Optimization of Artificial Bone Internal Structure by Topology Optimization: Finite Element Analysis

Demand for artificial bone based on titanium metal is huge. The 3-D finite element analysis software is used to simulate the force of the bone model, and the internal structure of the model is optimized by the topology optimization method for material saving. The bone is scanned by computed tomography and then a normal 3-D finite element bone model is built on the computer. Based on the normal model, apply force to the model and determine the pressure distribution of the model, and then an internal structure is optimized by topology optimization method. Four basic type of bone forces which are tension, pressure, bending and torque force are applies to the bone model. The result given by the topology optimization method is a multi-layered ring structure inside the bone model, and in each layer there are certain number of pores. The artificial bone structure proposed in this paper can satisfy the basic force of the bone with using minimum of material.