Essays about: "TMF"

Showing result 1 - 5 of 18 essays containing the word TMF.

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

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

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

    Abstract : 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. READ MORE

  2. 2. Effect of dwell time on stress intensity factor of ferritic steel for steam turbine applications

    University essay from Linköpings universitet/Mekanik och hållfasthetslära

    Author : Ahmed Azeez; [2018]
    Keywords : ;

    Abstract : In the transition from conventional to green energy production resources, steam turbines are used to satisfy the lack of energy during peaks in the demand times and the limited access of renewable resources. This type of usage for steam turbines makes them operate on a flexible schedule, which leads to unpredictable issues related to shorter component life and faster crack propagation. READ MORE

  3. 3. Crack propagation calculations in non-elastic metals

    University essay from Luleå tekniska universitet/Material- och solidmekanik

    Author : Máren Ingá Baer; [2018]
    Keywords : crack propagation; fracture mechanics;

    Abstract : It is important to know the lifespan of a component, thus services can be planed. At Siemens Industrial Turbomachinery AB (SIT AB) develop and produce gas and steam turbines, the turbines are heavily strained by thermal and centrifugal forces during their life span which lead to cracking. READ MORE

  4. 4. Influence of Nitrocarburization on Thermo-Mechanical Fatigue Properties : Material Characterization of Ductile Cast Iron for Exhaust Components

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Author : Wännman Sofia; [2018]
    Keywords : Ductile cast iron; Nitrocarburizing; Thermo-mechanical fatigue;

    Abstract : The large number of vehicles operating on the roads cause high emissions and consequently a negative effect on the environment. When developing and optimizing internal combustion engines, certain requirements must be considered, which are environmental regulations, reduced fuel consumption and increased specific power. READ MORE

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

    University essay from Karlstads universitet/Institutionen för ingenjörsvetenskap och fysik (from 2013)

    Author : Oskar Rombo; [2018]
    Keywords : thermomechanical fatigue; TMF; simulation; viscoplastic;

    Abstract : 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. READ MORE