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Hittade 5 uppsatser som matchar ovanstående sökkriterier.

  1. 1. Thermo-Mechanical Fatigue Assessment of Marine Boiler : Using linear Finite Element Analyses

    Magister-uppsats, Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Författare :Adefemi Samuel Alagbada; [2020]
    Nyckelord :Marine Boiler; FEA; Thermo-mechanical Loading; LEFM; Paris law; Flaws; RAO.;

    Sammanfattning : This thesis is on fatigue crack growth assessments of a thermomechanical loaded Marine Boiler- Sunrod CPDB12. The installation position of the marine boiler in the ship in relation to its fatigue life under mode 1 loading is investigated. LÄS MER

  3. 2. Influence of nitrocarburization on the thermomechanical fatigue properties of ductile iron for exhaust components : Analysis and comparisons of TMF-properties

    Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Karl Larsson; [2019]
    Nyckelord :Thermo-mechanical fatigue; low cycle fatigue; thermal strain; ductile cast iron; nitrocarburizing;

    Sammanfattning : New stricter environmental legislation requires lower emissions and fuel consumption of automotive engines. Therefore the fuel efficiency must be increased but this leads to higher loads in the engine. As for the exhaust system it is affected by higher thermomechanical loads. LÄS MER

  4. 3. Material parameter study for aheavy-vehicle exhaust manifoldusing the finite element method : to increase component lifetime and decrease its environmental impact

    Master-uppsats, Linköpings universitet/Konstruktionsmaterial

    Författare :David Ek; [2019]
    Nyckelord :Thermomechanical fatigue; TMF; material parameter study; finite element method; FEM;

    Sammanfattning : The thesis originates from a need to meet stricter environmental regulations for Scania, to reduce fuel consumption and emission from heavy-vehicles. Scania aims to fulfil these requirements by increasing combustion pressure and temperature. These conditions are tougher for the engine components and they shorten their lifetime. LÄS MER

  5. 4. Software Benchmark and Material Selection in an Exhaust Manifold : Thermo-mechanical fatigue simulation of an exhaust manifold in AVL Fire M

    Master-uppsats, Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Författare :Oskar Rombo; [2018]
    Nyckelord :thermomechanical fatigue; TMF; simulation; viscoplastic;

    Sammanfattning : Today, there is a great focus on downsizing the engines, this means that the engines are made smaller in size but retain the same power. This in combination with the drive to increase the power of the engines has led to the engine components being exposed to high thermal loads. Today’s engines also use very high cylinder pressure. LÄS MER

  7. 5. Termomekanisk utmattning av Sanicro 25 : Materialmodellering med finita elementmetoden

    Kandidat-uppsats, Linköpings universitet/Fluida och mekatroniska system

    Författare :Marcus Karjalainen; David Klarholm; [2014]
    Nyckelord :Abaqus; FEM; TMF; material modeling; creep; Sanicro 25; Abaqus; FEM; TMF; materialmodellering; kryp; Sanicro 25;

    Sammanfattning : The report aims to describe the austenitic stainless steel Sanicro 25 from a thermomechanical point of view. The thermal and mechanical properties of the material make it suitable for use in coal – and thermal power plants. LÄS MER