Analysis Of Biomechanical Response For Head Impact

Automobile possession increase year by year with the development of Chinesenational economy, and traffic accident is also followed frequently. In a large amount oftraffic accident, the proportion of head injury is very important, the high of disabilityrate and mortality cause many social and economic problems, such as directlyeconomic loss and family misfortune. So all over the world attach importance to theresearch and protection technology of head injury mechanism, and the research isdevoted a lot of manpower and material resources.The human head has complex anatomy structure extremely, and it includes themost important organ of the human central nervous system, so the research means isrestriction extremely. In the past few decades, the researchers advanced manyhypotheses in the research field of head injury mechanism, but the theory of injurymechanism still needs to be improved in real meaning. In this paper, the head anatomyand injury mechanism are research, and finite element analysis software ABAQUS and3D modeling software CATIA are set as tools, and a reasonable finite element model ofhuman head is established, the biomechanical responses of human head and the effectfactors of head injury are analyzed in traffic accident by finite element methodThis paper research the head model in relevant article and the human biologicform, and the geometric model of human head according with actual structure isestablished by3D modeling software CATIA. The head model is simplifiedappropriately because of the complexity of human head. In order to verify therationality of the head model, the model is imported into software ABAQUS, and themeshing computer experiment is done. The computer experiment by the calibration testmethod of head show that, it can ensure calculation accuracy when the element size is2mm, the maximum synthetic acceleration of head injuriy is2305m·s-2, satisfy the headcalibration tests, that is the result between205to2695m·s-2. The results determine thatthe head model is reasonable.The biomechanical response is simulated which the head impact automobileengine cover plate by the software ABAQUS, and three factors is analyzed whichinclude the velocity of automobile, the thickness of cover plate and impact angle. Thecomputer experiments show that, if the cover plate is thicker and thicker, impactvelocity and impact angle is bigger and bigger, the head injury is more serious. Theresearch method provides reference for the study of automobile safety and head injury protection.