MIL-D-87030B(SH)
section. Start the machine and note continuously the distance between the two
bench marks, determining the elongation. Record the stress at 500 percent
elongation.
Calculate the stress by dividing the load at 500 percent elongation
by the original cross-sectional area of specimen.
Loads (pounds) at 500 percent elongation
Stress lb/in2 =
Width (inches) x thickness (inches)
No single value shall be more than the maximum requirement as specified in
table I.
The specimens shall be prepared with
4.6.1.6 Adhesion of fused tape.
fused tape seams similar to those on the end item, at least 6 inches in length.
One end of the tape shall be left free so as to leave a tab about 1 inch in
length. The test apparatus shall have an autographic recording mechanism that
shall be the same as that specified in test method 5100 of FED-STD-191. The
upper and lower jaws shall be a minimum of 1 by 3 inches with the long
dimension perpendicular to the application of load. The gauge length between
jaws shall be of such lengths so as to allow a minimum of 1 inch peel of the
fused tape from the surface of the foam. The tester shall be operated at a
uniform pulling speed of 12 ± 0.5 inches per minute. The panel and ratchet
mechanism on the tester shall be disengaged to permit reading of variable
force when the tester is placed in operation. Secure the separated foam
material of the specimen in the upper clamp and the prepared tab of the fusible
tape in the lower jaw of the tester in such a way that the longitudinal axis
of the specimen forms a right angle with the closed clamping surface.
Determine the adhesion of each specimen to the nearest 0.5 pounds as the
average of the five highest and the five lowest peak loads of resistance per 1
inch of specimen width recorded for a minimum 1 inch of separation. If the
nylon knit tape tears prior to 1 inch of separation then the force registered
to produce the tear shall be considered the adhesion of the fused tape. Any
one individual specimen result that is less than 10 pounds shall constitute
failure of test sample. The specimens shall be prepared at least 12 hours
prior to testing.
4.7 Examination of the end item. Examination of the end item shall be in
accordance with 4.5.2 and 4.5.3. The applicable inspection levels and AQL's
shall be as specified in 4.5.1. The sample unit shall be one finished suit.
The lot size shall be expressed in units of suits.
4.8 Testing of end item. The method of testing shall be as specified in
4.8.1. The leak test shall be performed by the contractor under the surveillance
of the Government quality assurance representative. A leak test shall be per-
formed on every suit produced.
4.8.1 Leak test procedure. The arm plugs and neck adapter blanking plate
will be loaned to the contractor by the contracting activity for performing
the leak test. Upon completion of the contract or testing the arm plugs and
neck adapter blanking plate shall be returned to the contracting activity. The
leak test procedure shall be as follows:
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