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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=(σ2-σ1)/(ε2-ε1) 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
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 |