Download or read book Usure et frottement sec de superalliages written by Emmanuel Papa and published by . This book was released on 1984 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette étude est consacrée à l'usure et au frottement sec à la température ambiante et à haute température de superalliages industriels complexes à base de nickel, fer-nickel et cobalt. Un tribomètre alternatif, simulant un contact étroit a été construit et instrumenté. L'amélioration de la tenue au frottement et à l'usure à sec aux températures élevées a été dégagée et discutée en fonction de la nature et des propriétés de couches intercalaires d'oxydes, troisième corps du contact, designé surface vitreuse compte tenu de son aspect.

Download or read book 4th European Tribology Congress Ecully France 9 12 Septembre 1985 written by and published by . This book was released on 1985 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Le frottement et l usure sec en relation avec les propri t s physiques et chimiques des couches superficielles sous jacentes written by Guy Bellanger and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Le frottement sec et l usure Evolution de ces questions d apr s la bibliographie des vingt derni res ann es Th ories modernes et applications pratiques written by Paulette Leblanc and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comportement en frottement sec et l usure d un ruban m tallique amorphe written by Georges GIRERD and published by . This book was released on 1983 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Etude exp rimentale du frottement sec grande vitesses de glissement written by Sylvain Philippon and published by . This book was released on 2004 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: La compréhension des lois de frottement est essentielle pour modéliser entre autres les processus de mise en forme des métaux et d'usure. Plusieurs études sont concernées par le frottement à grandes vitesses de glissement. Un dispositif expérimental original a été conçu pour étudier le frottement sec pour des conditions statique et dynamique en évitant les contraintes dues àl'usure. Les grandes vitesses de glissement (de 13 m/s a 60 m/s) et les petites vitesses de glissement (de 0 a 3 m/s) sont obtenues respectivement avec un canon à air comprimé et une machine hydraulique utilisant le même dispositif de frottement. Les caractéristiques intéressantes de ce dispositif de frottement dynamique sont liées à la vitesse de glissement identique pour tous les points de la zone de contact et au processus de frottement quasi stationnaire atteint après une courte phase transitoire. Les effets sur le frottement de la pression normale p et de la vitesse de glissement v sont examinés. Les résultats obtenus pour le coefficient de frottement acier sur acier sont en accord avec ceux collectes dans la littérature et permettent de valider ce dispositif expérimental. Un deuxième couple de matériaux (acier sur carbure de tungstène non revêtu) a été teste pour reproduire l'interaction outil-copeau en usinage a grande vitesse. La chute du coefficient de frottement avec l'augmentation de la vitesse de glissement est confirmé. Cependant pour les plus grandes vitesses, une tendance opposé est observé. Enfin, les réultats du coefficient de frottement calculé avec les modèles proposes par ettles et molinari et al. Sont comparés avec les données mesurés avec le dispositif expéimental

Download or read book Conference on New Structural Materials written by and published by Eusko Jaurlaritza. This book was released on 1988 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.

Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.

Download or read book Scientific Canadian Mechanics Magazine and Patent Office Record written by Canada. Patent Office and published by . This book was released on 1966-03 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt: