [12,30] [15,10] [15,20] [18,30] [24,30] [30,10] [30,20] [30,30] [7.5,20] [22.5,20]
Anti-Chiral: [0,0] [0,15] [0,30] [0,45] [15,0] [15,15] [15,30] [15,45] [30,0] [30,15] [30,30] [30,45] [22.5,30], [45,0] [45,15] [45,30] [45,45]
Chiral: [0,0] [0,15] [0,30] [0,45] [15,0] [15,15] [15,30] [15,45] [30,0] [30,15] [30,30] [30,45] [22.5,30], [45,0] [45,15] [45,30] [45,45]
Re-Entrant: [0,0] [0,15] [0,30] [0,45] [0,60] [0,75] [0,90] [9,75] [27,75] [30,60] [45,30] [45,45] [45,75] [45,90] [22.5,15] [22.5, 90]

Optimisation_Models contains the parametric optimisation approach used on the cells. Included is an Excel document with the parametric history for each cell type.
These models also demonstrate the setup of the boundary conditions used to simulate an infinite grid.

Please note, the models used for the Chiral cell, Re-entrant cell and anti-chiral cell were not optimised in this study, the cells being based on those from:
Chiral Cell: Ha et al, 2016, DOI: 10.1002/PSSB.201600055
Re-Entrant Cell: Yang et al, 2015, DOI: 10.1007/s11837-015-1322-y
Anti-Chiral Cell: Ha et al, 2019, DOI: 10.1002/pssb.201800512

Physical_Testing contains the Images used for the n_corr analysis and the Ncorr data to enable re-creation