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Tensile Properties - ISO 527-1,-2

Tensile testing is performed by elongating a specimen and measuring the load carried by the specimen. From a knowledge of the specimen dimensions, the load and deflection data can be translated into a stress-strain curve. A variety of tensile properties can be extracted from the stress-strain curve.

Tensile Test

Property Definition
Tensile Strain at Break Tensile strain corresponding to the point of rupture.
Nominal Tensile Strain at Break Tensile strain at the tensile stress at break.
Tensile Strain at Yield Tensile strain corresponding to the yield (an increase in strain does not result in an increase in stress).
Tensile Stress at Break Tensile stress corresponding to the point of rupture.
Tensile Stress at 50% Strain Tensile stress recorded at 50% strain.
Tensile Stresss at Yield Tensile stress corresponding to the yield point (an increase in strain does not result in an increase in stress).
Tensile Modulus Often referred to as Young's modulus, or the modulus of elasticity, tensile modulus is the slope of a secant line between 0.05% and 0.25% strain on a stress-strain plot. Tensile modulus is calculated using the formula:
Et=(σ21)/(ε21)
where ε1 is a strain of 0.0005,
ε2 is a strain of 0.0025,
σ1 is the stress at ε1,
and σ2 is the stress at ε2.

Illustration of Tensile Modulus

Test Specimen Summary
Specimen Note Preferred Thickness (mm)
Type 1A Preferred for directly molded multi-purpose test specimens. 4
Type 1B Preferred for machined test specimens. 4
Type 1BA Scaled down version of 1B. All dimensions except thickness scaled by 1.2. >2
Type 1BB Scaled down version of 1B. All dimensions except thickness scaled by 1.5. >2
Type 5A Small specimen. >2
Type 5B Small specimen >1

Type 1A, 1B, 1BA, and 1BB Specimen

Type 5A and 5B Specimen

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