Efficiency of Particle Damping on Lightweight CFRP Structures

Oscar Chesa, Rainer Stelzer, Théophane Courtois, Markus Zogg
2019 SAE Technical Paper Series   unpublished
Carbon fiber reinforced polymers (CFRP) are becoming a common solution to minimize the structural weight in aerospace and automotive applications. The dynamic response of such lightweight structures presents higher acceleration levels than equivalent metallic designs. Hence, damping techniques whose performance depends on accelerations like Particle Damping (PD) have a strong potential to damp them. This paper intends to demonstrate how vibrations on CFRP structures can be efficiently damped
more » ... h PD, resulting in an added weight reduction compared to an equivalent viscoelastic treatment. First, it is analytically put in evidence how the usage of CFRP materials increases the performance of PD on a rectangular clamped plate. This is followed by a parametric study which permitted to improve the performance of the dampers by better understanding their characteristic behavior under vertical excitations. After optimizing the damper design, the paper finishes with an experimental comparison of PD and a viscoelastic constrained-layer treatment on steel and CFRP flat panels, which experimentally shows how the advantage of using PD increases when the CFRP sample is considered. Definitions/Abbreviations CFRP Carbon fiber reinforced polymer PD Particle Damping DEM Discrete Element Method PIM Power Input Method RMS Root mean square
doi:10.4271/2019-01-6000 fatcat:ytwemdz5ynclff3ty2mecn447u