Search for dissertations about: "Short cracks"
Showing result 1 - 5 of 52 swedish dissertations containing the words Short cracks.
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1. Modelling and simulation of short fatigue cracks
Abstract : The growth of short fatigue cracks deviates from the behaviour of long fatigue cracks even if subjected to the same nominal driving force. The influence from the microstructure is pronounced, while crack closure effects may not be that important as for longer cracks. READ MORE
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2. Numerical Modelling of Short Fatigue Crack Growth
Abstract : Fatigue implies repeated loading and unloading of a structure, and components subjected to fatigue might experience nucleation of cracks, and subsequent crack propagation. This might lead to catastrophic consequences, such as complete failure of a structure. READ MORE
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3. Non-overlapping Germ-grain Models: Characteristics and Material Modelling
Abstract : We consider three different non--overlapping germ--grain models, two of which are constructed in a similar fashion. These two models are generalisations of Mat\'ern's hard--core models. In both cases we start with a homogeneous Poisson process and use the points as centres of convex sets, grains, of the same shape. READ MORE
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4. Mechanical behaviour of a roller bearing steel : Strength differential effect, low temperature creep and propagation of short cracks
Abstract : Fatigue cracks in bearings either initiate from the surface or from an inclusion below the rolling contact surface. Then, short cracks start to propagate. Short crack grow at considerably faster rates than long cracks subjected to a nominally equivalent stress intensity factor range. READ MORE
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5. Life prediction and mechanisms for the initiation and growth of short cracks under fretting fatigue loading
Abstract : Fretting fatigue is a damage process that may arise in engineering applications where small cyclic relative displacements develop inside contacts leading to detrimental effects on the material fatigue properties. Fretting is located in regions not easily accessible, which makes it a dangerous phenomenon. READ MORE