Micro FEM Simulations of Sawing of Cortical Bone

This project aims to develop a model at the micro-scale that predicts mechanical properties based on imagery/ structural composition of a cortical bone modeled as a heterogeneous bio-composite material. Mechanical and structural properties predicted by the developed model will be used to develop a micro flow stress model used as input to FEM model to predict macro cutting forces since cutting of bone is mandatory in a wide range of operations dealing with orthopedic, cardiothoracic, neurological, osteotomy and maxillofacial procedures. Four major steps were investigated through this micro-structural perspective. First, properly identify the micro-structural architecture. Second, assign the proper mechanical properties of these various features. Third, build a consistent model of the bone and the tool. Finally, simulate the bone cutting process numerically and validate through experimentations. Such a predictive model may aid surgeons in planning/conducting orthopedic procedures especially in the up and coming tele-surgery and robots; in addition it may help design engineers developing enhanced surgical sawing tools.