Accession Number:

ADA043605

Title:

A Finite Element Head Injury Model. Volume I. Theory, Development, and Results.

Descriptive Note:

Final rept. Jun 73-Jun 77,

Corporate Author:

CIVIL ENGINEERING LAB (NAVY) PORT HUENEME CALIF

Personal Author(s):

Report Date:

1977-07-01

Pagination or Media Count:

212.0

Abstract:

The results of a head injury model development program are presented, including a description of the resulting models features and its capabilities for simulating direct and indirect impact forces. The models validity is discussed in terms of level of confidence and verification. Skull bone response and brain response are presented for a variety of dynamic simulations. Over 75 dynamic and static computer runs have been executed in its development. The basic features of the model are described, including recognizable skull geometry, linear elastic and linear visco-elastic behavior, and a capability for specifying arbitrary impact loads and boundary conditions. A special modification of the isoparametric element is shown to be particularly suited to simulation of the dynamic response of nearly incompressible brain matter. A preprocessor enables automatic mesh generation of a skull model consistent with a prescribed set of geometrical data supplied by the user. Either complete three-dimensional skulls or skulls symmetrical with respect to the midsagittal plane can be specified in the mesh generation process.

Subject Categories:

  • Biomedical Instrumentation and Bioengineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE