Dynamic Stress Analysis of Fracture Callus

A fracture callus changes in structural characteristics in response to changes in the dynamic loading condition during the fracture healing process. The purpose of this research is to understand the behavior of the intelligent material system during the process. In this paper, the stress wave propagation behavior of the fracture callus is investigated using finite-element analysis to estimate the structural change. It was concluded from the numerical result that the structural changes of the fracture callus relate closely to the differences in mechanical impedances between the constitutive materials in the callus. The result was experimentally verified by means of the fracture model using the femur of a rat.