I am investigating the the Youngs modulus and Poissons ratio of a CAC silicone hose (Armid fabric embedded). Is there any test to determine the Poissons ratio experimentally, I am conducting a tensile test for determining the Youngs modulus according to ASTM 412 standard. We dont have any strain guages that are associated with the UTM for determining Poisson ratio. Is there a way to find the shear modulus and reverse calculate the Poisson ratio with the known Youngs modulus? If yes, how the test bench will look like. Just for the information, the hose material is a composite and i cannot mould it to a new form as desired.
In the best of my knowledge you need a measurement of the materials deformations (strain) in loading direction and cross-loading direction.
It's an anisotropic material, it's not that simple.
If you compress the cylinder along the axis, you need to try to measure the axial and circumferential deformation.
You can squeeze the cylinder across and measure the shape of the cross section. Next, use approximate formulas for a cylinder made of a linear elastic material.
But this material can also be non-linearly elastic.
There's such a concept as "elastic constitutive relation's constant (modulus) for the material", but there's no "elastic constant for the construction". And yep, two constants are for homogeneous isotropic momentless continual models of materials only, and composite materials are not isotropic nor homogeneous. As for converting between various isotropic constants, Wikipedia has the nice table https://en.wikipedia.org/wiki/Elastic_modulus
Thank you all for the information, Mr. Vadique I appeciate a lot that really helps.
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