Accession Number:

AD0767319

Title:

Analysis of Head Impact

Descriptive Note:

Interim rept.

Corporate Author:

NAVAL AIR DEVELOPMENT CENTER WARMINSTERPA CREW SYSTEMS DEPT

Personal Author(s):

Report Date:

1973-04-01

Pagination or Media Count:

136.0

Abstract:

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.

Subject Categories:

  • Stress Physiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE