This data set accompanies the Granular Matter paper: "Discrete element simulation of railway ballast: modelling cell pressure effects in triaxial tests" by John Harkness, Antonis Zervos, Louis Le Pen, Sinthuja Aingaran and William Powrie The zip file contains laboratory and simulation data for the following figures in the paper: Figure 2 Lab and sim 15kPa.txt Figure 3 lab and sim 200kPa.txt Figure 5 vary friction angle 200kPa.txt Figure 6 vary stiffness 200kPa.txt Figure 7 best fit 500kPa stiffness.txt Figure 8 cyclic loading comparison.txt Figure 10 percentage non crushing contacts with radius.txt Figure 11 histogram of alpha.txt Figure 12 best fit conical damage model.txt Figure 13 histograms of normal force 15kPa and 200kPa.txt Figure 16 tan phi as a function of normal force.txt Figure 17 conical damage with power law friction 15kPa.txt Figure 18 conical damage with power law friction 30kPa.txt Figure 19 conical damage with power law friction 200kPa.txt Figure 20 conical damage with damage dependent friction 15kPa.txt Figure 21 conical damage with damage dependent friction 30kPa.txt Figure 22 conical damage with damage dependent friction 200kPa.txt Figure 23 conical damage with damage dependent friction cyclic loading 55kPa.txt