Search for dissertations about: "roughness"

Showing result 1 - 5 of 394 swedish dissertations containing the word roughness.

  1. 1. Scale dependency, hetrogeneity and anisotropy of surface roughness of rock fractures

    University dissertation from Institutionen för anläggning och miljö

    Author : Nader Fardin; KTH.; [2001]
    Keywords : Rock fracture; Roughness; Heterogeneity; Anisotropy; Fractals; Stationarity; Roughness length method; Statistical analysis; Erroranalysis; 3D-laser scanning;

    Abstract : .... READ MORE

  2. 2. Modelling of wheel/rail interaction considering roughness and discrete irregularities

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Astrid Pieringer; [2008]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; roughness; non-Hertzian contact; railway noise; vertical wheel rail interaction; time domain; discrete irregularities;

    Abstract : The interaction between wheel and rail is the predominant source of noise emission from railway operations in a wide range of conventional speeds. On the one hand, this wheel/rail noise concerns rolling noise and impact noise caused by the vertical interaction excited by roughness and discrete irregularities of the wheel/rail running surfaces, respectively. READ MORE

  3. 3. Vehicle Disc Brake Roughness Noise Experimental Study of the Interior Noise andVibro-Acoustic Modelling of Suspension Systems

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Eskil Lindberg; KTH.; [2011]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; acoustics; disc brake; surface topography; wire brush noise; roughness noise; component mode synthesis; vehicle suspension;

    Abstract : Prediction of vehicle disc brake roughness noise is a non-trivial challenge. In fact, neither the source mechanisms, nor the transfer paths are so far well understood. READ MORE

  4. 4. Characterization of Different Interface Types for HVDC Extruded Cable Applications

    University dissertation from ; Chalmers tekniska högskola; Gothenburg

    Author : Espen Doedens; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; polymer surfaces; cable peelings; HVDC; Roughness; Charge injection; XLPE; Field enhancement factors; Schottky injection; DC breakdown; Voltage decay; interfaces; Fowler-Nordheim injection; extruded cable; Roughness assisted charge injection.; Charge decay;

    Abstract : In extruded HVDC cable systems a variety of interface types can be found, and the interfacial properties depend on the application within the system. Such applications can be joints, terminations or the cable itself and they will all have different material combinations and manufacturing methods. READ MORE

  5. 5. On the bone response to different implant textures. A 3D analysis of roughness, wavelength and surface pattern of experimental implants

    University dissertation from Göteborg

    Author : Carin Hallgren Höstner; Göteborgs universitet.; Gothenburg University.; [2001]
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Surface modification; surface texture; roughness; surface evaluation; in vivo studies.;

    Abstract : PurposeThe purpose of the present thesis was to investigate the bone response to different isotropic, anisotropic and organised surface patterns.Material and methodsImplant surfaces have been modified with different techniques (abrasive blasting, turning, milling, photolithography or laser ablation). READ MORE