Sanhen, Nils-ErikNils-ErikSanhen2023-09-262023-09-262022-01-27Technische Universität Hamburg (2022)https://hdl.handle.net/11420/43417Welded joints are the most common method for connecting steel components, but they are also points of weakness, as they contain, among other things, initial cracks or are unwelded gaps. Most of the fatigue life of a welded joints takes place during the phase of macro crack growth, fracture mechanics models are therefore widely used method to predict the fatigue life. In this thesis, a procedure is developed how fracture mechanics simulations can be conducted automatically for a large number of welded joints with heterogeneous geometries. Therefore, an integrated procedure is developed in which parametric simulation models are generated, fracture mechanically analysed and the results together with their metadata are saved in a selectable master file. Then, the fatigue lives are calculated from the numerical results via the Paris-Erdogan equation and compared with the experimentally determined data. It is shown that by adapting the Paris-Erdogan parameters, high accuracy can be achieved in predicting fatigue lives under sub-zero temperatures. Moreover, a method is described in which a low effort verification of the Paris-Erdogan parameters C and m, separately from each other, by comparing numerical and experimental fatigue lives in a logarithmic space.enhttps://creativecommons.org/licenses/by/4.0/Negative Celsius temperaturesFatigue transition temperatureTemperature dependence of fatigue curvesFatigue testingWeldment fatigueFatigueEngineering and applied operationsMaster Thesis10.15480/882.862910.15480/882.8629Ehlers, SörenSörenEhlersvon Bock und Polach, Rüdiger Ulrich FranzRüdiger Ulrich Franzvon Bock und PolachBraun, MoritzMoritzBraunOther