Biomechanical Mechanism And Finite Element Analysis Of Craniocerebral Injury

Objective: To study the biomechanical mechanism of craniocerebral injury, and develop a three-dimensional finite element model of craniocerebral injury.Methods : We use the head of fresh cadavers as experimental model, and then test the dynamic characteristics of human head after being impacted. At the same time we simulate the impacting test of human head through three-dimensional finite element model. At last, we can consummate the finite element model by contrasting the two results above.Results: As the structure of holes and fossas at the skull base is the center of dynamic stress, it usually easy to fracture. The fracture line often goes to the anterior fossa when the frontal part is impacted, and the fracture line usually goes to external acoustic pore when the tempus or the parietalis is impacted. Since the temporal bone and the bones near pterion are thinner, they are easier to fracture than the bones of the other parts. The distribution of dynamic stress on the head calculated by three-dimensional finite element model is similar to the result of the biomechanical experiment, and it is more intuitional.Conclusion: Finite element analysis can calculate the dynamic changes of the models, but it will reflect the distribution of dynamic stress on the head after being impacted more realistically through combining with the results of clinical study. Finite element analysis provides the more realistic experimental method and the basis of theory for the further study of the biomechanical mechanism of craniocerebral injury.