MATHEMATICAL MODEL TO PREDICT SKULL FRACTURE UNDER IMPACT LOADS

The significant correlation of skull fracture with fatal head injury suggests such fracture prevention to be a useful minimal design criterion. A spherical cap under dynamic local loading is recommended as an effective mathematical model to assess skull fracture. With finite difference techniques in space and time, the governing large deformation cap equations are solved for a circular load area. For load pulses of practical significance, the only parameters of concern are load area, load amplitude, skull thickness and maximum allowable stress. Curves are presented of fracture load with load area for various skull thicknesses. Results suggest that increasing the load area greatly diminishes the possibility of fracture. Hence, helmet and vehicle designers should aim towards this end.

• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Perrone, N
• Publication Date: 1976-10

Media Info

• Features: References;

Subject/Index Terms

• TRT Terms: Automobiles; Biomedical engineering; Biophysics; Crash tests; Dynamic loads; Fatalities; Finite differences; Forecasting; Fracture mechanics; Head; Helmets; Injuries; Mathematical models; Motorcycles; Personnel; Protective clothing; Safety equipment; Structural models
• Uncontrolled Terms: Fracture
• Old TRIS Terms: Physiological models
• Subject Areas: Bridges and other structures; Highways; Research; Safety and Human Factors; Society;

Filing Info

• Accession Number: 00159882
• Record Type: Publication
• Source Agency: Engineering Index
• Report/Paper Numbers: SAE Spec Pub SP-412
• Files: TRIS
• Created Date: Dec 27 1977 12:00AM