Sökning: "fe a"

Visar resultat 1 - 5 av 631 uppsatser innehållade orden fe a.

  1. 1. Chemical Stabilization of Arsenic in Contaminated Soil under Low Redox Conditions

    Master-uppsats, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Eva Smedborn Pausson; [2019]
    Nyckelord :;

    Sammanfattning : Remediation techniques for arsenic contaminated soil have previously focused mostly on the surface soil layers where aerobic conditions are prevalent. In this master thesis, chemical stabilization by adding zero-valent iron (Fe(0)) and calcium oxide (CaO) to an arsenic-contaminated soil under low redox conditions have been studied through up-flow percolation tests. LÄS MER

  2. 2. Metamodelling of a Finite Element Analysis of a Drilling Process with Replaceable Inserts

    Magister-uppsats, Högskolan i Skövde/Institutionen för ingenjörsvetenskap

    Författare :Samy Akrouh Ettaghadouini; [2019]
    Nyckelord :drilling; speed; feed; CAD; FEM; simulations; metamodel; neural network; optimization;

    Sammanfattning : The aim of this project is to create a metamodel from a drilling tool with replaceable inserts from FEA of the machining process using MATLAB and ABAQUS. This report contains research in drilling and in metamodeling using neural networks and the work from the design of the CAD, through FEA and simulations, to the metamodeling, excluding the optimization. LÄS MER

  3. 3. Extraction of tool reaction forces using LS-DYNA and its use in Autoform sheet metal forming simulation

    Uppsats för yrkesexamina på avancerad nivå, Blekinge Tekniska Högskola/Institutionen för maskinteknik

    Författare :Esbjörn Zachén; [2019]
    Nyckelord :Sheet Metal Forming; Stamping Die; blank holder; Structural Analysis; Finite Element Simulation;

    Sammanfattning : In product development there is still potential to decrease lead times with faster and more accurate simulations. The objective of this thesis was to study whether Finite Element (FE) simulations using explicit LS-DYNA to extract reaction forces from sheet metal forming tools during forming, could be used to improve existing FE models in sheet metal forming software AutoForm. LÄS MER

  4. 4. Mineralogical and Geochemical characterization of the Fe-Cu-Occurrence and associated Hanging wall and Footwall Alteration halo of the Viscaria D-Zone, Kiruna District, Northern Sweden

    Master-uppsats, Luleå tekniska universitet/Geovetenskap och miljöteknik

    Författare :Madelen Estholm; [2019]
    Nyckelord :Alteration halo;

    Sammanfattning : Northern Norrbotten County is one of the three major ore producing districts in Sweden. Based on the predominance of epigenetic Cu-Au and Fe-oxide mineralization this region is regarded as a typical IOCG province. The massive to layered Viscaria Cu-deposit is proposed to be a VMS deposit of Besshi-type and is unique in deposit type of the region. LÄS MER

  5. 5. Fosforsorptionskapaciteten i djupa jordlager : En kemisk analys av fosforadsorption i svenska grus- och sandjordar

    Kandidat-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik; KTH/Hållbar utveckling, miljövetenskap och teknik

    Författare :Charlotte Ekstrand; Camilla Hamberg; [2019]
    Nyckelord :phosphorus; phosphate; oxalate; pyrophosphate; eutrophication; adsorption; ICP; AutoAnalyzer; fosfor; fosfat; oxalat; pyrofosfat; eutrofiering; adsorption; ICP; AutoAnalyzer;

    Sammanfattning : Det största hotet mot våra vattenmiljöer idag är eutrofieringen - överskottet av näringsämnen orsakat av avlopp och jordbruk. För att motverka detta krävs mer kunskap kring uppträdandet av fosfor i jord och, mer specifikt, fosforsorptionskapaciteten i sand- och grusjordar. LÄS MER