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Description / Abstract:
Purpose. To statically evaluate the structural
performance of each component of the safety belt assembly.
This procedure is intended to evaluate each component of the
safety belt assembly with respect to the static structural
performance and propensity to cut webbing. Included in this
procedure are static strength tests of the: retractor, buckle
assembly, adjustable guideloop assembly, and the guideloop. The
safety belt buckle release effort test consistent with FMVSS 209
requirements is also included. Dynamic structural performance of
the safety belt assembly is comprehended primarily through barrier
and sled tests.
Applicability. This procedure applies to all
seat belt assemblies.
Remarks. This procedure requires that each
component is checked for the propensity to cut webbing and its
ultimate strength. As this procedure is written, the test engineer
is required to load the component as specified, release the load,
inspect the webbing for cuts and finally load the component to
determine the ultimate strength. The supplier at his option may
choose to perform the test as written or use either of the
following variations.
a. Check the propensity to cut webbing as stated, but use new
samples to determine the ultimate strength. Note this sequence will
require double the test samples.
b. Load the component to its ultimate strength. Inspect the
webbing for cuts and test per FMVSS 209 S5.1 (b) as required. Note
if a sample of webbing fails to meet the stated requirements, a new
set of samples must be tested for propensity to cut webbing as
stated in this procedure.