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Dissertations / Theses on the topic 'Passive Piles'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

CAFERRI, LEONARDO. "Elasto-plastic models for the response of passive rigid piles." Doctoral thesis, Università Politecnica delle Marche, 2017. http://hdl.handle.net/11566/245380.

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Paratie di pali passivi sono state adottate con successo nel passato sia come intervento stabilizzante di fenomeni franosi attivi sia al fine di prevenire future instabilità, tanto da essere oggi una tecnica ampiamente accettata nella pratica ingegneristica. Mentre i pali passivi sono generalmente impiegati con lo scopo di ridurre l’entità degli spostamenti del terreno, i criteri di progetto più comunemente utilizzati fanno riferimento alle sole condizioni limite del sistema palo-terreno, non considerando affatto fenomeni di interazione e per questo non risultando adeguati alla valutazione de

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2

Ozturk, Sevki. "Distribution Of Bending Moments In Laterally Loaded Passive Pile Groups A Model Study." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12610378/index.pdf.

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In this study, bending moment distributions developed in laterally loaded passive pile and passive pile groups in cohesionless soil were investigated in laboratory conditions through model pile experiments. Different from the active pile loading, the lateral load was given directly to the piles using a movable large direct shear box. In these experiments strain gauges fastened to the piles and a computer based data reading system were used. The strain values were measured at five levels on the piles. The behavior of a single pile and a pile group having five piles were investigated through str

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3

Silva, Sanchez Rosa Elvira. "Contribution au pronostic de durée de vie des systèmes piles à combustible PEMFC." Thesis, Besançon, 2015. http://www.theses.fr/2015BESA2005/document.

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Les travaux de cette thèse visent à apporter des éléments de solutions au problème de la durée de vie des systèmes pile à combustible (FCS – Fuel Cell System) de type à « membrane échangeuse de protons » (PEM – Proton Exchange Membrane) et se décline sur deux champs disciplinaires complémentaires :Une première approche vise à augmenter la durée de vie de celle-ci par la conception et la mise en œuvre d'une architecture de pronostic et de gestion de l'état de santé (PHM – Prognostics & Health Management). Les PEM-FCS, de par leur technologie, sont par essence des systèmes multi-physiques (é

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4

Xing, Lanchang. "Passive slug mitigation by applying wavy pipes." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/9339.

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This work is to develop a passive slug mitigation technique based on a novel flow conditioner, wavy pipe, through laboratory experiment and numerical simulation. The wavy pipe has been applied to two types of slug flows: severe slugging in pipeline/riser systems and hydrodynamic slug flow in horizontal pipelines. The experiment of severe slugging mitigation was conducted on the 2” and 4” pipeline/riser systems in the Three-Phase Test Facility in PSE (Process Systems Engineering) Laboratory. The flow regimes in the pipeline/riser systems have been classified into four categories, i.e. severe sl

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5

Erentürk, Murat 1971. "The simulation of passive water hammer in pipes." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/38146.

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6

Ramirez, Rivera Victor Manuel. "Energy management of lossy multi-port to fuel cell-based systems." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112087/document.

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Dans de nombreux réseaux, la régulation efficace du transfert d'énergie entre les sous-systèmes de production, de stockage et d'utilisation demeure un sujet difficile à traiter. Dans cette thèse on a proposent une nouvelle stratégie pour atteindre cet objectif, ainsi que sa mise en œuvre. Le dispositif est appelé routeur d'énergie dynamique (RED), parce que, contrairement à la pratique actuelle, l'asservissement de l'écoulement de puissance se fait sans s'appuyer sur des hypothèses stationnaire. Une hypothèse clé pour le bon fonctionnement du RED est que la dissipation du système est négligeab

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7

Zhan, Weiguo. "Static pile passive aeration composting of poultry manure slurry." Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6892.

