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head gross/lumped behavior

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  • head gross/lumped behavior

    Hello all,
    I'm looking to develop a model of head impacts to use as a first-order
    approximation to relate various head impact tolerance studies. In "the old
    days" cadaveric studies abounded. Gurdjian published some very simple
    studies of head impact utilizing cadaver heads and a steel plate. In Chapter
    6 of his book ("Head Impact Injury" 1975), he makes reference to his work
    (Gurdjian, Webster, and Lissner. "Studies on skull fracture with particular
    reference to engineering factors." Am. J. Surgery. p. 736, 1949) and
    Hodgson's work (Hodgson, Brinn, Thomas, and Greenberg. "Fracture behavior of
    the skull frontal bone against cylindrical surfaces." 14th Stapp conf, 1970
    and Hodgson, Thomas and Prasad. "Testing the validity and limitations of
    Severity Index." 14th Stapp conf, 1970). In those studies, the pre-impact
    energy was published, but the post-impact energy was not. Has anyone come
    across a reference or recorded discussion with Lissner, Gurdjian, or Webster
    where the post-impact energy of the dropped heads is recorded? To put it
    bluntly: how high did the heads bounce off of the steel plate? If there are
    any other sources of information on the dynamic impact response of the human
    head that include the skin, I would appreciate the information. Or, if
    another simple lumped parameter model exists, that would be useful as well.

    Thank you for your help,

    Robert S. Cargill II, Ph.D., P.E.
    Licensed Professional Engineer in AL, NJ, and PA

    *Cargill Bioengineering LLC*
    1207 Royal Lane
    West Deptford, NJ 08086
    215-525-4242 (Main and fax)