Skip to Main content Skip to Navigation
Theses

Rôle des paramètres matériaux et structuraux dans l’homogénéisation numérique des composites C/C. Cas des sollicitations tribologiques de freinage

Abstract : To understand the mechanisms of wear and friction of carbon 1 carbon composites (C/C} used in aeronautical braking, a numerical model is used to separate the mechanical effects of the physico-chemical and thermal effects. The model is based on the use of an approach by finite elements (FE} and techniques of homogenization applied to a representative elementary volume (RVE} of the material in the mesoscopic scale rubbing on a rigid or deformable surface. In this scale, the material is described by a matrix in carbon and packages of carbon fiber called strands, perpendicular on the contact surface. To insure the representativeness of the structure of the material, several heterogeneous models are studied. The results are compared with those obtained with the equivalent homogeneous model which ensues from the homogenization. The influence of the conditions of contact (the rigidity), as well as the influence of the distribution of strands at the contact surface on the regimes of vibrations of the various models are revealing. The extension of the numerical model in a contact between two composites underline a strong increase of maximal constraints mainly localized in the strands present on the contact surface. These strong localizations of constraints can have for consequence the damage of strands what leads the degradation of the contact surface until the detachments of particles.
Document type :
Theses
Complete list of metadatas

Cited literature [36 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00743548
Contributor : Abes Star :  Contact
Submitted on : Friday, October 19, 2012 - 2:07:13 PM
Last modification on : Wednesday, July 8, 2020 - 12:42:29 PM
Long-term archiving on: : Sunday, January 20, 2013 - 3:39:29 AM

File

these.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-00743548, version 1

Citation

Coumba Mbodj. Rôle des paramètres matériaux et structuraux dans l’homogénéisation numérique des composites C/C. Cas des sollicitations tribologiques de freinage. Autre. INSA de Lyon, 2011. Français. ⟨NNT : 2011ISAL0028⟩. ⟨tel-00743548⟩

Share

Metrics

Record views

1467

Files downloads

1759