A Mathematical Model of Head Injury Due to Axisymmetric Impact

Abstract

To demonstrate the mechanisms and provide insight into the dynamics occurring within the human head during short-duration localized impacts, the head has been modeled as a viscoelastic core bonded to a thin viscoelastic spherical shell simulating the brain and the skull, respectively. The potential head injury mechanisms such as cavitation caused by excessive tensile stress and rotation produced by large shear strain, along with their possible damage locations have been demonstrated by applying an axisymmetric impact over a small area of the shell. Linear viscoelastic properties are assumed for both the core material and the shell. Solution to the second order matric differential equation has been obtained through an iterative method.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1974
Accession Number
ADA004775

Entities

People

  • Han Sun Chan

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Air Force
  • Axisymmetric
  • Biomedical Research
  • Brain Injuries
  • Craniocerebral Trauma
  • Equations
  • Equations Of Motion
  • Finite Element Analysis
  • Government Procurement
  • Governments
  • Head Injuries
  • Mechanics
  • Numerical Analysis
  • Pressure Distribution
  • Shear Stresses
  • Stresses
  • Tensile Stress

Readers

  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Neurotrauma and Rehabilitation Medicine.
  • Structural Dynamics.