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Page Title:
Table IV. Quality Conformance Inspections - Schedule and Sequence |
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|  MIL-H-85042A(AS)
QUALITY CONFORMANCE INSPECTIONS - SCHEDULE AND SEQUENCE).
TABLE IV.
1
Inspection sequence is as listed in the table.
2
Inspect all books.
3
These inspections are performed on 1/3 of sample hooks submitted.
4
These inspections are performed On 2/3 Of sample hook's submitted.
4.6.3 Ultimate Load test. The hook shall be installed within the appropriate
test fixture in 4.5 and subjected to the test loadings as follows. Loading
shall be applied gradually until the hook is supporting the appropriate
tension load of Table II. This load shall be held for 60 seconds during which
time there shall be no fracture of the hook. After holding the load as
specified, the hooks shall be tested to destruction if ultimate strength data
is required for prestress operations (see 6.5).
4.6.4 Dynamic load (fatigue life) test. The hook shall be installed within
the appropriate test fixture in 4.5 and subjected to a "pull-pull" type test
loading as follows. The hook shall be subjected to the required dynamic load
cycles with the loads beginning at the low range, increasing to the high
The cycling rate
range, and reducing to the low range during each cycle.
shall be 1,800 or 3,600 cycles per minute with a load versus time curve that
is approximately sinusoidal. Failure of the hook to hold the dynamic loads
throughout the required dynamic cycles shall be cause for rejection. Numbers
of required cycles and loading ranges are given in Table II.
9
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