This spreadsheet contains the data used to produce Figure 2 of the paper. All the results were generated with the finite element simulation code COMSOL Multiphysics 6.3 and refer to the concentric layers fibre structure shown in Figure 1(a) of the paper. The spreadsheet has four tabs that contain the data for: (i) panels (a) and (b); (ii) panels (c) and (f); (iii) panels (d) and (g); (iv) panels (e) and (h) respectively.