Development And Validation Of A Series Of Finite Element Model Of Child Neck

In recent years,children's casualties have remained high in traffic accidents.The problem of children's ride safety needs to be solved urgently.However,due to the prohibition of social morals and ethics and the difficulty in obtaining samples of children's corpses,the progress of research on the injury mechanism and protection methods of children's occupants is slow.In order to promote the study of children's riding safety,a parametric child neck finite element mesh model based on age,height and body finger was established and verified in this study,and it was spliced with the parametric child head finite element model to establish and verify the parametric child head and neck finite element model was developed.The main research work is summarized as follows:In this paper,a sample of 60 children of multiple ages was collected with a medical CT scanner,and geometric preprocessing,marker extraction,spatial orientation calibration,and mathematical statistical analysis were performed on it to build a children's cervical spine feature database and quickly obtain children's neck geometry through children's human characteristics.Using the mesh deformation method,the corresponding full-neck geometry of the child is automatically transformed into a corresponding mesh,and a parameterized child cervical spine digital mesh model with freely and continuously variable size is established.The research shows that the model has good mesh quality and geometric accuracy.The established cervical spine model was positioned,and the key points of the head were spliced strictly in accordance with the physiological anatomy and the finite element model suitable for the head and neck parameters of Chinese children was determined.A custom program was developed to realize automatic splicing.Further,a large number of corpse experiments and corresponding parameters of the material constitutive equation were defined,and a software platform based on the material parameters of children's neck biological tissues was developed.Through this platform,the neck material parameters of children of all ages could be quickly obtained.Establishment of a finite element model for Children's head and neck is completed.Establishment of the children's head and neck finite element model of C0_T1 was simulated and verified to overcome the limitations of a large number of repeated experiments.The verification results showed that the established neck model has high biological fidelity.It can provide an effective tool for the research of child occupant injury protection and has important theoretical significance and practical value.