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Composites BMC injectés : analyse et modélisation multi-échelles du comportement endommageable

Abstract : Schneider Electric is developing technical parts used in the area of Low Voltage Power, medium voltage and industrial control. These parts are highly constrained in terms of dielectric, mechanical and thermal properties. This study is carried out on BMC materials (Bulk Molding Compound), applied in electrical industry and expected to answer all the properties mentioned before. In general, all the BMC composites are based on polyester resin used with low shrink additive and mineral fillers. One can obtain different properties by the method of processing and varying the amount or the nature of each component of the formulation. The design of pieces and the choice of the composite materials allow us to reach the main properties expected for such application. The main objective of Schneider Electric is to create a tool for the design of these BMC pieces, describing their mechanical properties as a function of the proposed formulation. We have proposed an approach to establish a numerical model allowing us to predict the behavior of BMC composites based on the properties of each constituent of the formulation. The proposed approach is based on a multi-scale homogenization of random media. The experimental results allowed us to determine precisely the micro-structure of the materials and its influence on the macroscopic scale (mechanical properties). They have permitted us to highlight the specificities of this class of materials. The results are integrated into a model of Mori-Tanaka type, coupled with the inclusion of damages like the formation of voids growth and the debonding of fibers.
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https://pastel.archives-ouvertes.fr/pastel-00668717
Contributor : Thi Tuyet Nhung Le <>
Submitted on : Friday, February 10, 2012 - 11:28:11 AM
Last modification on : Friday, July 17, 2020 - 2:54:12 PM
Long-term archiving on: : Friday, May 11, 2012 - 2:41:34 AM

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  • HAL Id : pastel-00668717, version 1

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Thi Tuyet Nhung Le. Composites BMC injectés : analyse et modélisation multi-échelles du comportement endommageable. Mécanique des matériaux [physics.class-ph]. Arts et Métiers ParisTech, 2011. Français. ⟨NNT : 2011ENAM0053⟩. ⟨pastel-00668717⟩

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