Citation: T. Beda, J. B. Casimir, K. E. Atcholi, Y. Chevalier. Loaded Rubber-Like Materials Subjected to Small-Amplitude Vibrations[J]. Chinese Journal of Polymer Science, ;2014, 32(5): 620-632. doi: 10.1007/s10118-014-1437-6 shu

Loaded Rubber-Like Materials Subjected to Small-Amplitude Vibrations

Corresponding author: T. Beda, tbeda@yahoo.com
Received Date: 23 July 2013
Revised Date: 5 December 2013

This paper proposes a constitutive law and a method for characterizing highly preloaded viscoelastic materials subjected to linear (small-amplitude) vibrations. A multiplicative non-separable variables law has been suggested to model the behavior that depends on both stretch and time/frequency. This approach allows splitting the intricate combined test performed simultaneously on both stretch and frequency, generally in a limited experimental domain up to 100 Hz, into two independent tests. Thus, on one hand, the dynamic complex modulus dependent on frequency alone is evaluated on the basis of vibration tests in a large experimental domain up to 100 kHz. On the other hand, energetic parameters are determined from a quasi-static hyperelastic tensile test. The complex modulus, dependent on both stretch and frequency, is then deduced from the results acquired from uncoupled investigations. This work shows that, in extension, the elastic modulus increases with increasing stretch, and the loss factor decreases with increasing stretch; while, in compression, around the material undeformed state, the modulus increases as the stretch increases till a certain value of compression stretch (upturn point depending on material characteristics), and then the modulus decreases as the stretch increases. Globally, preload rigidifies materials but reduces their damping property. These results closely match a well-known observation in solid mechanics.
- Elastomers,
- Viscoelasticity,
- Hyperelasticity,
- Vibrations,
- Modeling,
- Characterization,
- Combined modulus
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