Mohamed Guerich

@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.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@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}

}

@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}

}

@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}

}