Mohamed Guerich

@article{Benjeddou2019,

title = {Free vibration of actual aircraft and spacecraft hexagonal honeycomb sandwich panels: A practical detailed FE approach},

author = {Ayech Benjeddou and Mohamed Guerich},

url = {http://www.techno-press.org/?journal=aas&subpage=7},

doi = {DOI: https://doi.org/10.12989/aas.2019.6.2.169},

issn = {ISSN: 2287-528X (Print), 2287-5271 (Online)},

year  = {2019},

date = {2019-03-06},

journal = {Advances in Aircraft and Spacecraft Science},

volume = {6},

number = {2},

pages = {169-187},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{NME:NME5200,

title = {A multi-scale modeling method for heterogeneous structures without scale separation using a filter-based homogenization scheme},

author = {Tognevi Amen and Guerich Mohamed and Yvonnet Julien},

url = {http://dx.doi.org/10.1002/nme.5200},

doi = {10.1002/nme.5200},

issn = {1097-0207},

year  = {2016},

date = {2016-01-01},

journal = {International Journal for Numerical Methods in Engineering},

pages = {n/a--n/a},

abstract = {A method is proposed to compute the response of highly heterogeneous structures by constructing homogenized models when no scale separation can be assumed. The technique is based on an extended homogenization scheme where the averaging operators are replaced by linear filters to cut off fine scale fluctuations, while maintaining locally varying mechanical fields with larger wavelength. As a result, the constitutive law at an intermediate scale, called mesoscale, arises to be naturally nonlocal by construction, where the kernel operator is fully constructed by computations on the unit cell associated with the microstructure. A displacement-based numerical strategy is developed to implement the technique in a classical finite element framework and does not require higher-order elements. The methodology is applied to construct simplified models of heterogeneous structures subjected to loads, which have a characteristic wavelength comparable with the dimensions of the heterogeneities or in presence of strong strain localization as in cracked heterogeneous structures. Copyright © 2016 John Wiley & Sons, Ltd.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{doi:10.1061/(ASCE)EM.1943-7889.0001057,

title = {Determining the Size of RVE for Nonlinear Random Composites in an Incremental Computational Homogenization Framework},

author = {Trung Hieu Hoang and Mohamed Guerich and Julien Yvonnet},

url = {http://dx.doi.org/10.1061/(ASCE)EM.1943-7889.0001057},

doi = {10.1061/(ASCE)EM.1943-7889.0001057},

year  = {2016},

date = {2016-01-01},

journal = {Journal of Engineering Mechanics},

volume = {142},

number = {5},

pages = {04016018},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{GUERICH2013,

title = {Optimization of Noise Transmission through Damped Sandwich Structures},

author = { Mohamed Guerich and Samir Assaf},

url = {http://www.researchgate.net/publication/262456008_Optimization_of_Noise_Transmission_through_Damped_Sandwich_Structures},

year  = {2013},

date = {2013-10-01},

journal = {Journal of Vibration and Acoustics},

volume = {135},

number = {5},

pages = {1-13},

abstract = {An optimization methodology to increase the noise transmission loss (TL) of damped sandwich structures is presented. The prediction of the TL uses a numerical tool based on a finite element formulation for the sandwich plate coupled to a boundary element method for the acoustic medium. This tool can be used for arbitrarily shaped three-layer sandwich plates with various boundary conditions and it is well adapted to parametric and optimization studies. First, a parametric study was conducted to choose the objective function, the constraints, and the pertinent design variables to use in the optimization problem which consist in reducing the sound power transmitted by a viscoelastically damped sandwich plate. Next, by constraining the acoustical behavior of the sandwich panel, the surface mass of the sandwich structure was minimized. It is shown that a significant reduction in the transmitted sound power can be achieved by selecting the appropriate geometric configuration and damping layer material.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{ASSAF2011,

title = {Vibration and Damping Analysis of Plates with Partially Covered damping Layers},

