Dynamic tests of a yielding seat belt system

The performance of crash protective seat belts can be improved by incorporating energy absorbers to allow the system to yield at constant force. As upper torso restraint is desirable but strength for attachment is limited in aircraft, dynamic tests were carried out with lap/sash seat belts incorporating energy absorbers in the sash (shoulder) straps. The tests showed that with energy absorbers allowing an increase in dummy movement of five inches or less the shoulder strap forces could be reduced by 30 per cent. Alternatively energy absorbers allowed an increase of 50 per cent on the input deceleration without increase in shoulder strap force. It was considered that energy absorption in the seat and lap belts could allow similar improvement in these components. The load distribution between the straps and the friction force between the dummy and seat was examined and it was found that the seat force was of similar magnitude to the combined lap strap forces.

  • Corporate Authors:

    Aeronautical Research Laboratories

    Melbourne, Victoria   
  • Authors:
    • Sarrailhe, S R
  • Publication Date: 1972-6


  • English

Media Info

  • Pagination: 12p + appendices
  • Serial:
    • Issue Number: 340

Subject/Index Terms

Filing Info

  • Accession Number: 01389000
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Aug 23 2012 2:37AM