Finite Element Modeling Of Human Abdomen For Automotive Impact Injury And Key Techniques In Simulation

Have been a common type of injuries in car collision accidents，abdominal injury is animportant area of car safety research. Injury biomechanics can be used to research therelationship between stress and injury of abdominal under car crash, thus the injury severitycan be estimated by pathological damage and damage limit, and then some protectivemeasures carried out which should be considered during car body structure design stage.This paper uses a combination of means, such as medical imagelogy, anthropotomy, FEM andinjury biomechanics, builds finite element model of abdomen by exploiting image data of CT,which can be used for car crash safety research.In order to obtain the image data, which saved as DICOM format, a CT scanning for amale volunteer who is175cm height and68kg weight is carried out. With professional imageprocessing software for medical application,3D reconstruction of abdomen of human body isdone, to get the corresponding CAD model. After meshing appropriately of it, the CAE modelof abdomen which is up to standard of human body anatomy is generated. The whole CAEmodel has433572nodes,362033elements,20.2kg weight after material definition, andincludes parts as follows, Spine（T1-T12、L1-L5）、sternum、ribs、pelvis、heart、lung、liver、stomach、kidney and so on.According to result of the cadaveric pelvis side-crash tests which was done by Guillemotin1998, the pendulum side-crash test which was done by Viano in1989and the vergo frontcrash test which was done by Cavanaugh in1986, the validity of the abdomen FE model isverified. The graph partition and meshing during the building process of abdomen FE modelhas a great effect to the biological biofidelity hyge, the influencing mechanism isdiscussed in this paper. Then, the mechanical property research of the animal tissue is carried,the validity of the material parameter is verified combine with the FE simulation.The results show that the finite element model of abdomen built in this paper hasaccurate simulation characteristics, can be used for occupant safety protection research.