Essays about: "Very high cycle fatigue"

Showing result 1 - 5 of 7 essays containing the words Very high cycle fatigue.

  1. 1. Life and fracture in very high cycle fatigue of a high strength steel

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

    Author : Daniel Karlsson; [2021]
    Keywords : Very high cycle fatigue; VHCF; Fractography; Fine granular area; FGA; High strength tool steel; Ultrasonic testing equipment;

    Abstract : Classical fatigue models teach that there is an intrinsic fatigue limit for steels, representing a level of stress that is too low for regular crack growth where every cyclic load propagates a fatigue crack through the material. Modern application with extreme lifetimes has shown that fatigue will still take place in steels with stress levels well below the expected fatigue limit. READ MORE

  3. 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

  4. 3. 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

  5. 4. Minimizing Cooling Time for Diamond Anvil Cell Under High Pressure

    University essay from Lunds universitet/Mekanik

    Author : Martin Edung; [2017]
    Keywords : Diamond Anvil Cell; FEA; FEM; Structural; Transient; Temperature; Ansys; Ansys WB; Machine Drawings; ESS; European Spallation Source; Technology and Engineering;

    Abstract : The main goal of the project was to decrease the cooling time of a diamond anvil cell (DAC) by modifying an existing design. Modifications included change of materials, overall dimensions and a significant reduction of mass together with additional suggestions for decreased cool time. READ MORE

  6. 5. Fan Blade Vibrations in Synchronous Machines

    University essay from KTH/Energiteknik

    Author : Oskar Jonsson; [2016]
    Keywords : ;

    Abstract : The design of a fan structure should be made in relation to both an aerodynamic aspect as well as a structural point of view to avoid both self-excited vibrations and forced response. If the blades start to vibrate it can cause high cycle fatigue until they break and cause severe damage. READ MORE