Etude de la fatigue des roulements hybrides en conditions de fonctionnement aggravées

Etude de la fatigue des roulements hybrides en conditions de fonctionnement aggravées PDF Author: Corentin Robitaille
Publisher:
ISBN:
Category :
Languages : fr
Pages : 204

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Book Description
Ce travail est consacré à l'étude de la fatigue des roulements hybrides (Si3N4 / M50 Duplex) soumis à des sollicitations extrêmes. Dans un premier temps, nous avons étudié le comportement expérimental du M50 trempé et du M50 Duplex sollicités en fatigue de roulement en présence d'indentation artificielle, dans le cas d'un contact hybride. Nous avons alors pu mettre en évidence le rôle prépondérant du glissement et nous avons pu caractériser et localiser l'endommagement relatif à ces conditions extrêmes. Aussi deux études portant sur la fissuration des éléments M50 Duplex, fissures radiales en bord d'indent, et sur la fissuration des éléments céramique Si3N4, sous forme de C-Cracks, ont été réalisées et ont permis d'évaluer la résistance de ces matériaux en sollicitation aggravée. Dans une seconde étape, nous avons mis au point une méthode d'évaluation du gradient de plasticité par mesure de la micro-dureté qui nous a permis de caractériser le M50 Duplex dans la zone de diffusion de la nitruration. Le processus d'indentation a alors été simulé par le logiciel éléments finis ABAQUS. Ces simulations ont permis d'analyser les mécanismes responsables de la fissuration des indents sur M50 Duplex. Enfin une étude numérique tridimensionnelle du roulement sur indent a été réalisée via le code semi-analytique ISAAC, développé au laboratoire LAMCOS de l'INSA de Lyon. Cette étude a permis d'évaluer le cycle de chargement au voisinage d'indents sollicités en fatigue de roulement. L'application du critère de Dang Van à ce cycle de sollicitation a alors permis de donner des indications quant à la prédiction de l'endommagement au voisinage d'indents.

Etude de la fatigue des roulements hybrides en conditions de fonctionnement aggravées

Etude de la fatigue des roulements hybrides en conditions de fonctionnement aggravées PDF Author: Corentin Robitaille
Publisher:
ISBN:
Category :
Languages : fr
Pages : 204

Get Book Here

Book Description
Ce travail est consacré à l'étude de la fatigue des roulements hybrides (Si3N4 / M50 Duplex) soumis à des sollicitations extrêmes. Dans un premier temps, nous avons étudié le comportement expérimental du M50 trempé et du M50 Duplex sollicités en fatigue de roulement en présence d'indentation artificielle, dans le cas d'un contact hybride. Nous avons alors pu mettre en évidence le rôle prépondérant du glissement et nous avons pu caractériser et localiser l'endommagement relatif à ces conditions extrêmes. Aussi deux études portant sur la fissuration des éléments M50 Duplex, fissures radiales en bord d'indent, et sur la fissuration des éléments céramique Si3N4, sous forme de C-Cracks, ont été réalisées et ont permis d'évaluer la résistance de ces matériaux en sollicitation aggravée. Dans une seconde étape, nous avons mis au point une méthode d'évaluation du gradient de plasticité par mesure de la micro-dureté qui nous a permis de caractériser le M50 Duplex dans la zone de diffusion de la nitruration. Le processus d'indentation a alors été simulé par le logiciel éléments finis ABAQUS. Ces simulations ont permis d'analyser les mécanismes responsables de la fissuration des indents sur M50 Duplex. Enfin une étude numérique tridimensionnelle du roulement sur indent a été réalisée via le code semi-analytique ISAAC, développé au laboratoire LAMCOS de l'INSA de Lyon. Cette étude a permis d'évaluer le cycle de chargement au voisinage d'indents sollicités en fatigue de roulement. L'application du critère de Dang Van à ce cycle de sollicitation a alors permis de donner des indications quant à la prédiction de l'endommagement au voisinage d'indents.

