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Rubber Engineering - Elastromer Properties |
Elastomer
Properties - Tensile Stress/Strain
Tensile strength is the maximum tensile stress
reached in stretching a test piece (either an O-ring or dumbbell).
Elongation: The strain, or ultimate elongation,
is the amount of stretch at the moment of break.
Modulus: Also called “Mod 100,” this is the
stress required to produce a given elongation. In the case of “Mod 100,” the
modulus would be the stress required to elongate the sample 100%. In elastomers,
the stress is not linear with strain. Therefore the modulus is neither a ratio
nor a constant slope—but rather denotes a point on the stress-strain curve.
Tensile tests are used for controlling product
quality and for determining the effect of chemical or thermal exposure or an
elastomer. In the latter case, it is the retention of these physical properties,
rather than the absolute values of the tensile stress, elongation or modulus,
that is significant.
Test Methods:
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