Plastic Strain Ratio (r-value) According ISO 10113, ASTM E517, and JIS Z 2254

To calculate the r-value, a test is performed to ISO 6892 and requires the use of axial and transverse extensometers.

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Plastic Strain Ratio (r-value) According ISO 10113, ASTM E517, and JIS Z 2254

To calculate the r-value, a test is performed to ISO 6892 and requires the use of axial and transverse extensometers.

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To calculate the r-value, a test is performed to ISO 6892 and requires the use of axial and transverse extensometers. Where the behavior of true plastic width strain versus true plastic length strain is homogeneous, a single point calculation can be used. For material that exhibits inhomogeneous deformation, a regression method is recommended, and ISO 10113:2020 strongly recommends measuring transverse strain at multiple locations evenly distributed along the axial gauge length, to be averaged into one value.