Erin Oneida’s framework for finite element modeling of crack propagation in multiple material structures is published:
Oneida EK, van der Meulen MCH, Ingraffea AR (2015) Method for calculating G, GI, and GII to simulate crack growth in 2D, multiple-material structures. Engineering Fracture Mechanics 140: 106-126
Just what we need for cracks in bone … nice work!