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Static pile passive aeration composting (SPPAC) method is simple and economical. It can be applied to treat and stabilize animal wastes and reduce their adverse impact on the environment such as water, soil and air pollution. A study was carried out to investigate the effectiveness of SPPAC process for poultry manure slurry treatment under high initial MC conditions, using peat and straw as the bulking agents. Four treatments were examined, two of which were mixtures of poultry manure slurry and peat with initial MC of 73 and 80%. The other two treatments consisted of poultry manure slurry and

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8

Kartha, Satish Chandrashekhar. "Active, Passive and Active/Passive Control Techniques For Reduction of Vibrational Power Flow in Fluid Filled Pipes." Thesis, Virginia Tech, 2000. http://hdl.handle.net/10919/31156.

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The coupled nature of vibrational energy flow in fluid filled piping systems makes its control and subsequent reduction a difficult problem. This work experimentally explores the potential of different active, passive and active/passive control methodologies for control of vibrational power flow in fluid filled pipes. Circumferential modal decomposition and measurements of vibrational power carried by individual wave types were carried out experimentally. The importance of dominant structural bending waves and the need to eliminate them in order to obtain meaningful experimental results has be

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9

Marsh, Robert Ashall. "Passive Earth pressures on a pile cap with a dense sand backfill /." Diss., CLICK HERE for online access, 2010. http://contentdm.lib.byu.edu/ETD/image/etd3356.pdf.

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10

Marsh, Robert Ashall. "Passive Earth Pressures on a Pile Cap with a Dense Sand Backfill." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1958.

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Pile groups are often used to provide support for structures. Capping a pile group further adds to the system's resistance due to the passive earth pressure from surrounding backfill. While ultimate passive earth pressure under static loading conditions can be readily calculated using several different theories, the effects of cyclic and dynamic loading on the passive earth pressure response are less understood. Data derived from the full-scale testing of a pile cap system with a densely compacted sand backfill under static, cyclic, and dynamic loadings was analyzed with particular focus on so

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11

Bingham, Nathanael G. "Passive Resistance of Abutments with MSE Wingwalls." BYU ScholarsArchive, 2012. https://scholarsarchive.byu.edu/etd/3201.

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Large scale static lateral load tests were performed on a pile cap under varying sand backfill configurations: no backfill, full-width dense sand backfill, dense sand slip plane confined backfill, and two configurations of dense sand MSE wall confined backfills. Efforts were made to maintain the relative compaction of the backfills for each of the tests near the same value. The MSE wall panel arrangement was varied to determine the effect of different reinforcement configurations on the passive resistance and wall panel displacement. Passive force-displacement curves were generated from each t

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12

Kong, Suyao. "Advanced passivity-based control for hybrid power systems : application to hybrid electric vehicles and microgrids." Thesis, Bourgogne Franche-Comté, 2020. http://indexation.univ-fcomte.fr/nuxeo/site/esupversions/a01b06c5-fb6c-452d-bd16-02b269cd0bb9.

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Un système hybride à base de pile à combustible (PàC) est une solution efficace pour faire face aux problèmes de pollution atmosphérique et de pénurie des combustibles fossiles. Cette thèse se concentre sur la conception de la commande pour les systèmes d'alimentation hybrides à base de PàC, et appliquée à deux applications : le véhicule électrique et le centre de données alimenté par un micro-réseau.Tout d'abord, cette thèse propose une commande basée sur la passivité pour un système hybride PàC/supercondensateurs (SCs). Cette commande a été conçue via la méthode de conception IDA-PBC (Interc

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13

Morin, Benoît. "Hybridation d'une pile à combustible par des supercondensateurs : vers une solution passive et directe." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2013. http://tel.archives-ouvertes.fr/tel-00821123.

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La faisabilité des applications à piles à combustible (PAC) a été largement démontrée à travers le monde. Les efforts de recherche portent actuellement sur l'amélioration de la durée de vie des PAC et la diminution de leur coût. A ce jour, une PAC ne tolère pas les variations rapides de charges qui entraînent très souvent son vieillissement prématuré. Pour pallier cette faiblesse, une hybridation avec un composant électrochimique de stockage (typiquement des supercondensateurs) est généralement proposée via un ou deux convertisseurs statiques, nécessitant l'implantation d'une gestion énergétiq

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14

Guo, Zifan. "Numerical Analysis of Passive Force on Skewed Bridge Abutments." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/6151.

