Finite element modeling method for human head for researching collision damage of automobile

Abstract

The invention provides a finite element modeling method for a human head for researching collision damage of an automobile. The finite element modeling method comprises the following steps: firstly, carrying out tomography and nuclear magnetic resonance scanning on the human head to obtain a tomography scanning image; secondly, importing the tomography scanning image into Mimics, and preprocessing the tomography scanning image to obtain point cloud data; thirdly, importing the point cloud data obtained in the second step into Geomagic Studio, and carrying out parameterized processing on the point cloud data to generate curved surfaces; detecting the generated curved surfaces, and fitting all the curved surfaces by using cubic Bezeir curves to obtain a three-dimensional geometrical model; fourthly, importing the three-dimensional geometrical model into HyperMesh for dividing meshes, setting the type of a unit body into a linear tetrahedral unit and optimizing local grids to obtain a three-dimensional solid model; fifthly, importing the three-dimensional solid model into Abaqus, defining characteristic parameters of tissue materials, and adding boundary and contact conditions for tissues to obtain a finite element model of the human head.

Description

technical field [0001] The invention relates to the technical field of biomechanical finite element analysis, in particular to a human head finite element modeling method used for research on automobile collision damage. Background technique [0002] Traffic injury has become one of the main social factors threatening human safety, and head injury has become the most serious traffic injury because of its high fatality. With the gradual increase of car ownership, traffic injuries in China will continue to increase in the next few years. In order to better protect the head in collisions, sports, falls and other events, it is necessary to study the potential damage mechanism and tolerance limit. [0003] At present, the main methods for studying the biomechanical response of the head include physical model tests, animal model tests, and cadaver model tests. These test models all have various limitations. With the continuous development of computer technology, mathematical mode...

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Problems solved by technology

Studies have shown that the multi-body system technology is suitable for the simulation of the overall motion response. The disadvantage is that the distribution of local detailed mechanical parameters cannot be obtained, while the finite element model spans from a simple 2D model to a complex 3D model. It can analyze in detail Dynamic Response of Car and Human Body During a Collision

However, most of the head finite element models are only used to study a specific aspect of head injury, considering that in reality, due to the diversity of injury mechanisms, there may be multiple symptoms in the skull, face or intracranial injuries. complex situation, so it is still necessary to develop a mathematical model capable of predicting all the responses of the head

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