Skip to Main content Skip to Navigation
Theses

Thermoplastiques renforcés en fibres de verre courtes : comportement cyclique, fatigue et durée de vie

Abstract : Short glass fiber reinforced thermoplastics (SGFRTP) are a cost-efficient solution for the automotive industry, combining sufficient specific stiffness with a large freedom of shapes provided by injection molding. This thesis aims at developing an approach for fatigue design of structural components made of SGFRTP, based on the example of a polyamide 66 filled with 35 % of short glass fibers. The first step of this work consists in the modelling of the nonlinear cyclic behaviour, describing deformation mechanisms such as viscoelasticity, viscoplasticity and cyclic softening, for various hygrothermal conditions. The anisotropic model takes into account the fiber orientation distribution which results from the molding process, and is validated on structures. A fatigue criterion formulated with the dissipated energy density per cycle is proposed. It relies on the knowledge of local mechanical loadings and non linear mechanisms.
Complete list of metadatas

https://pastel.archives-ouvertes.fr/pastel-00653601
Contributor : Antoine Launay <>
Submitted on : Monday, December 19, 2011 - 5:48:38 PM
Last modification on : Friday, September 25, 2020 - 3:35:51 AM
Long-term archiving on: : Tuesday, March 20, 2012 - 2:48:10 AM

Identifiers

  • HAL Id : pastel-00653601, version 1

Citation

Antoine Launay. Thermoplastiques renforcés en fibres de verre courtes : comportement cyclique, fatigue et durée de vie. Mécanique [physics.med-ph]. Ecole Polytechnique X, 2011. Français. ⟨pastel-00653601⟩

Share

Metrics

Record views

1746

Files downloads

862