Impact Tests of Automatic Lap Belt Configurations.

摘要

Sixteen impact tests of lap belt assemblies were performed to evaluate components for the HBU-X lap belt (now designated the HBU-12 lap belt). The lap belt assemblies were tested as part of a lap belt and shoulder harness configuration. Fifteen tests were conducted at a level of 40 G (mean = 40.2 G, S.D. =0.898) with an average impact velocity of 105.7 ft/sec (S.D. 0.976), The impact vector was applied in the -G(sub x) direction. The primary purpose of the tests was to evaluate the effectiveness of two different types of webbing adjusters. The influence of nylon, polyester, and latex-impregnated polyester was also studied. The results of the impact tests and several modes of failure including belt slippage through the adjusters and fractures of the metal attachment link of the MB-6 shoulder harness are described. Revision of design and test conditions are recommended. Originator-supplied keywords include: Restraint.