Hanen Jrad
École Normale Supérieure
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Publication
Featured researches published by Hanen Jrad.
International Journal of Applied Mechanics | 2013
Hanen Jrad; Franck Renaud; Jean Luc Dion; Imad Tawfiq; Mohamed Haddar
Viscoelastic joints connecting solids are essential components of mechanical systems. Viscoelastic components have inherent damping in their structure. Moreover, energy losses in structural vibrations are strongly linked to the friction properties of joints. In this work, a new visco-tribological model was developed by coupling the rheological linear generalized Maxwell model and Dahl friction model. A method for parametric identification is proposed. Parameters of the model are identified from dynamic mechanical analysis (DMA) tests for different excitation frequencies. Comparison between measurements and simulations is performed and the validity of the proposed model is discussed.
ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference | 2012
Hanen Jrad; Jean Luc Dion; Franck Renaud; Imad Tawfiq; Mohamed Haddar
Viscoelastic components are incorporated into automobile and aerospace structures system in order to damp mechanical vibrations. Viscoelastic components are a key element in designing desired dynamic behaviour of mechanical systems. Viscoelastic components dynamic characteristics are often very complex, due to the dependence of its response on several variables, such as frequency, amplitude, preload, and temperature. These dependencies can be critical in capturing the mechanical proprieties and so non linear dynamical behaviour may appear. Assuming that non linearities are due to non linear elasticity, the non linear Generalized Maxwell Model (GMM) is proposed to characterize dynamics of viscoelastic components. Parameters of GMM are identified from Dynamic Mechanical Analysis (DMA) tests for different excitation frequencies. A particular result from identification is that the non linear stiffness is dependent upon displacement amplitude and static displacement under static preload. The significance of this result is that the non linear dynamics of the viscoelastic component can be represented by a simple analytical model capable to produce accurate results. Comparison between measurements and simulations of dynamic stiffness of viscoelastic component has been carried on.Copyright
Archive | 2014
Hanen Jrad; Jean Luc Dion; Franck Renaud; Imad Tawfiq; Mohamed Haddar
Characterizing frictional behavior of viscoelastic joints is investigated in the present work. A new visco-tribological model was developed by coupling the rheological Generalized Maxwell model (GMM) and Dahl friction model. Parameters of the proposed model are identified from Dynamic Mechanical Analysis (DMA) tests for different excitation frequencies. Comparison between measurements and simulations of hysteretic friction of the viscoelastic component has been carried on.
Noise & Vibration Worldwide | 2012
Mohamed Taktak; Hanen Jrad; Chafik Karra; Mabrouk Bentahar; Mohamed Haddar
The flow presents an important factor influencing the acoustic propagation inside a duct element. In this paper, a three dimensional numerical method based on the convected Helmholtz equation was used to evaluate this effect in the case of cylindrical wall - lined - wall duct element by simulating the acoustic field inside a duct element presenting an impedance discontinuity. The flow effect was evaluated for several modes and Mach numbers. A comparison between acoustic fields inside the duct for several studied cases showed that the direction and the amplitude of the flow may affect on the attenuation of the acoustic pressure inside lined ducts.
European Journal of Mechanics A-solids | 2013
Hanen Jrad; Jean Luc Dion; Franck Renaud; Imad Tawfiq; Mohamed Haddar
Acta Acustica United With Acustica | 2011
Mohamed Taktak; Hanen Jrad; Chafik Karra; Mabrouk Bentahar; Mohamed Haddar
Mechanics of Time-dependent Materials | 2017
Hanen Jrad; Jean Luc Dion; Franck Renaud; Imad Tawfiq; Mohamed Haddar
International Journal of Adhesion and Adhesives | 2018
Rawdha Kessentini; Olga Klinkova; Hanen Jrad; Imad Tawfiq; Mohamed Haddar
Journal of Theoretical and Applied Mechanics | 2017
Nouha Kammoun; Hanen Jrad; Slim Bouaziz; Mohamed Soula; Mohamed Haddar
22ème Congrès Français de Mécanique, 24 au 28 août 2015, Lyon, France (FR) | 2015
Jean-Luc Dion; Hanen Jrad; Franck Renaud; Imad Tawfiq