(a)
(b)
(c)
(d)
Figure 11: A cross-section (SPH points inside the range) of the unit cell under confining stress . Green points correspond to gas particles, yellow points to water particles, black points to rigid phase particles, cyan points to intact elastic particles, and other colors to elastic particles damaged to various degree with magenta corresponding to completely damaged particles. Images correspond to (a) = 4 s, (b) = 52 s, (c) = 80 s, and (d) = 92 s.