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An Experimental Examination of Seatbelt Webbing Loading Marks on Automobile Plastic D-Rings

[+] Author Affiliations
H. Alex Roberts, Mark R. Martin, Troy J. Canalichio

Renfroe Engineering, Inc.

Paper No. IMECE2004-60797, pp. 71-75; 5 pages
doi:10.1115/IMECE2004-60797
From:
  • ASME 2004 International Mechanical Engineering Congress and Exposition
  • Engineering/Technology Management: Safety Engineering and Risk Analysis, Technology and Society, Engineering Business Management
  • Anaheim, California, USA, November 13 – 19, 2004
  • Conference Sponsors: Safety Engineering and Risk Analysis Division, Technology and Society Division, and Management Division
  • ISBN: 0-7918-4720-9 | eISBN: 0-7918-4178-2, 0-7918-4179-0, 0-7918-4180-4
  • Copyright © 2004 by ASME

abstract

This paper documents experimental research determining the belt forces required to create visible and distinct markings on plastic automobile D-rings. The “D-Ring” is the loop through which the shoulder belt feeds before reaching the retractor. In the experimental configuration, ballast is attached to the belt webbing and dropped from a predetermined elevation. By varying the drop height the belt loading characteristics were also changed. Photographs document the resulting loading marks. A Mathematical Dynamic Modeler was used to calculate the Rigid Body Dynamic models to determine occupant belt loads from 5th and 50th percentile Hybrid III anthropomorphic test devices under various crash pulse conditions. These values were correlated to the experimental research. Conclusions are made relating D-ring markings to the delta-V of an automotive accident.

Copyright © 2004 by ASME

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