Community Research and Development Information Service - CORDIS


PARVIS Report Summary

Project ID: G4RD-CT-2001-00495
Funded under: FP5-GROWTH
Country: France

Test results

This result is the experimental determination of the evolution of the viscoelastic parameters of all the materials produced by IQS, ISMANS and JEVSA. The viscoelastic parameters are specific characteristics of the material: the shear modulus G' is linked to the energy stocked by the material (elasticity) and the loss factor is linked to the energy dissipated by the material (heat transfer).

This latter characteristic is the most important for our application as it is directly linked to the attenuation of vibro-acoustic levels. The results of these DMTA tests are the data, which are classically provided to demonstrate the damping performance of a material.

Finally, as these tests were carried out on a large temperature range, it is possible to evaluate the stability of the performances against temperature variations. For the materials developed during PARVIS project, we can see that the damping performances are high but the temperature range of stability is not as large as expected.

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