EVALUATION OF THE STRENGTH OF ANCHORAGES NEEDED FOR ATTACHMENT OF CHILD RESTRAINT TETHER BELTS

The objective of this research was to determine, in simulated 30 mph crash tests, the strength requirements of the tether belt anchor points for safe attachment of child restraint systems. Phase I work involved the design and tensile tests of static load devices for the evaluation of the strength of the anchor points. These devices were designed for static yield strengths of 765, 1200, and 1500 pounds and were fabricated from .037 inch thick cold-rolled sheet steel. A total of eight units was made for the dynamic tests. Phase II work consisted of dynamically testing the static load devices in sled tests employing two types of child restraints and four different weight anthropomorphic dummies. The devices were mounted between the anchor points and the connecting end of the child restraint tether belts. Load cells, mounted on the tether webbing material, monitored the strap loads. The dynamic tests indicated that the 1200 pound load device was approximately the correct size to support all of the various weight dummies, although, in one test, it began to yield under a peak strap load of 2240 pounds.

• Corporate Authors:

  Calspan Advanced Technology Center

  4455 Genesee Street
  Buffalo, NY  United States  14225

  National Highway Traffic Safety Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Naab, K N
• Publication Date: 1982-3

Media Info

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

Subject/Index Terms

• TRT Terms: Anchorages; Child restraint systems; Crash tests; Crashes; Dummies; Dynamic tests; Manual safety belts; Sled tests; Testing; Yield strength
• Old TRIS Terms: Tether belts
• Subject Areas: Highways; Research; Vehicles and Equipment; I91: Vehicle Design and Safety;

Filing Info

• Accession Number: 00394323
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: 6945-V-1 Final Rpt., HS-806 639
• Contract Numbers: DTNH22-81-P-02089
• Files: HSL, TRIS, USDOT
• Created Date: Jun 30 1985 12:00AM