| Titre : |
In-Situ Investigation of Cavity Nucleation and Growth in Hydrogen-Exposed EPDM during Decompression |
| Titre original : |
Caractérisation in-situ de la nucléation et croissance de cavités sous décompression dans un EPDM exposé à de fortes pressions d'hydrogène |
| Type de document : |
thèse |
| Auteurs : |
Mahak FAZAL, Auteur ; Sylvie CASTAGNET, Directeur de thèse ; Shin NISHIMURA, Directeur de thèse ; Institut PPRIME UPR CNRS 3346 - PMM, Commanditaire ; Gerald PINTER, Examinateur ; Lucien LAIARINANDRASANA, Examinateur ; Olivier LAME, Examinateur ; Sylvie TENCE-GIRAULT, Examinateur ; Azdine NAIT ALI, Auteur |
| Importance : |
170 p. |
| Note générale : |
NNT 2019ESMA0017
Acknowledgements
Table of Contents
General Introduction
Résumé étendu en français
List of Figures
List of Tables
Bibliography
Abstract
Keywords
|
| Catégories : |
Cavitation
Élastomères
Éléments finis, Méthode des
Endommagement, Mécanique de l' (milieux continus)
Hydrogène
Matériaux:Effets des hautes pressions
Tomographie
|
| Résumé : |
BIBLIOGRAPHY
Molecular Structure
Mechanical Properties
Cavitation in Elastomers: a Global View
Modelling Approaches
Mechanisms of Diffusion in Polymers
Caviation Induced by Gas Decompression
Morphology of the Damage
Origin of Cavities - A Molecular Approach
Experimental Tracking of Cavitation
Synthesis of the Study
MATERIAL CHARACTERIZATION
Chemical Composition of EPDM
Hydrogen Release Profile and Diffusivity
Hydrogen Content and Pressure
Volume Change Coefficient Due to Hydrogen Sorption
Mechanical Properties
CHARACTERIZATION OF EPDM AT SUB-MICRON SCALE USING SAXS
Motivation
Experimental Set-Up
Primary Data Processing
Scattering Due to Non-Particulate Systems
X-Ray Scattering for Samples Before Exposure and at Equilibrium
Scattering Intensities for Exposed Samples
Conclusions
IN-SITU TRACKING OF CAVITIES AT MICRON SCALE USING 3D X-RAY TOMOGRAPHY
Experimental Set-Up
Data Treatment
Classification of Damage Based on Morphology
Inflation Characteristics of Isolated Cavities
Factors Influencing the Growth Kinetics of Isolated Cavities
Relationship of Growth Kinetics of Cavities With Macroscopic Desorption
Inflation Characteristics of Close Cavities
Conclusions
INVESTIGATION OF INTERACTION EFFECTS BETWEEN CLOSE CAVITIES USING FINITE ELEMENT SIMULATION
Difficulties in Simulation of Cavity Growth Due to Gas Decompression
Development of an Alternate solution With the Internal Finite Element Code FOXTROT
Use of FOXTROT Software in the COntext of Present Work
Simulation of the Cavity Growth Using Modified Parameters
Conclusions
GENERAL CONCLUSIONS AND PERSPECTIVES |
| En ligne : |
https://tel.archives-ouvertes.fr/tel-03411094 |
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