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Tuesday, July 9 • 10:50 - 11:10
ON THE USE OF 3D PRINTED ARCHITECTED CORE IN SANDWICH STRUCTURE FOR VIBRATION CONTROL

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Vibrations can cause several damages in industrial applications, heavy machinery, vehicles, equip-ment, and tools. In order to dissipate energy in vibrating structures, damping systems are designedfor given frequency ranges. Vibration-reducing materials (such as viscoelastic films) outwardly dis-perse energy, thereby reducing the amplitude and frequency of the vibrational waves. High dampingperformance is required as well as low weight and costs. In order to design these damping treatmentsfor actual problems, one should evaluate the mechanical properties of the viscoelastic material andsimulate the structural behavior by means of numerical model. In this paper, the use of architected3D printed materials as sandwich core with different mechanical properties depending on the print-ing geometry size is discussed. The studied structure is a clamped-free sandwich beam integrating a3D printed PLA core with interesting damping capacities. The core structure is inspired by Voronoïcell form (having different sizes), where the absence of regularity affords a simple way to reduce thebulky material while varying the desired mechanical (stiffness and density) and dynamical properties.Initially, the dynamical properties are measured and, subsequently, the dissipative characteristics ofthis passive materials are evaluated. The results indicate that increasing the Voronoï cell size has acrucial consequence on the mechanical properties of the PLA material. A FEM model is proposed forhighlighting the mechanical behavior of the sandwich beam, which was compared to a honeycombcore sandwich. The promising results suggest a real potential of these architected material to be agood substitute for other classical and periodic geometries.

Moderators
avatar for Mohammad Rafiee

Mohammad Rafiee

Postdoctoral Fellow, Polytechnique Montréal
Mohammad Rafiee received his Ph.D. degree in Mechanical Engineering from the University of Ottawa in 2018. Currently, he is a Postdoctoral Fellow at Polytechnique Montreal in Canada. His research interests are primarily focused on the development of advanced composite materials, smart... Read More →

Authors
MA

Mohamed Amin BEN LASSOUED

PhD, Ecole Polytechnique de Montréal - ISAE-SUPAERO
AR

Annie Ross

Professor, Polytechnique Montreal


Tuesday July 9, 2019 10:50 - 11:10 EDT
Outremont 6
  T08 Mat. for noise & vibr. cntrl., SS02 Vibr damping materials