Homogenization methods for electromagnetic modeling of composite materials. Application to shielding enclosures of electronic devices
type: Dataset
description: The number of electronic devices and wireless communication systems has significantly increased over the past 20 years. Shielding enclosures used to protect electronic devices against radiated waves and to limit their emissions are usually designed in aluminum alloys. But the need to reduce the weight of aircraft incites the aerospace industry to the use of composite materials.Modeling shielding enclosures composed of homogeneous materials is possible by the use of numerical tools such as the finite element method. But considering every details of the microstructure would involve a excessive number of unknowns preventing numerical modelings. The use of semi-analytical homogenization methods is a possibility to overcome this restriction. The equivalent homogeneous mediums obtained with these methods can be inserted into numerical tools to simulate the electromagnetic behavior of complex shielding enclosures. But classical homogenization models such as Maxwell-Garnett model, are limited to quasi-static applications.Calculating the effective properties of composite materials illuminated by electromagnetic waves is the main objective of this work. This leads to two dynamic homogenization methods. The first one introduces a size effect between the fibers and the wavelength. It allows to extend a method based on inclusion problems to microwave frequencies. However it is limited by the occurrence of the skin effect in conductive inclusions. The second consider Joule losses and extends the first method after the occurrence of the skin effect. This second homogenization method is finally used to model the behavior of a realistic shielding enclosure.
identifier: NNT: 2013PA112302
issued: 2026-05-07T15:13:22.640805
language: fr
modified: 2026-05-07T15:13:22.640810
contact point: Organization
  fn: CCSD
keyword: characteristic-size
keyword: compatibilite-electromagnetique
keyword: effective-medium
keyword: electromagnetic-compatibility
keyword: heterogeneous-material
keyword: homogeneisation
keyword: homogenization
keyword: inclusion-problem
keyword: infoeu-reposemanticsdoctoralthesis
keyword: joule-losses
keyword: materiaux-composites
keyword: maxwell-garnett
keyword: maxwell-garnett-model
keyword: micro-ondes
keyword: microwave-frequencies
keyword: milieu-homogene-equivalent
keyword: pertes-par-effet-joule
keyword: physcondcm-genphysics-physicscondensed-matter-cond-matother-cond-matother
keyword: problemes-dinclusion
keyword: taille-caracteristique
keyword: theses
landing page: https://theses.hal.science/tel-00924648

Homogenization methods for electromagnetic modeling of composite materials. Application to shielding enclosures of electronic devices
type: Distribution
format: HTML
issued: 2026-05-07T15:13:22.647238
modified: 2026-05-07T15:13:22.623842
access URL: https://theses.hal.science/tel-00924648

test_moissonnage_selune
type: Agent