Sökning: "contact fatigue"
Visar resultat 31 - 35 av 128 avhandlingar innehållade orden contact fatigue.
31. High Strain Fatigue Crack Growth and Crack Closure
Sammanfattning : Understanding of the growth of fatigue cracks is of utmost importance since such growth often has a profound influence on the life of components subjected to cyclic loading. Thus, reliable fatigue life models enable a more efficient use of materials and improve the performance and efficiency in many applications. LÄS MER
32. Thermo-mechanical Fatigue Crack Propagation in Inconel 718
Sammanfattning : Thermo-mechanical fatigue crack propagation in Inconel 718 has been studied with different methods. In-situ observations with a scanning electron microscope (SEM) were performed, the crack propagation process was followed cycle by cycle and the influences from load, temperature, and microstructure on the crack growth were analyzed. LÄS MER
33. On fatigue crack growth modelling of surface initiated rolling contact fatigue using the asperity point load mechanism
Sammanfattning : Load transfer in applications or between machine components is generally achieved through contact. In case of recurrent high contact loads in combination with a rolling motion, i.e. with a relatively small amount of slip, the contact surface may eventually suffer from rolling contact fatigue (RCF). LÄS MER
34. Electron beam melting: Impact of part surface properties on metal fatigue and bone ingrowth
Sammanfattning : AbstractThe aim of this thesis is to investigate aspects on how additive manufacturing (AM) contributes to functional bone implants with the use of the electron beam melting (EBM) technology. AM manufactures parts according to computer-aided design, and the EBM technology melts powder using an electron beam, which acts similar to a laser beam. LÄS MER
35. Dynamic Train-Turnout Interaction – Mathematical Modelling, Numerical Simulation and Field Testing
Sammanfattning : Two models for simulation of dynamic interaction between train and turnout are developed. The first one is derived using a commercial software for dynamics of multi-body systems. LÄS MER