Current finite element models of head impact involve a geometrically simplified fluid-filled shell composed of homogeneous, linear and (visco) elastic materials as the primary surrogate of the human skull and brain. The numerical procedure, which solves the mechanical response to impact, requires and presumes continuity of stress and displacement between elements, a defined boundary condition simulating the neck attachment and a known forcing function.Our critical review of the models discussed, primarily, the technical aspects of the approximations made to simulate the head and the limitations of the proposed analytical tools in predicting the response of biological tissue. The following critical features were identified as major factors which compromised the accuracy and objectivity of the models: Although significant progress has been made in the development and refinement of finite element models of head impact, the available computer programs represent mechanical simulations which are inadequate to establish tolerance criteria or predict head injury. In fact, the models are only a qualitative simulation of a simplified head surrogate, and as such, constitute merely the first approximation of one aspect of a highly complex biological problem.


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    Title :

    Critical Issues in Finite Element Modeling of Head Impact


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    26th Stapp Car Crash Conference (1982) ; 1982



    Publication date :

    1982-02-01




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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