Optimized 3-D electromagnetic models of composite materials in microwave frequency range: application to EMC characterization of complex media by statistical means

Lalléchère, S.

doi:10.7716/aem.v6i2.447

Cited by 1 publication

(3 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Equation (19) clearly reflects the difference between the results expected from the set 1 of boundary conditions where only E x is imposed, and those related to the set 2 where only E z is imposed, especially in view of the difference between σ // and σ ⊥ . The heat-source distribution is illustrated in Figure 13 for set 1 and in Figure 14 for set 2 of the boundary conditions for the part with aligned fibres.…”

Section: Thermal Simulationmentioning

confidence: 98%

“…Most developments mainly address spherical inclusions, instead of continuous fiberreinforced composites, by using statistical [19] or deterministic [20] approaches, while other developments rely on the use of homogenized properties to treat continuous fiber composites in commercial software [21] and customized simulations [22].…”

Section: Introductionmentioning

confidence: 99%

“…However, classical methods homogenizing the composite dielectric matrix along with the fiber inclusions fail as soon as the inclusions volume fraction increases. A 10% volume fraction of spherical inclusion led to erroneous results when using classical homogenization [19]. In real composite materials, the fiber volume fraction is often much larger than 10%.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

On the High-Resolution Discretization of the Maxwell Equations in a Composite Tape and the Heating Effects Induced by the Dielectric Losses

2022

View full text Add to dashboard Cite

Electromagnetic field propagation inside composite materials represents a challenge where fiber-scale simulation remains intractable using classical simulation methods. The present work proposes an original 3D simulation with a mesh resolution fine enough to resolve the fiber scale, thanks to the use of Proper Generalized Decomposition (PGD)-based space decomposition, which avoids the necessity of considering homogenized properties and considers the richest description of the involved physics from the solution of the Maxwell equations. This high-resolution simulation enables comparing the electromagnetic field propagation in a composite part, depending on the considered frequency and the fiber’s/wave polarization’s relative orientation. The electromagnetic fields are then post-processed to identify the heat generation terms and- the resulting induced thermal field. The results prove the ability of the PGD-based discretization to attain extremely high levels of resolution, the equivalent of 1010 finite-element degrees of freedom. The obtained results show an enhanced wave penetration when the electric field polarization coincides with the fiber orientation. On the contrary, when the electric field is polarized along the normal to the fiber orientation, both the penetration and the associated heating reduce significantly, compromising the use of homogenized models, rendering them unable to reproduce the observed behaviors.

show abstract

Section: Thermal Simulationmentioning

confidence: 98%