Graphic History

Graphic History PDF Author: Philip Benedict
Publisher: Librairie Droz
ISBN: 9782600004404
Category : Art
Languages : en
Pages : 454

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Book Description
The suite of forty prints published in Geneva in 1570 depicting the wars, massacres and troubles of the French Wars of Religion may have been the first picture history made in woodcuts or etchings that promised a geenral public a true view of great events of the recent past. This richly illustrated study reconstructs the gradual elaboration of this experimental work, situating it within the previously untold story of the use of the graphic arts to report the news in the fist centuries of European printmaking. Successive chapters explore the pictorial traditions that inspired the printmakers, examine how they gathered their information, assess the reliability of the scenes, and analyze the historical vision informing the series. Part 2 reproduces the full suite with commentary in double page fold-outs. Through the study of a single print series, lost chapters in the history of jorunalism, of the graphic arts, and of Protestant historical consciousness re-emerge.

The Judgment of Palaemon

The Judgment of Palaemon PDF Author: Philip Ford
Publisher: BRILL
ISBN: 9004245391
Category : History
Languages : en
Pages : 287

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Book Description
In Virgil's third Eclogue, Palaemon concludes the poetry competition between Menalcas and Damoetas by saying that he cannot choose between them, a judgment that is emblematic of the contest between Neo-Latin and vernacular poetry in Renaissance France. Both forms of poetry draw on similar roots, both are equally accomplished, and the contest between them is largely amicable. The Judgment of Palaement illustrates the almost symbiotic relationship between Renaissance Latin and French poetry, while exploring poets' motivation for choosing one language over another, the different challenges each form of writing involved, and the extent of the collaboration between different language communities. It focuses on some of the major writers of the period, as well as less known ones, and on genres specific to humanist poetry. It shows that composing in Latin was often considered more natural than writing in the vernacular, at a time when many Frenchmen's mother tongue was a non-standard French dialect or distinct language. Book jacket.

This Thing of Darkness

This Thing of Darkness PDF Author: Joan Neuberger
Publisher: Cornell University Press
ISBN: 1501732781
Category : Performing Arts
Languages : en
Pages : 507

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Book Description
This Thing of Darkness, Joan Neuberger's engrossing production history of Sergei Eisenstein's Ivan the Terrible, is a major contribution to the study of Eisenstein and thus informs the history and theory of cinema and the study of Soviet culture and politics. Neuberger's ability to mine, interpret, and connect Eisenstein's voluminous, intriguingly digressive writings makes this book exceptional.— Karla Oeler, Stanford University Sergei Eisenstein's unfinished masterpiece, Ivan the Terrible, was no ordinary movie. Commissioned by Joseph Stalin in 1941 to justify state terror in the sixteenth century and in the twentieth, the film's politics, style, and epic scope aroused controversy even before it was released. In This Thing of Darkness, Joan Neuberger offers a sweeping account of the conception, making, and reception of Ivan the Terrible that weaves together Eisenstein's expansive thinking and experimental practice with a groundbreaking new view of artistic production under Stalin. Drawing on Eisenstein's unpublished production notebooks, diaries, and manuscripts, Neuberger's riveting narrative chronicles Eisenstein's personal, creative, and political challenges and reveals the ways cinematic invention, artistic theory, political critique, and historical and psychological analysis went hand in hand in this famously complex film. Neuberger's bold arguments and daring insights into every aspect of Eisenstein's work during this period, together with her ability to lucidly connect his wide-ranging late theory with his work on Ivan, show the director exploiting the institutions of Soviet artistic production not only to expose the cruelties of Stalin and his circle but to challenge the fundamental principles of Soviet ideology itself. Ivan the Terrible, she argues, shows us one of the world's greatest filmmakers and one of the 20th century's greatest artists observing the world around him and experimenting with every element of film art to explore the psychology of political ambition, uncover the history of recurring cycles of violence and lay bare the tragedy of absolute power.

