Ayech Benjeddou; Mohamed Guerich
Free vibration of actual aircraft and spacecraft hexagonal honeycomb sandwich panels: A practical detailed FE approach Journal Article
In: Advances in Aircraft and Spacecraft Science, vol. 6, no. 2, pp. 169-187, 2019.
@article{benjeddou_892,
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://koreascience.or.kr/article/JAKO201913457808231.page},
year = {2019},
date = {2019-03-01},
journal = {Advances in Aircraft and Spacecraft Science},
volume = {6},
number = {2},
pages = {169-187},
abstract = {This work presents a practical detailed finite element (FE) approach for the three dimensional (3D) free vibration analysis of actual aircraft and spacecraft type lightweight and thin honeycomb sandwich panels. It consists of calling successively in MATLAB®, via a developed user friendly GUI, a detailed 3D meshing tool, a macro commands language translator and a commercial FE solver (ABAQUS® or ANSYS®). In contrary to the common practice of meshing finely the faces and core cells, the proposed meshing tool represents each wall of the actual hexagonal core cells as a single two dimensional (2D) 4 nodes quadrangular shell element or two 3 nodes triangular ones, while the faces meshes are obtained simply using the nodes at the core faces interfaces. Moreover, as the same 2D FE interpolation type is used for meshing the core and faces, this leads to an automatic handling of their required FE compatibility relations. This proposed approach is applied to a sample made of very thin glass fiber reinforced polymer woven composite faces and a thin aluminum alloy hexagonal honeycomb core. The unknown or incomplete geometric and materials properties are first collected through direct measurements, reverse engineering techniques and experimental FE modal analysis based inverse identification. Then, the free vibrations of the actual honeycomb sandwich panel are analyzed experimentally under different boundary conditions and numerically using different mesh basic cell shapes. It is found that this approach is accurate for the first few modes used for pre design purpose.},
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tppubtype = {article}
}
Amen Tognevi; Mohamed Guerich; Julien Yvonnet
A multi-scale modeling method for heterogeneous structures without scale separation using a filter-based homogenization scheme Journal Article
In: International Journal For Numerical Methods In Engineering, vol. 108, no. 1, pp. mars-25, 2016.
@article{tognevi_77,
title = {A multi-scale modeling method for heterogeneous structures without scale separation using a filter-based homogenization scheme},
author = {Amen Tognevi and Mohamed Guerich and Julien Yvonnet},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/nme.5200},
year = {2016},
date = {2016-10-01},
journal = {International Journal For Numerical Methods In Engineering},
volume = {108},
number = {1},
pages = {mars-25},
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.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Trung Hieu Hoang; Mohamed Guerich; Julien Yvonnet
Determining the Size of RVE for Nonlinear Random Composites in an Incremental Computational Homogenization Framework Journal Article
In: Journal Of Engineering Mechanics, vol. 142, no. 5, pp. 4016018.1 -4016018.11, 2016.
@article{hoang_51,
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 = {https://ascelibrary.org/doi/10.1061/%28ASCE%29EM.1943-7889.0001057},
year = {2016},
date = {2016-05-01},
journal = {Journal Of Engineering Mechanics},
volume = {142},
number = {5},
pages = {4016018.1 -4016018.11},
abstract = {In this paper, the authors address the issue of determining the size of a representative volume element (RVE) in the case of nonlinear random composites with either elastoplastic or elasto-viscoplastic phases. In such a case, the general form of the effective constitutive behavior is not known in advance and the response must be evaluated either by direct numerical computations on the RVE or by an appropriate approximation scheme.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Mohamed Guerich; Samir Assaf
Optimization of Noise Transmission Through Sandwich Structures Journal Article
In: Journal Of Vibration And Acoustics-Transactions Of The Asme, vol. 135, no. 5, pp. 051010, 2013.
@article{guerich_2374,
title = {Optimization of Noise Transmission Through Sandwich Structures},
author = {Mohamed Guerich and Samir Assaf},
url = {https://asmedigitalcollection.asme.org/vibrationacoustics/article-abstract/135/5/051010/380063/Optimization-of-Noise-Transmission-Through?redirectedFrom=fulltext},
year = {2013},
date = {2013-10-01},
journal = {Journal Of Vibration And Acoustics-Transactions Of The Asme},
volume = {135},
number = {5},
pages = {051010},
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}
}
Samir Assaf; Mohamed Guerich; Philippe Cuvelier
Vibration and damping analysis of plates with partially covered damping layers Journal Article
In: Acta Acustica, vol. 97, pp. 553 - 568, 2011.