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Accounting for seismic forces and thermal expansion in bridge design requires an accurate passive force-deflection relationship for the abutment wall. Current design codes make no allowance for skew effects on passive force; however, large scale field tests indicate that there is a substantial reduction in peak passive force as skew angle increases. A reduction in passive force also reduces the transverse shear resistance on the abutment. The purpose of this study is to validate three-dimensional model using PLAXIS 3D, against large scale test results performed at Brigham Young University and

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15

Marsh, Aaron Kirt. "Evaluation of Passive Force on Skewed Bridge Abutments with Large-Scale Tests." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3921.

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Accounting for seismic forces and thermal expansion in bridge design requires an accurate passive force versus backwall deflection relationship. Current design codes make no allowances for skew effects on the development of the passive force. However, small-scale experimental results and available numerical models indicate that there is a significant reduction in peak passive force as skew angle increases for plane-strain cases. To further explore this issue large-scale field tests were conducted at skew angles of 0°, 15°, and 30° with unconfined backfill geometry. The abutment backwall was 11

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16

Curtis, Joshua Rex. "Effect of Inclined Loading on Passive Force-Deflection Curves and Skew Adjustment Factors." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7255.

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Skewed bridges have exhibited poorer performance during lateral earthquake loading in comparison to non-skewed bridges (Apirakvorapinit et al. 2012; Elnashai et al. 2010). Results from numerical modeling by Shamsabadi et al. (2006), small-scale laboratory tests by Rollins and Jessee (2012), and several large-scale tests performed by Rollins et al. at Brigham Young University (Franke 2013; Marsh 2013; Palmer 2013; Smith 2014; Frederickson 2015) led to the proposal of a reduction curve used to determine a passive force skew reduction factor depending on abutment skew angle (Shamsabadi and Rollin

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17

Strassburg, Alec N. "Influence of Relative Compaction on Passive Resistance of Abutments with Mechanically Stabilized Earth (MSE) Wingwalls." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2593.

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Large scale static lateral load tests were completed on a pile cap with wingwalls under several different sand backfill configurations: no backfill, loosely compacted unconfined, loosely compacted slip plane wall confined, loosely compacted MSE wingwall confined, and densely compacted MSE wingwall confined. The relative compaction of the backfill was varied during each test to observe the change in passive resistance provided by the backfill. The wall types were varied to observe the force placed on the walls and the wall displacement as a result of the laterally loaded pile cap and backfill r

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18

Musskopf, Diego Boschetti. "Estudos exploratórios sobre ventilação natural por tubos enterrados." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2006. http://hdl.handle.net/10183/11803.

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O uso do solo como massa inercial para condicionamento térmico de edificações por contato direto é uma prática antiga, porém, seu uso como trocador de calor através de dutos enterrados, para ventilação natural de edificações é recente. A prática consiste em enterrar dutos a profundidades entre 0,5m e 1,5m – com extensões e diâmetros variáveis – por onde o ar circula do exterior para o interior dos ambientes através da ação do vento externo e da convecção natural. Durante o trajeto, o ar troca calor com o solo e ingressa no ambiente a temperaturas mais amenas. Embora seja um sistema já empregad

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19

Adsero, Matthew E. "Impact of Jet Grouting on the Lateral Strength of Soil Surrounding Driven Pile Foundations." BYU ScholarsArchive, 2008. https://scholarsarchive.byu.edu/etd/1378.

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Jet grouting was used to strengthen the soft soil surrounding the piles and the pile cap of two full-scale driven pile foundations. Soilcrete columns, created by jet grouting, were placed underneath the pile cap and surrounding the piles of the first foundation. Two rows of soilcrete columns were placed around the perimeter of one-side of the second. All of the jet grouting took place after construction of the pile caps. Laboratory testing of the soilcrete slurry showed the columns as having a design unconfined compressive strength of 550-650 psi, compared with the native soil strength of only

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20

Valentine, Todd J. "Dynamic Testing of a Full-Scale Pile Cap with Dense Silty Sand Backfill." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd2021.pdf.

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21

Palmer, Katie Noel. "Large-Scale Testing of Passive Force Behavior for Skewed Abutments with High Width-Height Ratios." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/4176.

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The effects of seismic forces and thermal expansion on bridge performance necessitate an accurate understanding of the relationship between passive force and backwall deflection. In past case studies, skewed bridges exhibited significantly more damage than non-skewed bridges. These findings prompted studies involving numerical modeling, lab-scale tests, and large-scale tests that each showed a dramatic reduction in passive force with increased skew. Using these results, a correlation was developed between peak passive force and backwall skew angle. The majority of these tests had length to hei

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22

Lavigne, Olivier. "Caractérisation des films passifs pour la définition de nouveaux matériaux : application aux plaques bipolaires métalliques des systèmes PEMFCs." Lyon, INSA, 2009. http://theses.insa-lyon.fr/publication/2009ISAL0047/these.pdf.

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L’objectif de ce travail est de déterminer des solutions matériaux pour la réalisation de plaques bipolaires embouties, répondant aux spécifications techniques d’une utilisation en milieu pile à combustible de type PEMFC. Sur la base des propriétés d’usage, l’acier 316L a été proposé comme matériau de référence. Pour autant la conductivité de sa couche passive formée en surface reste faible, et fait ainsi chuter les performances de la pile. La modification de la surface de ce matériau est donc indispensable. La première voie développée dans ce travail a été d’élaborer un dépôt par PVD de type

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23

Smith, Kyle Mark. "Passive Force on Skewed Bridge Abutments with Reinforced Concrete Wingwalls Based on Large-Scale Tests." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/5577.

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Skewed bridges have exhibited poorer performance during lateral earthquake loading when compared to non-skewed bridges (Apirakvorapinit et al. 2012; Elnashai et al. 2010). Results from small-scale laboratory tests by Rollins and Jessee (2012) and numerical modeling by Shamsabadi et al. (2006) suggest that skewed bridge abutments may provide only 35% of the non-skewed peak passive resistance when a bridge is skewed 45°. This reduction in peak passive force is of particular importance as 40% of the 600,000 bridges in the United States are skewed (Nichols 2012). Passive force-deflection results b

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Smith, Jaycee Cornwall. "Evaluation of Passive Force Behavior for Bridge Abutments Using Large-Scale Tests with Various Backfill Geometries." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4107.

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Bridge abutments are designed to withstand lateral pressures from thermal expansion and seismic forces. Current design curves have been seen to dangerously over- and under-estimate the peak passive resistance and corresponding deflection of abutment backfills. Similar studies on passive pressure have shown that passive resistance changes with different types of constructed backfills. The effects of changing the length to width ratio, or including MSE wingwalls determine passive force-deflection relationships. The purpose of this study is to determine the effects of the wall heights and of the

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25

Franke, Bryan William. "Passive Force on Skewed Abutments with Mechanically Stabilized Earth (MSE) Wingwalls Based on Large-Scale Tests." BYU ScholarsArchive, 2013. https://scholarsarchive.byu.edu/etd/3909.

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Passive force-deflection behavior for densely compacted backfills must be considered in bridge design to ensure adequate resistance to both seismic and thermally induced forces. Current codes and practices do not distinguish between skewed and non-skewed bridge abutment geometries; however, in recent years, numerical models and small-scale, plane-strain laboratory tests have suggested a significant reduction in passive force for skewed bridge abutments. Also, various case studies have suggested higher soil stresses might be experienced on the acute side of the skew angle. For these reasons, th

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26

Fredrickson, Amy. "Large-Scale Testing of Passive Force Behavior for Skewed Bridge Abutments with Gravel and Geosynthetic Reinforced Soil (GRS) Backfills." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/5513.

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Correct understanding of passive force behavior is particularly key to lateral evaluations of bridges because plastic deformation of soil backfill is vital to dissipation of earthquake energy and thermally-induced stresses in abutments. Only recently have studies investigated the effects of skew on passive force. Numerical modeling and a handful of skewed abutment tests performed in sand backfill have found reduced passive force with increasing skew, but previous to this study no skewed tests had been performed in gravel or Geosynthetic Reinforced Soil (GRS) backfills. The goal of this study w

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Pruett, Joshua M. "Performance of a Full-Scale Lateral Foundation with Fine and Coarse Gravel Backfills Subjected to Static, Cyclic, and Dynamic Lateral Loads." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/2317.

