| Nowadays, multi-disciplinary and interdisciplinary research has become one of the trends in the development of the science and technology. A valuable research field of the human body is being formed by the combination of the medical science and the biomechanics. The mechanical engineering method is used in the research depending on the rapid development of the computer technology. In this area, scientist can simulate and calculate audaciously of the human body and its physical activity. They can also reveal the phenomenon of the movement, the damage mechanisms and the pathogenesis in our life. It also adds a new impetus to the traditional mechanical area and provides an important basis for medical treatment and design of medical device.Just being inspired by previous theories, this article establishes the three-dimensional geometric model and the finite element model of the human breast lumbosacral spine. With the finite element model, we analyzed and discussed the motion and force characteristics of the normal spine movement. Besides, the deformation and stress of the spine model under different external force is contrasted, which can provide important datas to the further research of the spine biomechanics. Main tasks are as follows:1. The three-dimensional geometric model of the human breast lumbosacral spine can be seen to have used in the paper. In this process, the combination of actual measurement data and medical records as the foundation is made use of. The model is built by the SolidEdge and it can lay the foundation for the future research.2. The finite element model of the human breast lumbosacral spine is used in a specific way. The material properties and the contact relationship of the finite element model are defined by workbench. After that we divided the mesh for the model. What’s more, a theoretical model of the strength analysis for vertebral body and a theoretical model for the analysis of the contact relationship are established. 3. What has been proved is that our model effective according to the contrast verification by the analysis with our model and the experiment data in the references. On this basis, we discussed the basic mechanical issues in the spine biomechanics using our finite element model.4. An analysis of the human thoracic lumbosacral finite element model under the force is conducted, when we simulated the deformation and stress conditions in which the body is doing normal movement. We can get the deformation and the stress conditions of the spine under different external load which can be compared.5. According to CT images and case data of the patients, we find a probably load that can produce the same spine scoliosis as the patient’s spine. We hope that the scoliosis spine can be redressed by loading a reaction force.The three-dimensional geometric model and finite element model made by this research have relatively complete anatomical features and they can be used in human spine biomechanical experiments. The modeling method and the research tools used in this article may provide a new reference direction for the spinal biomechanics. |
