ISMA edition:26 location:Leuven date:15-17 September 2014
The effect of the damping addition due to viscoelastic (VE) material on the dynamic behavior of aluminum panels is assessed in this work. Dynamic Mechanical Analysis (DMA) tests are carried out, aiming at characterizing the rheological behavior of the VE compound. The Time-Temperature Superposition Principle (TTSP) is applied and the compound master curve is built over a large frequency range. As a result, the parameters for both, Generalized Maxwell Model (GMM) and Fractional Derivative Model (FDM) are determined. Distributed and local coatings of the VE material are applied to aluminum plates and the responses of these sandwich structures are calculated by using finite elements method where the VE behavior is modeled either with a GMM or a FDM. As a second step, tests are done by reproducing the same modeled configurations with the testing facilities of KULeuven. Numerical vs. experimental Frequency Response Functions (FRF) comparisons are done in order to validate the models.