Young’s Modulus, Poisson’s Ratio and Loss Factor

What Are the Young’s Modulus, Poisson’s Ratio and Loss Factor?

For isotropic poroelastic materials, the elastic properties to be characterized are Young’s modulus (E), Poisson’s ratio (v) and loss factor (η). The method is based on the dynamic compression of two samples of different shape factors (s1 and s2). This enables the simultaneous characterization of the three elastic properties. The method is valid for frequencies from 20 to 100 Hz.

How to Measure the Young’s Modulus, Poisson’s Ratio and Loss Factor?

Equipment: Quasi-Static Mechanical Analyzer
Standard: ISO 18437-5 (for mechanical setup and dynamic stiffness)
Method: Quasi-static mechanical characterization of poroelastic materials [1]
Parameters:

• E – Young’s modulus (Pa)
• ν – Poisson’s ratio
• η – Damping loss factor

References

[1] C. Langlois, R.Panneton, and N. Atalla, « Polynomial relations for quasi-static mechanical characterization of isotropic poroelastic materials, » J. Acoust. Soc. Am. 110(6), 3032-3040 (2001).

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