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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

The development of a new process for the manufacture of insulating refractories

Tyrrell, Miles E. January 1937 (has links) (PDF)
Thesis (B.S.)--University of Missouri, School of Mines and Metallurgy, 1937. / The entire thesis text is included in file. Typescript. Title from title screen of thesis/dissertation PDF file (viewed May 6, 2010) Includes bibliographical references (p. 22-23) and index (p.25).
2

Integrated analysis of liquid composite molding (LCM) processes

Xu, Liqun, January 2004 (has links)
Thesis (Ph. D.)--Ohio State University, 2004. / Title from first page of PDF file. Document formatted into pages; contains xix, 245 p.; also includes graphics. Includes bibliographical references (p. 233-245).
3

A study to determine a practical technology for manufacturing components made of a multiphase perfect material

Wang, Feng, January 2007 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2007. / Title proper from title frame. Also available in printed format.
4

Electrophoretic deposition of ferrite for on chip copper planar inductors /

Washburn, Cody. January 2006 (has links)
Thesis (M.S.)--Rochester Institute of Technology, 2006. / Typescript. Includes bibliographical references (leaves 102-103).
5

A Study of Building Materials and Processes and Their Influence on the Design and Construction of Contemporary Small Homes

Roberson, Fritz D. January 1950 (has links)
The purpose of this study is to make an investigation of the most common new building materials and to determine how their uses are changing the design of modern small home architecture.
6

Numerical investigation of field-scale convective mixing processes in heterogeneous, variable-density flow systems using high-resolution adaptive mesh refinement methods

Cosler, Douglas Jay, January 2006 (has links)
Thesis (Ph. D.)--Ohio State University, 2006. / Title from first page of PDF file. Includes bibliographical references (p. 169-180).
7

Zařízení pro monitorování degradačních procesů u materiálů živočišného původu / Monitoring equipment of degradation processes for material of animal origin

Chmelař, Vít January 2019 (has links)
The diploma thesis introduces the reader to the problems of chemical sensors and the basics of degradation processes in materials of animal origin. It describes some types of sensors and their principles. Atmel ATmega328 microprocessor, its parameters and programming are described. In the next part of the thesis there is a proposal and production of equipment for monitoring of degradation processes in materials of animal origin. Sample sof chicken and milk were mesuared. From these measurements, the gas concentration values were determined, where samples can be considered suitable for consumation.
8

Etude du procédé d'expansion à froid des alésages au sein des structures aéronautiques en métaux durs / Study of the cold expansion process in hard metal aeronautical structures

Achard, Victor 27 September 2016 (has links)
Ces travaux de thèse ont pour objectif de contribuer au développement de procédés innovants pour les assemblages contenant des métaux durs. Le procédé d’expansion à froid, dont l’efficacité a été prouvée à de nombreuses reprises sur les alliages d’aluminium et dont les qualités sont nombreuses, a attiré notre attention. L’objectif de la thèse est d’apporter des éléments de réponse quant à l’intérêt de l’utilisation du procédé d’expansion au sein des métaux durs, mesuré notamment par son impact sur la performance en fatigue. Plus généralement, il s’agit de comprendre son fonctionnement et son mode d’action au sein de ces alliages à hautes performances. Dans les travaux réalisés, les challenges scientifiques et techniques s’articulent autour de plusieurs thématiques d’étude. Des essais expérimentaux ont été effectués en vue de prouver la faisabilité du procédé mais aussi de mesurer de son impact sur la tenue fatigue d’alésages en alliages de titane (Ti-6Al-4V), en acier inoxydables à durcissement structural (15-5PH) mais aussi en superalliages à base Nickel (Inconel 718). L’efficacité du procédé a été prouvée et les gains apportés par la technologie sont importants. D’un autre côté, la problématique de la détermination des champs résiduels en bord de trou reste un réel défi pour la communauté intéressée par l’expansion à froid. La considération cette fois-ci des métaux durs apporte un degré supplémentaire de nouveauté et d’inconnu. La méthodologie générale employée réside dans la considération d’études numériques et expérimentales afin d’étudier la réponse des métaux durs à l’expansion à froid. Des modèles éléments finis axisymétriques ont été développés en vue de simuler le procédé complet d’expansion à froid réalisée au sein d’alésages et d’empilages de divers métaux durs. Les résultats numériques fournis ont été mis en parallèle avec ceux issus de mesures expérimentales, telles que la méthode du trou incrémental. Le but étant ainsi d’obtenir les cartographies les plus fiables possibles des contraintes résiduelles triaxiales générées en bord de trou mais aussi de rechercher de stratégies d’optimisations du procédé / This thesis aims to contribute to the development of innovative processes for mechanical components made of hard metals (Titanium, steels and superalloys). In the aeronautical field, the design of ever more efficient and reliable structures remains a technical challenge. In mechanical assemblies, hole edges are the seats of high stress concentrations and are a major risk site for crack initiation. To fight against this damage, manufacturing technologies such as cold expansion are widespread for aluminium applications but not for hard metal. The objective of this study is to provide answers concerning the impact of the cold expansion on the fatigue performance of holes and understand the mechanisms of the process in these high performance alloys. In the present work, the methodology proposed is to carry out both experimental and numerical studies of the response of hard alloy holes subjected to cold expansion. An extensive experimental campaign has been set up. It includes several materials (Ti-6Al-4V αβ and β annealed, 15-5PH & Inconel 718) and aims to test many parameters. The process has proved very effective on the fatigue performance in these high performance alloys. On the other hand, the main technical and scientific challenge lies in determining the stress fields generated within the material after cold expansion, especially in hard metals, the behaviour of which can be diverse and complex. The numerical modelling strategy chosen has led to the development of polyvalent axisymmetric models that are dedicated to simulation of the split sleeve process. Experimental and numerical results were compared using various methodologies, such as the incremental hole drilling technique. Measurements have validated the finite element simulations, with the purpose of mapping the residual fields in the expanded metallic section and the proposal of optimisation techniques.

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