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Full-scale lateral load tests were performed on a pile cap with five backfill conditions: no backfill, densely compacted fine gravel, loosely compacted fine gravel, densely compacted coarse gravel, and loosely compacted coarse gravel. Static loads, applied by hydraulic load actuators, were followed by low-frequency, actuator-driven cyclic loads as well as higher frequency dynamic loads from an eccentric mass shaker. Passive resistance from the backfill significantly increased the lateral capacity of the pile cap. Densely compacted backfill materials contributed about 70% of the total system re

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Cummins, Colin Reuben. "Behavior of a Full-Scale Pile Cap with Loosely and Densely Compacted Clean Sand Backfill under Cyclic and Dynamic Loadings." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1684.

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A series of lateral load tests were performed on a full-scale pile cap with three different backfill conditions, namely: with no backfill present, with densely compacted clean sand in place, and with loosely compacted clean sand in place. In addition to being displaced under a static loading, the pile cap was subjected to low frequency, small displacement loading cycles from load actuators and higher frequency, small displacement, dynamic loading cycles from an eccentric mass shaker. The passive earth pressure from the backfill was found to significantly increase the load capacity of the pile

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29

Loubser, Karl Albie. "An experimental study of an inherently-safe, natural circulating, flash-tube type system for a nuclear reactor steam supply concept." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96050.

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Thesis (MEng) -- Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: This project investigates aspects of a novel inherently safe nuclear power steam supply system as safety is of paramount importance. The system envisaged has unique features namely: a) a two-phase flow flash-tube type natural circulating primary loop (also the secondary radioactive particle containment); b) a twophase flow thermosyphon heat pipe type heat exchanger secondary loop is used to transfer heat from the primary loop to the steam generators, thereby physically separating the two flow streams from one another; c

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30

Lorthioir, Alain. "Méthode de simulation de circuits hautes fréquences et microondes à partir d'une pile "LIFO" : application à l'étude de filtres passifs." Lille 1, 1993. http://www.theses.fr/1993LIL10032.

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31

Hájek, Jan. "Projekt podzemních garáží v Brně." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2012. http://www.nusl.cz/ntk/nusl-225505.

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The goal of the project is behaviour and dimensioning of selected monolithic concrete structure elements. Design and assessment of the building foundation was made. Slabs of the floors are dimensioned in detail. All computations are made in accordance with Eurocode 2. Drawing documentation is part of this project.

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32

Rozvadská, Marcela. "Stavebně technologický projekt polyfunkčního domu Art Passage v Trenčíně." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2014. http://www.nusl.cz/ntk/nusl-227056.

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This thesis deals with the structural and technological project of multifunctional building Art Passage in Trencin. Solve division building construction and civil engineering objects, draw up the draft machine assembly time and financial plan. They will further focus on the rough construction of the main building structure, where processing technology studies during construction schedule, the project site equipment, budget and other documents that are necessary for the proper implementation of construction.

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Verwey, Aldo. "Modelling of a passive reactor cavity cooling system (RCCS) for a nuclear reactor core subject to environmental changes and the optimisation of the RCCS radiation heat shield heat shield." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4303.

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Thesis (MScEng (Mechanical and Mechatronic Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: A reactor cavity cooling system (RCCS) is used in the PBMR to protect the concrete citadel surrounding the reactor from direct nuclear radiation impingement and heat. The speci ed maximum operating temperature of the concrete structure is 65 ±C for normal operating conditions and 125 ±C for emergency shut-down conditions. A conceptual design of an entirely passive RCCS suitable for the PBMR was done by using closed loop thermosyphon heat pipes (CLTHPs) to remove heat from a rad

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Andre, Johan. "Optimisation des propriétés de conduction électrique et de passivité d'aciers inoxydables pour la réalisation de plaques bipolaires de pile à combustible de type pemfc." Grenoble INPG, 2007. http://www.theses.fr/2007INPG0105.