@article{assaf_2375,
title = {Vibration and damping analysis of plates with partially covered damping layers},
author = {Samir Assaf and Mohamed Guerich and Philippe Cuvelier},
url = {https://acta-acustica.edpsciences.org/},
year = {2011},
date = {2011-03-01},
journal = {Acta 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}
}
Nicolas Trompette; Mohamed Guerich
An experimental validation of a vibro-acoustic simplified prediction by the use of simplified methods Journal Article
In: Applied Acoustics, vol. 66, pp. 427- 445., 2005.
@article{trompette_1396,
title = {An experimental validation of a vibro-acoustic simplified prediction by the use of simplified methods},
author = {Nicolas Trompette and Mohamed Guerich},
url = {https://www.sciencedirect.com/science/article/abs/pii/S0003682X04001434},
year = {2005},
date = {2005-01-01},
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}
}
Ayech Benjeddou; Mohamed Guerich
5th Tunisian Congress of Mechanics CoTuMe'2020, Hammaet, Tunisia, 2021.
@conference{benjeddou_1355,
title = {On three-dimensional detailed finite element free-vibration analysis of hexagonal honeycomb sandwich panels},
author = {Ayech Benjeddou and Mohamed Guerich},
url = {http://www.cotume.com/en/},
year = {2021},
date = {2021-03-01},
booktitle = {5th Tunisian Congress of Mechanics CoTuMe'2020},
address = {Hammaet, Tunisia},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Julien Yvonnet; Amen Tognevi; G. Bonnet; Mohamed Guerich
A filter-based computational homogenization method for handling non-separated scales problems Conference
12e Colloque National en Calcul des Structures, Presqu'île de Giens, France, 2015.
@conference{yvonnet_398,
title = {A filter-based computational homogenization method for handling non-separated scales problems},
author = {Julien Yvonnet and Amen Tognevi and G. Bonnet and Mohamed Guerich},
url = {https://csma2015.ec-nantes.fr/session25.html},
year = {2015},
date = {2015-05-01},
booktitle = {12e Colloque National en Calcul des Structures},
address = {Presqu'île de Giens, France},
keywords = {},
pubstate = {published},
tppubtype = {conference}
}
Slim Ben Eleuchi; Seddik Shiri; Mohamed Guerich
Sensibilité des coefficients de frottement et des lois d'extrapolations sur la prédiction du retour élastique pour l'acier HSLA420 Proceedings Article
In: Proceeding of the Tunisian Congress of Mechanics, Monastir, Tunisia, 2023.
@inproceedings{ben_eleuchi_2373,
title = {Sensibilité des coefficients de frottement et des lois d'extrapolations sur la prédiction du retour élastique pour l'acier HSLA420},
author = {Slim Ben Eleuchi and Seddik Shiri and Mohamed Guerich},
url = {https://www.cotume.tn/proceeding/},
year = {2023},
date = {2023-03-01},
booktitle = {Proceeding of the Tunisian Congress of Mechanics},
address = {Monastir, Tunisia},
abstract = {L'analyse par éléments finis est largement utilisée pour la prédiction du retour élastique, mais la précision dépend fortement des paramètres numériques et physiques. Parmi les paramètres qui affectent la prédiction, on peut citer : le coefficient de frottement, les lois de comportement, la fonction de charge... Dans ce papier, la sensibilité des coefficients de frottement et l'influence d'extrapolation des lois sur la prédiction du retour élastique sont étudiées et analysées. Comme application, nous utilisons un exemple industriel du procédé d'emboutissage : le bavolet d'automobile avec le matériau HSLA420. Toutes les simulations numériques sont effectuées avec le code commercial Pam-stamp 2G.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
Mohamed Guerich; Samir Assaf
Damping optimal design of sandwich beams partially covered with damping patches Proceedings Article
In: Proceedings of ISMA2022 including USD2022, Leuven, belgium, 2022, ISBN: 978-90-828931-5-1.
@inproceedings{guerich_2372,
title = {Damping optimal design of sandwich beams partially covered with damping patches},
author = {Mohamed Guerich and Samir Assaf},
url = {https://www.isma-isaac.be/isma2022},
issn = {978-90-828931-5-1},
year = {2022},
date = {2022-09-01},
booktitle = {Proceedings of ISMA2022 including USD2022},
address = {Leuven, belgium},
abstract = {The application of viscoelastic materials in the form of constrained layers in mechanical structures is an
efficient and cost-effective technique for solving noise and vibration problems. This technique requires
design tool to select the best location, type and thickness of the damping treatment. This paper presents a
finite element model for the vibration of beams partially or fully covered with a constrained viscoelastic
damping material. The model is based on Bernoulli-Euler theory for the faces and Timoshenko beam theory
for the core. The sandwich beam finite element is compatible with the conventional C1 finite element for
homogenous beams. To validate the proposed model, several free vibration analyses of fully or partially
covered beams, with different locations of the damping patches and different percent coverage are studied.
