Search for dissertations about: "finite element analysis of fatigue"
Showing result 21 - 25 of 63 swedish dissertations containing the words finite element analysis of fatigue.
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21. Modelling of cyclic and viscous behaviour of pearlitic steels. Application to tread braked railway wheels
Abstract : Railway wheel and rail materials are subjected to very high stresses and, in some cases, also elevated temperatures. The rolling contact loading results in a multiaxial stress state with a combination of compression and shear. READ MORE
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22. Towards enhanced mechanical braking systems for trains. Thermomechanical capacity of wheel treads at stop braking
Abstract : Modern trains are equipped with different braking systems, between which the braking effort can be distributed. Among these, tread braking is still the most common system for friction braking. Tread brake systems are cheap and robust. READ MORE
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23. On improvement of cast iron brake discs for heavy vehicles
Abstract : Disc brakes are commonly used in motorcycles, passenger cars, commercial vehicles, heavy-duty vehicles, passenger trains and landing gears of airplanes. Depending on the application, a wide variety of brake discs have been developed, with a multitude of designs, geometries and materials. READ MORE
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24. Rolling Contact Fatigue of Railway Rails with Emphasis on Crack Initiation
Abstract : Increased traffic density and the heavier axle loads of modern trains have led to severe problems with rolling contact fatigue (RCF) which cause initiation of surface cracks in railheads. In this thesis, a specific type of surface crack, the head check, is studied numerically with emphasis on fatigue crack initiation. READ MORE
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25. Modeling and Testing of Insulation Degradation due to Dynamic Thermal Loading of Electrical Machines
Abstract : Electrical machines in electrified vehicles are subjected to dynamic loadings at different driving conditions, which results in dynamic temperatures. The aging of the Electrical Insulation System (EIS) in electrical machines is caused by these dynamic temperatures, namely high average temperatures and temperature cycles. READ MORE