Study of finite element simulation of bone drilling

A Bone fracture often happens due to an accident and old age. Broken bones are fixed by connection elements that is mounting on the drill holes. So many attempts have been done to reduce thermal necrosis and drilling force. To predicate thermal necrosis and drilling force, Finite Elements Modeling (FEM) has been considerably utilized recently. In this study, bone drilling has been simulated by commercial DEFORM/3D. This software has a special module in machining process. So, it is user friendly, easier, and faster than other FE software. Due to the anisotropy of the bone, The Hill equation was used to define the material properties. Rotational speed and Feed rate as two inputs were changed in three levels, a total of 32 =9 tests were designed and its simulation was performed in three dimensions and compared with experimental tests. The results of computer simulations and experimental experiments have shown high agreement. The error rate between the experimental and simulation values was a maximum of 10% for force and 7% for temperature.