  Understanding the mechanical response and failure of consolidated
extra-terrestrial soils requires analyses of the interactions between
propagating cracks the material's inherent pore structure. In this work, we
investigate the fracture behaviour of lunar soil simulant consolidated using
microbially induced calcite precipitation (MICP). We develop a numerical
framework, based on a lattice network with local beam elements, to simulate the
nucleation, propagation, branching and merging of multiple cracks within the
sample. Our simulations capture the effects of local pores on crack paths as
well as provides a means to predict the behaviour of samples with varying
global porosity and/or uncertainties in local material stiffness. We identify
multiple statistical lattice parameters that encode signatures of single or
multiple crack growth events. Our results reveal the complexities involved in
the fracture process with porous brittle solids and may easily be adapted to
understand failure mechanisms and micro/macro crack evolution in other
consolidated structures.
