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Poissonís Ratio

ASTM D 638, ISO 527

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When uniaxial force is applied, the specimen will deform not only in the direction of the force (axial) but also laterally (transverse). Poissonís Ratio is a measure of transverse strain against axial strain when uniaxial stress is applied.

Test Procedure:
The specimen is clamped into the grips of the Instron universal tester. Two strain measuring devices are attached to the specimen, one axial and one transverse. A uniaxial force is applied at a predetermined speed.

Specimen size:
A standard tensile bar can be used.

A stress-strain graph is produced and Poissonís ratio is calculated.

Equipment Used:
Instron Universal Tester

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**Please note that this test description is intentionally generic in nature and aimed at providing a descriptive summary to enhance test understanding. For more information please contact a Intertek PTL Technical Representative at . Due to copyright restrictions, we are not able to provide copies of standards. Standards can be obtained from appropriate standards authorities.

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