Sökning: "material instability"

Visar resultat 11 - 15 av 143 avhandlingar innehållade orden material instability.

1. 11. Drum Brake Squeal

   Författare :Johan Hultén; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; friction induced; squeak; vibration; drum brake; squeal; instability; self-excited; noise;

   Sammanfattning : Drum brake squeal is a common discomfort. The main goal of this thesis is to investigate the mechanisms that generate drum brake squeal and to create a base for the search for solutions. A series of steps towards the understanding of these mechanisms are taken. Firstly, a simple model for friction-induced vibration is presented. LÄS MER

3. 12. On the Modeling of Porous Media with Emphasis on Localization

   Författare :Jonas Larsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; embedded band; material instability; bifurcation; FEM; softening plasticity; consolidation; shear band; porous media; localization;

   Sammanfattning : The mechanics of porous media is nowadays relevant in a broad spectrum of engineering applications. In the case of geomaterials, the description of the mechanical behavior is complicated by the fact that the deformation characteristics involve (strain) localization, which is indeed the main topic of this thesis. LÄS MER

4. 13. Shoulder instability : a clinical and MRI-based analysis

   Författare :Björn Salomonsson; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :Shoulder instability; Shoulder instability classification; Shoulder arthroscopy; MRI; MR-arthography; Shoulder instability surgery; Shoulder instability assessment; Outcome instruments;

   Sammanfattning : Shoulder instability is a common but complex and challenging area of shoulder pathology, and new diagnostic methods and treatments are continuously developed. We conducted this study to evaluate the clinical outcome of shoulder instability with respect to different diagnostic possibilities and surgical treatments. LÄS MER

5. 14. Assessment and improvements of thermal-hydraulic correlations and methods for the analysis of the Jules Horowitz Reactor

   Författare :Alberto Ghione; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Flow instability; Uncertainty; Narrow channels; Jules Horowitz Reactor; Safety analysis; Critical heat flux; Thermal-hydraulic correlations; Heat transfer; Best-Estimate; Material Testing Reactor;

   Sammanfattning : Nuclear research reactors are used to test materials for current and future nuclear technologies, and to produce radioisotopes for medical purposes. Most of the existing Material Testing Reactors in Europe have operated for more than 50 years and new ones are needed. LÄS MER

7. 15. Development of titanium-copper alloys for dental applications

   Författare :Lee Fowler; Caroline Öhman-Mägi; Håkan Engqvist; Susanne Norgren; Eduard Hryha; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Titanium; copper; antibacterial; Ti2Cu; biomaterials; Staphylococcus epidermidis; MC3T3 cells;

   Sammanfattning : Titanium alloys find wide application in the medical implants industry, which includes areas of orthopaedic and dental implants. The reason for the popularity of the material is high mechanical strength, low density, and reported growth of bone onto the material, as well as corrosion resistance. LÄS MER