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Poisson's Ratio Measurement of Metal Bars

Poisson's ratio measurementVideo extensometer

In metal bar Poisson's ratio testing, transverse strain amplitudes are low in the small-deformation stage, limiting the accuracy of conventional extensometers.The Haytham video extensometerNon-contact extraction of axial and transverse strains stably outputs the Poisson's ratio evolution curve, improving material constitutive modeling and simulation accuracy.

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