Publications (14)
Design and experimental validation of a finite-size labyrinthine metamaterial for vibro-acoustics: enabling upscaling towards large-scale structures
Svenja Hermann, Kévin Billon, Alina-Michelle Parlak +3
In this paper, we present the design and experimental validation of a labyrinthine metamaterial for vibro-acoustic applications. Based on a 2D unit cell, different designs of finit…
Exploring metamaterials' structures through the relaxed micromorphic model: switching an acoustic screen into an acoustic absorber
Gianluca Rizzi, Manuel Collet, Félix Demore +3
While the design of always new metamaterials with exotic static and dynamic properties is attracting deep attention in the last decades, little effort is made to explore their inte…
Innovative Electroacoustic resonator Control enforcing Duffing dynamics at moderate excitation levels: conception and experimental validation
Emanuele De Bono, Maxime Morell, Manuel Collet +3
The electroacoustic resonator is an effcient electro-active device for noise attenuation in enclosed cavities or acoustic waveguides. It is made of a loudspeaker (the actuator) and…
Relaxed micromorphic modeling of the interface between a homogeneous solid and a band-gap metamaterial: new perspectives towards meta-structural design
Angela Madeo, Gabriele Barbagallo, Manuel Collet +3
In the present paper, the material parameters of the isotropic relaxed micromorphic model derived for a specific metamaterial in a previous contribution are used to model its trans…
Experimental Realization of a Reconfigurable Electroacoustic Topological Insulator
Amir Darabi, Manuel Collet, Michael J Leamy
A substantial challenge in guiding elastic waves is the presence of reflection and scattering at sharp edges, defects, and disorders. Recently, mechanical topological insulators ha…
Unveiling the key role of Interfaces in the Design of finite-sized Metamaterial Structures
Svenja Hermann, Kévin Billon, Manuel Collet +1
This paper investigates the influence of interfaces on the performance of finite-sized mechanical metamaterial structures for vibration damping applications. The metamaterial struc…
Modeling real phononic crystals via the weighted relaxed micromorphic model with free and gradient micro-inertia
Angela Madeo, Manuel Collet, Marco Miniaci +3
In this paper the relaxed micromorphic continuum model with weighted free and gradient micro-inertia is used to describe the dynamical behavior of a real two-dimensional phononic c…
Numerical optimization of a prestressed auxetic metamaterial for vibration isolation
Adrien Pyskir, Manuel Collet, Zoran Dimitrijevic +1
We present a numerical study on an enhanced periodic auxetic metamaterial. Rotating squares mechanism allied to precompression induced buckling give these elastic structures exotic…
Experimental Evaluation of the Rheological Properties of Veriflex Shape Memory Polymer
Jan Klesa, Vincent Placet, Emmanuel Foltete +1
Shape memory polymers (SMPs) are materials with a great potential for future use in smart materials and structures. When heated from cold state (below the transformation temperatur…
Analytical and experimental results: creation of a duffing acoustic nonlinear oscillator at low amplitudes
Maxime Morell, Manuel Collet, Emmanuel Gourdon +2
Nonlinear dynamics have long been exploited in order to damp vibrations in solid mechanics. The phenomenon of irreversible energy transfer from a linear primary system to a nonline…
Broadband acoustic isolator in the audible range : nonreciprocal acoustic propagation using programmable boundary conditions
Sami Karkar, Etienne Rivet, Manuel Collet
We propose a novel concept of nonreciprocal devices in acoustics, illustrated by the design of an acoustic diode, or isolator. A boundary control strategy was previously shown to p…
Design and characterization of an instrumented slider aimed atmeasuring local micro-impact forces between dry rough solids
Camille Grégoire, Bernard Laulagnet, Joël Perret Liaudet +3
Sliding motion between two rough solids under light normal loading involves myriad micro-impacts between antagonist micro-asperities. Those micro-impacts are at the origin of many…
Broadband nonreciprocal acoustic propagation using programmable boundary conditions: from analytical modelling to experimental implementation
Sami Karkar, Emanuele De Bono, Manuel Collet +3
In this paper, we theoretically, numerically and experimentally demonstrate the acoustic isolator effect in a 1D waveguide with direction dependent controlled boundary conditions.…
The Advection Boundary Law in absence of mean flow: passivity, nonreciprocity and enhanced noise transmission attenuation
Emanuele De Bono, Manuel Collet, Morvan Ouisse
Sound attenuation along a waveguide is intensively studied for applications ranging from heating and air-conditioning ventilation systems, to aircraft turbofan engines. In particul…