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Les piles à combustible à membrane échangeuse de protons (PEMFC) doivent répondre à des exigences élevées de coût, performance, et durabilité. Cette thèse propose ainsi d'optimiser les propriétés de conduction électrique et de passivité d'aciers inoxydables pour plaques bipolaires de PEMFC. Ce travail expose la problématique de l'emploi d'aciers inoxydables et des solutions correspondantes, les propriétés des films passifs sur aciers ainsi que leur modification par des procédés bas coût. Des caractérisations des matériaux ont été effectuées, permettant d'étudier le comportement de deux alliage

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Maldonado, Gutiérrez David. "La estructura financiera de las pymes catalanas: la dinámica en un contexto de recesión." Doctoral thesis, Universitat de Girona, 2013. http://hdl.handle.net/10803/120792.

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This research analyses the financial structure of companies in general, and subsequently, to study the factors that determine taking into account the internal vision of the company, with respect to the respective theories, and analysing the economic context also as a key aspect and preponderant in the definition of these structures. It concludes that companies in recent years have reduced their debt and strengthened their equity in general, due to the need for more economic and credit restrictions than a rational business decision. Differences were observed among smaller companies with more

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Boissy, Clément. "Transport de matière au sein du film passif : Développement d’une méthodologie sélective corrélant les Point Defect Model et les modèles descriptifs." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0136.

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Le développement de la plaque bipolaire - PB -métallique nécessite une amélioration des propriétés du matériau qui la constitue. L'utilisation de l'acier implique une meilleure compréhension du film passif - FP. En effet, le cahier des charges de la PB demande une bonne conduction électronique ainsi qu'une longue durée de vie. L'amélioration de ces paramètres passe par une meilleure corrélation et compréhension entre les propriétés semi-conductrices et la résistance à la corrosion. La difficulté liée à l'étude de la passivation réside dans les nombreux phénomènes modifiant le comportement du f

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Elshesheny, Ahmed, Mostafa H. A. Mohamed, and Therese Sheehan. "Protection of buried rigid pipes using geogrid-reinforced soil systems subjected to cyclic loading." 2020. http://hdl.handle.net/10454/18408.

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Yes<br>The performance of buried rigid pipes underneath geogrid-reinforced soil while applying incrementally increased cyclic loading was assessed using a fully instrumented laboratory rig. The influence of varying two parameters of practical importance was investigated; the pipe burial depth and the number of geogrid-layers. Measurements were taken for pipe deformation, footing settlement, strain in pipe and reinforcing layers, and pressure/soil stress on the pipe crown during various stages of cyclic loading. The research outcomes demonstrated a rapid increase in the rate of deformation of t

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Andre, Johan. "OPTIMISATION DES PROPRIETES DE CONDUCTION ELECTRIQUE ET DE PASSIVITE D'ACIERS INOXYDABLES POUR LA REALISATION DE PLAQUES BIPOLAIRES DE PILE A COMBUSTIBLE DE TYPE PEMFC." Phd thesis, 2007. http://tel.archives-ouvertes.fr/tel-00199010.

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Parmi les nouvelles technologies pour l'énergie inscrites dans un contexte de développement durable, les piles à combustible à membrane échangeuse de protons (PEMFC) présentent des aspects séduisants. Toutefois, pour rendre cette technologie compatible avec une application à grande échelle, elle doit répondre à des exigences strictes en terme de coût, performance, et durabilité. Cette thèse s'inscrit dans ce cadre, en proposant d'optimiser les propriétés de conduction électrique et de passivité d'aciers inoxydables pour la réalisation de plaques bipolaires pour PEMFC, en remplacement du graphi

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Boissy, Clémént. "Transport de matière au sein du film passif : Développement d’une méthodologie sélective corrélant les Point Defect Model et les modèles descriptifs." Thesis, 2014. http://www.theses.fr/2014ISAL0136/document.

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Abstract:

Le développement de la plaque bipolaire - PB -métallique nécessite une amélioration des propriétés du matériau qui la constitue. L'utilisation de l'acier implique une meilleure compréhension du film passif - FP. En effet, le cahier des charges de la PB demande une bonne conduction électronique ainsi qu'une longue durée de vie. L'amélioration de ces paramètres passe par une meilleure corrélation et compréhension entre les propriétés semi-conductrices et la résistance à la corrosion. La difficulté liée à l'étude de la passivation réside dans les nombreux phénomènes modifiant le comportement du f

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