ASTM D624 is a testing standard
for measuring the tear strength of thermoset rubbers, thermoplastic elastomers,
and silicones. This standard describes
multiple different types of sample shapes (Type A, B, C, T, and CP) that can be
tested in a standard universal testing machine. Usually materials that are
tested to D624 are also tested according to specification ASTM D412 to measure
the tensile strength and elongation. Record the maximum force for Type A, B or
C specimens. For Type T or CP specimens record the force continuously during
rupture.
The usual practice is to test
with the grain running the length of the test piece. For Type A, B and C test
pieces, the tear would thus be recorded as across the grain. It is to be assumed,
unless otherwise speciļ¬ed, that all Type A, B or C test pieces are prepared in
this manner. Type T and CP test pieces are also prepared with the grain running
parallel to the length. This means that for Type T and CP tests the tear will
be parallel to the grain. The membrane is tested as per
Let see the testing video used
for A, B and C:
ASTM D424 on an ADMET universal
testing machine, for more information on the test and equipment visit
http://info.admet.com/specifications/...
Let see the testing video of (Single
Rip Method) E324 used for Type T specimen:
Many thanks to Google.com, ADMET
and etexlab.
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