Search for dissertations about: "contact length"

Showing result 1 - 5 of 169 swedish dissertations containing the words contact length.

  2. 1. Modelling Interfacial Details in Tyre/Road Contact — Adhesion Forces and Non-Linear Contact Stiffness

    Author : Patrik Andersson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rough surface; tyre dynamics; tyre road noise; adherence force; adhesion forces; tyre road interaction; dynamic contact; non-linear contact stiffness;

    Abstract : Rolling resistance, noise generation, and wear are all determined by the interaction process between the rolling automotive vehicle tyre and the road. A deep understandingof the interaction process is needed for optimisation aiming at reducing these effects. READ MORE

  4. 2. Investigation of Forces and Contact Area for Modelling Turning Processes

    Author : Ove Bayard; KTH; []
    Keywords : Modelling; turning processes; cutting forces; contact length; Quick Stop Device; QSD; simulation programs; FEM; predictive models.; NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : This thesis is focused on an investigation of forces andcontact area for modelling turning processes. The primary taskin short term research has been to take a first steptowards animproved model of the cutting process. READ MORE

  5. 3. Thermally stable electrical contacts to 6H silicon carbide

    Author : Nils Lundberg; Mikael Östling; Claude Jaussaud; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; I-V current -voltage ; C-V capacitance-voltage ; rectifying; ohmic; interface; silicide; carbide; epilayer; Schottky barrier height; current rectification ratio CRR ; specific contact resistivity; transmission line model TLM ; contact resistance; transfer length; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Silicon Carbide (SiC) are at present being developed for use in high temperature (≥ 500◦C) and high-power environments under which conventional semiconductors can hardly perform.  Thermally stable electrical contacts are essential to the ability of SiC to function under such extreme conditions. READ MORE

  6. 4. Rough surfaces in contact : artificial intelligence and boundary lubrication

    Author : Marco Rapetto; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Elements; Maskinelement;

    Abstract : Interacting surfaces are found in mechanical systems and components. Since engineered surfaces are not perfectly smooth, only a fraction of the nominal surface area is actually in contact. This fraction is denoted as the real area of contact, Ar, and is formed by the sum of the contact spots between the two touching surfaces. READ MORE

  7. 5. Analysis and Applications of Minimum Quantity Lubrication (MQL)

    Author : Bulent Tasdelen; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dry; compressed air; sliding; MQL; temperature; nozzle; oil amount; seizure; tool wear; tool-chip contact surface topography.; contact length;

    Abstract : One of the greatest obstacles to the implementation of MQL is “lack of knowledge” which also limits the expansion of its usage. The presented work aims to take a step toward a better understanding of the mechanisms that occur in MQL assisted machining. READ MORE