Nonindifferent Nature

Nonindifferent Nature PDF Author: Sergei Eisenstein
Publisher: Cambridge ; New York : Cambridge University Press
ISBN:
Category : Performing Arts
Languages : nl
Pages : 494

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Book Description
Theorieën van de Russische filmregisseur (1898-1948) over de vele mogelijkheden van het medium film

Geosimulation

Geosimulation PDF Author: Itzhak Benenson
Publisher: John Wiley & Sons
ISBN: 9780470843499
Category : Science
Languages : en
Pages : 320

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Book Description
Geosimulation is hailed as ‘the next big thing’ in geographic modelling for urban studies. This book presents readers with an overview of this new and innovative field by introducing the spatial modelling environment and describing the latest research and development using cellular automata and multi-agent systems. Extensive case studies and working code is available from an associated website which demonstrate the technicalities of geosimulation, and provide readers with the tools to carry out their own modelling and testing. The first book to treat urban geosimulation explicitly, integrating socio-economic and environmental modelling approaches Provides the reader with a sound theoretical base in the science of geosimulation as well as applied material on the construction of geosimulation models Cross-references to an author-maintained associated website with downloadable working code for readers to apply the models presented in the book Visit the Author's Website for further information on Geosimulation, Geographic Automata Systems and Geographic Automata Software http://www.geosimulationbook.com

Eisenstein on Paper

Eisenstein on Paper PDF Author: Naum Kleiman
Publisher: National Geographic Books
ISBN: 0500093938
Category : Art
Languages : en
Pages : 0

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Book Description
The first comprehensive book on the extensive, yet rarely seen, graphic works of pioneering filmmaker Sergei Eisenstein Sergei Eisenstein is regarded as one of cinema’s greatest revolutionaries. Less well known is that he was also a prolific graphic artist who drew compulsively as a means of expressing his ideas. Arranged chronologically, Eisenstein on Paper is divided into six chapters, each prefaced by short texts relating to the graphic works of each distinct period, and interwoven with excerpts from Eisenstein’s own essays and diary entries. In 1930 Eisenstein traveled to the United States and then Mexico, where he produced hundreds of drawings influenced by ancient and contemporary Mexican art. Forced to return to Russia in 1932, Eisenstein came under the scrutiny of the Communist government and, struggling to make further films without political interference, turned again to sketching for artistic freedom. By the end of his life, he had pared his style down to the utmost simplicity and sincerity. Despite completing relatively few films in his lifetime, Eisenstein made several thousand drawings. Eisenstein on Paper is the product of a groundbreaking collaboration with RGALI, the Russian State Archive of Arts and Literature, and is a fitting tribute to an incredible graphic talent.

In Excess

In Excess PDF Author: Masha Salazkina
Publisher: University of Chicago Press
ISBN: 0226734161
Category : Performing Arts
Languages : en
Pages : 232

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Book Description
During the 1920s and ’30s, Mexico attracted an international roster of artists and intellectuals—including Orson Welles, Katherine Anne Porter, and Leon Trotsky—who were drawn to the heady tumult engendered by battling cultural ideologies in an emerging center for the avant-garde. Against the backdrop of this cosmopolitan milieu, In Excess reconstructs the years that the renowned Soviet director Sergei Eisenstein spent in the country to work on his controversial film ¡Que Viva Mexico! Illuminating the inextricability of Eisenstein’s oeuvre from the global cultures of modernity and film, Masha Salazkina situates this unfinished project within the twin contexts of postrevolutionary Mexico and the ideas of such contemporaneous thinkers as Walter Benjamin. In doing so, Salazkina explains how Eisenstein’s engagement with Mexican mythology, politics, and art deeply influenced his ideas, particularly about sexuality. She also uncovers the role Eisenstein’s bisexuality played in his creative thinking and identifies his use of the baroque as an important turn toward excess and hybrid forms. Beautifully illustrated with rare photographs, In Excess provides the most complete genealogy available of major shifts in this modern master’s theories and aesthetics.

Urban Social Theory

Urban Social Theory PDF Author: Michael Bounds
Publisher:
ISBN:
Category : Social Science
Languages : en
Pages : 404

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Book Description
This book provides a comprehensive coverage of urban social theory within the history of social thought. It's an accessible and comprehensive coverage of the major social theorists and schools.

Masks, Mimes and Miracles

Masks, Mimes and Miracles PDF Author: Allardyce Nicoll
Publisher:
ISBN:
Category : Commedia dell'arte
Languages : en
Pages : 418

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Book Description