Experiments, numerical models and optimization of carbon-epoxy plates damped by a frequency-dependent interleaved viscoelastic layer

The research work presented in this paper aims to optimize the dynamic response of a carbon-epoxy plate by including into laminate one frequency-dependent interleaved viscoelastic layer. To keep an acceptable bending stiffness, some holes are created layer, thus facilitating resin through layer penetration during co-curing manufacturing process. Plates (or not) perforated non-perforated) manufactured and investigated experimentally numerically. First, static tests performed on sandwich coupons characterize stiffness damping properties plates given frequency range. Resulting mechanical then used set-up finite element model simulate response. In parallel, measurements carried out plates, successfully confronted numerical results. Finally, design experiments is built based limited number simulations find configuration bridges that maximizes while keeping higher than half equivalent undamped plate.