author = { Samir Assaf and Mohamed Guerich and Philippe Cuvelier},

editor = {S. Hirzel Verlag},

url = {http://dx.doi.org/10.3813/AAA.918436},

year  = {2011},

date = {2011-07-01},

journal = {Acta Acustica United with Acustica},

volume = {97},

pages = {553-568},

abstract = {The constrained-layer damping treatment is widely used to control the resonant response of vibrating structures, particularly in the automotive and aerospace industries. This technique requires design tools in order to select the best location, type and thickness of the damping and constraining-layer materials for optimum damping while minimizing the total weight of the damping treatments. In this study, a numerical tool is presented to analyze the vibration response of plates partially or fully covered with a constrained viscoelastic damping material. This tool is based on a finite element approach. The undamped plate structure is modeled using a discrete Kirchhoff theory (DKT) element. However, a sandwich plate element is specially derived to model the damped plate structure. This element is formulated in such a way that it is compatible with the DKT element. The natural frequencies and modal loss factors are derived from the modal strain energy method. The proposed approach is validated by comparing predictions with the results of various examples published in the literature. Hence, this approach is shown to predict accurately the damping characteristics of arbitrarily shaped sandwich plates, with different material properties and boundary conditions, fully or partially covered with constrained viscoelastic layers. The influence of the damping patch locations and the viscoelastic material's shear modulus on the vibration and damping characteristics is investigated. To damp the plate effectively using partial coverage, the damping patches must be distributed appropriately. To select the best damping patch locations, an indicator based on the energy dissipated through the viscoelastic layer is proposed.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{ASSAF2010,

title = {Vibration and Acoustic Response of Damped Sandwich Plates Immersed in a light or heavy fluid},

author = { Samir Assaf and Mohamed Guerich and Philippe Cuvelier},

url = {http://www.sciencedirect.com/science/article/pii/S0045794910000805},

year  = {2010},

date = {2010-07-01},

journal = {Computers and Structures},

volume = {88},

pages = {870-878},

abstract = {This paper presents a finite element formulation to analyze the vibro-acoustic response of plates with constrained-layer damping treatment. This formulation takes into account the effects of fluid loading. The governing coupled structural/acoustic equations of motion are solved using a modal approach combined with an interpolation technique of the reduced radiation impedance matrix components of the fluid. The numerical results show the accuracy of the proposed approach. In addition, a parametric study is carried out to highlight the influence of geometrical and material variables on the damping characteristics, which could be used as design parameters for the optimization problem.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{ASSAF2008,

title = {Numerical Prediction of Noise Transmission Loss Through Viscoelastically Sandwich panels},

author = { Samir Assaf and Mohamed Guerich},

url = {http://jsm.sagepub.com/content/10/5/359.refs},

year  = {2008},

date = {2008-09-01},

journal = {Journal of Sandwich Structures & Materials},

volume = {10},

number = {5},

pages = {359-384},

abstract = {This study describes the numerical prediction of noise transmission loss (TL) through sandwich plates subjected to an acoustic plane wave or a diffuse sound field excitation. The sandwich plate considered is made up of a viscoelastic core sandwiched between two elastic faces. The model presented is based on a finite element formulation for the sandwich plate coupled to a boundary element method for the acoustic medium. The plate formulation is derived from Kirchhoff's theory for the elastic faces and Mindlin's theory for the core. The strain and kinetic energies of the sandwich plates are written in terms of the mean and relative in-plane displacements of the faces and the transverse deflection of the plate. The diffuse sound field is modeled as a superposition of uncorrelated plane waves with equal amplitude. The vibroacoustic equations obtained are discretized using a triangular finite element. The accuracy of the present model is demonstrated by comparing it with analytical and experimental results available in the literature. New results on laminated glass showing the effects of temperature on the TL are presented.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{TROMPETTE2004,

title = {An Experimental Validation of a Vibro-Acoustic simplified prediction by the use of simplified methods},

author = { Nicolas Trompette and Mohamed Guerich},

url = {http://www.sciencedirect.com/science/article/pii/S0003682X04001434},

year  = {2004},

date = {2004-09-01},

journal = {Applied Acoustics},

volume = {66},

pages = {427-445},

abstract = {Predicting the vibro-acoustic behaviour of a structure is usually done by using the well established finite element (FE) method and boundary element method. This paper presents a vibro-acoustic prediction case performed on a metal box using less accurate but simplified methods: sub-structuring for the calculation of the dynamic response of the structure, and a monopole distribution for the radiated noise calculation. Both are less accurate but faster methods than previous ones. An experimental validation was performed. It led to the conclusion that these methods give precise results and are sufficient for the pre-design of structures in the low frequency domain. However, this conclusion must be moderated by the fact that in spite of the simplicity of the structure, the FE model had to be adjusted to the experiments to yield to a result close to the experiments.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{M.GUERICH1999,

title = {A Numerical Method for Vibro-Acoustic Problems with Incompatible Finite Element Meshes Using B-Spline Functions},

author = { Mohamed Guerich and Mohamed-Ali Hamdi},

year  = {1999},

date = {1999-03-01},

journal = {Journal of Acoustical Society of America},

volume = {105},

number = {3},

pages = {1682-1694},

keywords = {},

pubstate = {published},

tppubtype = {article}

}