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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

Computational material design : diluted magnetic semiconductors for spintronics /

Huang, Lunmei, January 2007 (has links)
Diss. (sammanfattning) Uppsala : Univ., 2007. / Härtill 8 uppsatser.
2

Magnetic and Structural Properties of f-electron Systems from First Principles Theory

Björkman, Torbjörn, January 2009 (has links)
Diss. (sammanfattning) Uppsala : Uppsala universitet, 2009. / Härtill 8 uppsatser.
3

"Today´s problems of using wood as a construction material"

Kobza, Milos January 2007 (has links)
<p>This work contains problems of using wood as a construction material nowadays, mainly in the Czech Republic. In the work are mentioned several factors, which are affecting people´s decision for using wood as a structural material from the point of views like: economical, ecological, fire resistance, durability, load carrying, thermal insulating, architectonical, etc. There affecting factors are desribed and fulfilled with examples. The necessary information to complete this work was gathered from boos, websites, cooperation and communication with companies and teachers from various schools.</p>
4

"Today´s problems of using wood as a construction material"

Kobza, Milos January 2007 (has links)
This work contains problems of using wood as a construction material nowadays, mainly in the Czech Republic. In the work are mentioned several factors, which are affecting people´s decision for using wood as a structural material from the point of views like: economical, ecological, fire resistance, durability, load carrying, thermal insulating, architectonical, etc. There affecting factors are desribed and fulfilled with examples. The necessary information to complete this work was gathered from boos, websites, cooperation and communication with companies and teachers from various schools.
5

On Material Modelling of High Strength Steel Sheets

Larsson, Rikard January 2012 (has links)
The work done in this thesis aims at developing and improving material models for use in industrial applications. The mechanical behaviour of three advanced high strength steel grades, Docol 600DP, Docol 1200M and HyTens 1000, has been experimentally investigated under various types of deformation, and material models of their behaviour have been developed. The origins of all these material models are experimental findings from physical tests on the materials. Sheet metal forming is an important industrial process and is used to produce a wide range of products. The continuously increasing demand on the weight to performance ratio of many products promotes the use of advanced high strength steel. In order to take full advantage of such steel, most product development is done by means of computer aided engineering, CAE. In advanced product development, the use of simulation based design, SBD, is continuously increasing. With SBD, the functionality of a product, as well as its manufacturing process, can be analysed and optimised with a minimum of physical prototype testing. Accurate numerical tools are absolutely necessary with this methodology, and the model of the material behaviour is one important aspect of such tools. This thesis consists of an introduction followed by five appended papers. In the first paper, the dual phase Docol 600DP steel and the martensitic Docol 1200M steel were subjected to deformations, both under linear and non-linear strain paths. Plastic anisotropy and hardening were evaluated and modelled using both virgin materials, i.e. as received, and materials which were pre-strained in various material directions. In the second paper, the austenitic stainless steel HyTens 1000 was subjected to deformations under various proportional strain paths and strain rates. It was experimentally shown that this material is sensitive both to dynamic and static strain ageing. A constitutive model accounting for these effects was developed, calibrated, implemented in a Finite Element software and, finally, validated on physical test data. The third paper concerns the material dispersions in batches of Docol 600DP. A material model was calibrated to a number of material batches of the same steel grade. The paper provides a statistical analysis of the resulting material parameters. The fourth paper deals with a simple modelling of distortional hardening. This type of hardening is able to represent the variation of plastic anisotropy during deformation. This is not the case with a regular isotropic hardening, where the anisotropy is fixed during deformation. The strain rate effect is an important phenomenon, which often needs to be considered in a material model. In the fifth paper, the strain rate effects in Docol 600DP are investigated and modelled. Furthermore, the strain rate effect on strain localisation is discussed. / SFS ProViking Super Light Steel Structures
6

Designing and tuning the properties of materials by quantum mechanical calculations /

Souza de Almeida, Jailton, January 2006 (has links)
Diss. (sammanfattning) Uppsala : Uppsala universitet, 2006. / Härtill 16 uppsatser.
7

Non-collinear magnetism in d- and f-electron systems /

Lizárraga Jurado, Raquel, January 2006 (has links)
Diss. (sammanfattning) Uppsala : Uppsala universitet, 2006. / Härtill 12 uppsatser.
8

Effect of a material science course on the perceptions and understanding of teachers in Zimbabwe regarding content and instructional practice in design and technology /

Kwaira, Peter. January 2007 (has links) (PDF)
Thesis (Ph. D. Philosophy (Faculty of Education))--University of the Western Cape, 2007. / Includes bibliographical references (leaves 292-314).
9

Untersuchungen an biologischen Proben mit verschiedenen Raman- und SERS-spektroskopischen Techniken

Gessner, Ralph. January 1900 (has links) (PDF)
Würzburg, Univ., Diss., 2004. / Erscheinungsjahr an der Haupttitelstelle: 2003. Computerdatei im Fernzugriff.
10

Modeling and computer simulation of ion beam synthesis of nanostructures

Strobel, Matthias. January 1999 (has links) (PDF)
Dresden, Techn. Univ., Diss., 1999. / Computerdatei im Fernzugriff.

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