The results show that the proposed approach can be used as an effective tool to study the influence of the
location and treatment size on the natural frequencies and the associated modal loss factors.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
Trung Hieu Hoang; Mohamed Guerich; Julien Yvonnet
A Numerical Incremental Homogenization Approach to Calculate Elastoplastic Heterogeneous Structures Proceedings Article
In: Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering, Heraklion, Greece, 2016, ISBN: ISBN: 978-618-82844-0-1.
@inproceedings{hoang_99,
title = {A Numerical Incremental Homogenization Approach to Calculate Elastoplastic Heterogeneous Structures},
author = {Trung Hieu Hoang and Mohamed Guerich and Julien Yvonnet},
url = {https://www.eccomas2016.org/},
issn = {ISBN: 978-618-82844-0-1},
year = {2016},
date = {2016-06-01},
booktitle = {Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering},
address = {Heraklion, Greece},
keywords = {},
pubstate = {published},
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Amen Tognevi; Mohamed Guerich; Julien Yvonnet
A multi-scale modeling method for heterogeneous structures without scale separation using a filterbased homogenization scheme Proceedings Article
In: Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering, Heraklion, Greece, 2016.
@inproceedings{tognevi_291,
title = {A multi-scale modeling method for heterogeneous structures without scale separation using a filterbased homogenization scheme},
author = {Amen Tognevi and Mohamed Guerich and Julien Yvonnet},
url = {https://www.eccomas2016.org/},
year = {2016},
date = {2016-06-01},
booktitle = {Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering},
address = {Heraklion, Greece},
keywords = {},
pubstate = {published},
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Trung Hieu Hoang; Mohamed Guerich; Julien Yvonnet
Effective size of RVE for finite element analysis of structures made of nonlinear random composites Proceedings Article
In: Proceeding of 18th International Conference on Composite Structures (ICCS18),, pp. 9090, Lisbon, Portugal, 2015.
@inproceedings{hoang_400,
title = {Effective size of RVE for finite element analysis of structures made of nonlinear random composites},
author = {Trung Hieu Hoang and Mohamed Guerich and Julien Yvonnet},
url = {http://conference.mercatura.pt/gestao4/index.php?pagina=1367},
year = {2015},
date = {2015-06-01},
booktitle = {Proceeding of 18th International Conference on Composite Structures (ICCS18),},
volume = {18. Multiscale analysis},
pages = {9090},
address = {Lisbon, Portugal},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
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Mohamed Guerich; Trung Hieu Hoang; Julien Yvonnet
An incremental multilevel computational homogenization method for elastoplastic composites Proceedings Article
In: Proceeding of 18th International Conference on Composite Structures (ICCS18),, pp. 9088, Lisbon, Portugal, 2015.
@inproceedings{guerich_401,
title = {An incremental multilevel computational homogenization method for elastoplastic composites},
author = {Mohamed Guerich and Trung Hieu Hoang and Julien Yvonnet},
url = {http://conference.mercatura.pt/gestao4/index.php?pagina=1367},
year = {2015},
date = {2015-06-01},
booktitle = {Proceeding of 18th International Conference on Composite Structures (ICCS18),},
volume = {16. Numerical methods},
pages = {9088},
address = {Lisbon, Portugal},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
Mohamed Guerich; Julien Yvonnet; G. Bonnet; Amen Tognevi
Filter-based computational homogenization Proceedings Article
In: Proceedings of the 1st Pan-American Congress on Computational Mechanic, Buenos Aires, Argentina, 2015, ISBN: ISBN: 978-84-943928-2-5.
@inproceedings{guerich_399,
title = {Filter-based computational homogenization},
author = {Mohamed Guerich and Julien Yvonnet and G. Bonnet and Amen Tognevi},
url = {http://congress.cimne.com/panacm2015/frontal/default.asp},
issn = {ISBN: 978-84-943928-2-5},
year = {2015},
date = {2015-04-01},
booktitle = {Proceedings of the 1st Pan-American Congress on Computational Mechanic},
address = {Buenos Aires, Argentina},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
Mohamed Guerich
Modélisation vibro-acoustique des structures (réductions, amortissements, optimisations) & homogénéisation des matériaux composites PhD Thesis
UTC, 2019.
@phdthesis{guerich_903,
title = {Modélisation vibro-acoustique des structures (réductions, amortissements, optimisations) & homogénéisation des matériaux composites},
author = {Mohamed Guerich},
year = {2019},
date = {2019-07-01},
address = {Troyes, France},
school = {UTC},
keywords = {},
pubstate = {published},
tppubtype = {phdthesis}
}
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