Sökning: "angularity"

Visar resultat 1 - 5 av 7 avhandlingar innehållade ordet angularity.

  1. 1. Geometry, Mechanics and Transmissivity of Rock Fractures

    Författare :Flavio Lanaro; KTH; []
    Nyckelord :anisotropy; angularity; anti-persistence; aperture; channelling; closure; contact area; contact mechanics; cross-correlation; deformability; dilation; flow; fractals; fracture; joint; laboratory; modelling; normal loading; persistence; power spectra; ;

    Sammanfattning : .... LÄS MER

  3. 2. Physical characterization of coarse clasts with 3D image-analysis method : development, evaluation and application

    Författare :Solomon Tafesse; Joanne Fernlund; Mark Johnson; KTH; []
    Nyckelord :3D image analysis; Particle angularity; Sieve analysis; Particle form; Gravel analysis; Repeatability; Lithological distribution;

    Sammanfattning : This thesis presents a novel three dimensional (3D) image-analysis method for characterizing the physical characteristics of coarse particles in the field, and introduces new methodology for the total analysis of glacial till samples.The novel image analysis method, called the GID method, is capable of determining the size, shape and surface texture of each individual clast analysed. LÄS MER

  4. 3. Discrete element technique for modeling high-speed railway tracks

    Författare :Alireza Ahmadi; Stefan Larsson; Carl Wersäll; Liang Cui; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Polygonal particles; Direct shear test; Particle scaling; Bal- lasted track; DEM; Polygonala partiklar; direkt skjuvförsök; partikelskalning; ballastspår; DEM; Soil and Rock Mechanics; Jord- och bergmekanik;

    Sammanfattning : The Discrete element method (DEM) is a methodology to investigatethe interactions among granular materials. It analyzes the behavior of par-ticulate environments by solving force-displacement equations that adhereto Newton’s second law of motion. LÄS MER

  5. 4. Evaluation and modeling of the flow in a slotted wall wind tunnel

    Författare :Emil Ljungskog; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CFD Simulations; Ground Simulation; Uncertainty Quantification; Wind Tunnel; Tangential Blowing; Flow Uniformity; Slotted Walls;

    Sammanfattning : As vehicle manufacturers strive to shorten the development time of new models, an increasing share of the aerodynamic development work is shifted from wind tunnel testing of prototype vehicles to numerical simulations of virtual models. However, comparing measurements from the wind tunnel with numerical simulation data is not straightforward due to several interference effects occurring between the wind tunnel and the tested vehicle. LÄS MER

  7. 5. Effect of Physical Weathering on Mechanical Properties of Tailings

    Författare :Juan Rodriguez; Kauko Kujala; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Geoteknik; Soil Mechanics;

    Sammanfattning : The mining activity produces minerals to supply to the modern society with commodities. During the ore refining process large amounts of tailings are generated as waste. Tailings are the result of crushing and wet milling, typically in the size range of sand to silt and angular in shape. LÄS MER