Analysis of Head Impact

A finite difference form of the governing equations of motion for one and two-dimensional wave propagation is utilized to solve the problem of non- penetrating impact to the human head. The layered plate one-dimensional analysis provides a method of predicting the influence of several material prope...

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Bibliographic Details
Main Author: Gordon, Stephen L
Format: Report
Language:English
Subjects:
BIODYNAMICS
BIOMECHANICS
BRAIN
CRASH INJURIES
ELASTIC PROPERTIES
HEAD(ANATOMY)
IMPACT
Stress Physiology
TENSILE PROPERTIES
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Summary:A finite difference form of the governing equations of motion for one and two-dimensional wave propagation is utilized to solve the problem of non- penetrating impact to the human head. The layered plate one-dimensional analysis provides a method of predicting the influence of several material property and size modifications in a geometrically simplified head impact model. The spherical model with a layered energy absorbing skull yields highly attenuated and smoothed tensile pressure peaks in the brain as compared to the results with a single layered elastic skull. An elastic brain model (that includes an assumed high dynamic shear modulus) suggests that the combined shear-normal stress levels would be more likely to cause failure than the shear free stress condition in a hydrodynamic brain model. The generality of the solution techniques would readily permit extension of the analyses to investigate the significance of future modelling considerations.