Sökning: "frictional resistance"
Visar resultat 1 - 5 av 19 avhandlingar innehållade orden frictional resistance.
1. The Enemy Below - Adhesion and Friction of Ship Hull Fouling
Sammanfattning : Below the waterline, commercial ships are good targets for marine organisms to attach and proliferate, a problem commonly known as biofouling. A fouled hull means higher hydrodynamic resistance, which can result in significant fuel penalties. LÄS MER
2. Electrical and Frictional Performance of Tin-Coated Contacts Exposed to Wear and Fretting Corrosion
Sammanfattning : The complexity of electronic systems in vehicles is rapidly increasing, and as a consequence, the long-term reliability of automotive connectors has become an important issue. The aims of this thesis have been: 1. to characterize the friction, wear and electrical properties of tin coatings, 2. LÄS MER
3. Synthesis, Characterization, and Evaluation of Ag-based Electrical Contact Materials
Sammanfattning : Ag is a widely used electrical contact material due to its excellent electrical properties. The problems with Ag are that it is soft and has poor tribological properties (high friction and wear in Ag/Ag sliding contacts). LÄS MER
4. Fiber push-out testing of sapphire fiber alumina matrix composites
Sammanfattning : A current area of international research and development concerns composite materials consisting of oxides reinforced with continuous oxide fibers. These materials have an inherent resistance to oxidation and therefore have potential as structural materials for applications at extremely high temperatures. LÄS MER
5. The Hydrodynamics of Waterjet/Hull Interaction
Sammanfattning : The objective of the present investigation is to explore the physics behind the waterjet/hull interaction, and in particular the negative thrust deduction often reported in the semi-planing speed range. Another objective is to propose a validated numerical technique for computing the hydrodynamics of waterjet-driven hulls. LÄS MER