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Tensile Strength (TS)
Tensile strength is the maximum stress an object can withstand while being pulled before breaking. The maximum stress that thermoplastic elastomers and vulcanized thermoset rubbers can withstand before breaking, is the ultimate tensile strength (UTS).
Importance
Tensile tests are conducted for determining product quality and the effect of thermal or chemical exposure on an elastomer. Note that it is the retention of the elastomer’s properties that are important, rather than absolute values of elongation, modulus, and the tensile strength.
The testing requires taking a sample with a fixed cross-section and then stretching it at a constant strain rate with a tensometer, until the sample snaps.
Types of Tensile Strength
1) Yield Strength – The stress an object can withstand without leading to permanent deformation.
2) Ultimate Strength – The highest stress an object can withstand.
3) Breaking Strength – The stress coordinate on the stress-strain curve during the breaking point.
Test Methods
The TS of a rubber sample can be determined using one of two testing methods. Note that the test results are not always identical.
1) Test Method A
Straight Section Specimens and Dumbbell – The specimens are either injection molded or taken from a flat sheet that is not more than 0.13 inches nor less than 0.05 inches.
2) Test Method B
Cut Ring Specimens – The specimens are created by cutting rings from tubing or sheets. The dimensions are stated by the ASTM specifications.
Calculating Tensile Strength
Calculating TS for a rubber sample can be accomplished using:
TS = F(BE)/A)
Where,
TS – Tensile strength (stress at breaking point)
F(BE) – Force magnitude at breaking point
A – The cross-sectional area of the unstretched sample
Tensile Strength (TS)
Tensile strength is the maximum stress an object can withstand while being pulled before breaking. The maximum stress that thermoplastic elastomers and vulcanized thermoset rubbers can withstand before breaking, is the ultimate tensile strength (UTS).
Importance
Tensile tests are conducted for determining product quality and the effect of thermal or chemical exposure on an elastomer. Note that it is the retention of the elastomer’s properties that are important, rather than absolute values of elongation, modulus, and the tensile strength.
The testing requires taking a sample with a fixed cross-section and then stretching it at a constant strain rate with a tensometer, until the sample snaps.
Types of Tensile Strength
1) Yield Strength – The stress an object can withstand without leading to permanent deformation.
2) Ultimate Strength – The highest stress an object can withstand.
3) Breaking Strength – The stress coordinate on the stress-strain curve during the breaking point.
Test Methods
The TS of a rubber sample can be determined using one of two testing methods. Note that the test results are not always identical.
1) Test Method A
Straight Section Specimens and Dumbbell – The specimens are either injection molded or taken from a flat sheet that is not more than 0.13 inches nor less than 0.05 inches.
2) Test Method B
Cut Ring Specimens – The specimens are created by cutting rings from tubing or sheets. The dimensions are stated by the ASTM specifications.
Calculating Tensile Strength
Calculating TS for a rubber sample can be accomplished using:
TS = F(BE)/A)
Where,
TS – Tensile strength (stress at breaking point)
F(BE) – Force magnitude at breaking point
A – The cross-sectional area of the unstretched sample
NEED HELP?
Speak with a human to filling out a form? call corporate office and we will connect you with a team member who can help.
