ANALYSIS OF HYBRID III LOWER LEG INSTRUMENTATION AND AN ASSOCIATED INJURY CRITERION. FINAL REPORT

This report describes a series of static and dynamic tests which were conducted on the Hybrid III lower leg instrumentation. The tests were conducted to determine the accuracy of the lower leg instrumentation measurements, the ability to calculate a maximum bending moment, and the feasibility of conducting a single impact lower leg calibration. An analysis of the bending moment distribution in the lower leg for several different load conditions showed that a proposed maximum calculated bending moment equation did not accurately predict the maximum bending moment for loadings possible in automotive crash environments. Lower leg measurements of Y-moments and X-shears were found to be accurate and repeatable for the static conditions. Measurements by the knee clevis force transducers, however, were neither accurate nor repeatable. The accuracy of Z-force and X-moment measurements was not assessed in this testing, however, neither exhibited intolerable sensitivity to cross axis loads. The feasibility of a dynamic lower leg calibration procedure was demonstrated, although response corridors were not established. The Hybrid III instrumented lower leg is shown to be effective in the measurement of X-shear at the ankle and Y-moments both in the ankle and upper tibia, although a method to determine maximum bending moment does not currently exist.

Language

  • English

Media Info

  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 34 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00719448
  • Record Type: Publication
  • Source Agency: National Highway Traffic Safety Administration
  • Report/Paper Numbers: HS-807 771,, VRTC-86-0034
  • Files: HSL, TRIS, USDOT
  • Created Date: Mar 20 2001 12:00AM