TY - CHAP A1 - Urbano, Jose A1 - Golowin, Andrej A1 - Löhnert, Stefan A1 - Bestle, Dieter T1 - Mechanical Integrity of Steel Discs with Corrosion Pits T2 - 12th International Fatigue Congress (FATIGUE 2018), Poitiers Futuroscope, France, May 27-June 1st, 2018 N2 - Currently, prediction of crack initiation by corrosion pits is only possible by assuming regular geometrical shapes, such as semi-spheres or semi-ellipsoids. Moreover, typical fatigue life diagrams associate the crack initiation life with geometrical features, such as pit depth or aspect ratio, often leading to unsatisfactory correlations due to high pit shape variability and data scatter. In the context of blade-disc fixation in aero engine turbines, this limitation translates into highly conservative life estimations. Therefore, a new crack initiation predictor is formulated based on experimental testing and numerical analysis of 28 artificial corrosion pits. A low-cycle fatigue test campaign is conducted using three-point bending test specimens to simulate maximum takeoff operation conditions of the aero engine and the associated loading of the blade root designed as firtree. An artificial pit is located at the critical point of each test specimen, respectively. The prediction criterion is based on finite element analysis and is formulated as the lowest plastic strain of a plastic region with a certain volume in the corrosion pit. This reference volume is varied until an optimum correlation with experimental crack initiation life is obtained. The criterion shows a superior correlation with crack initiation life compared to pure geometrical parameters such as pit depth. Y1 - 2018 U6 - https://doi.org/10.1051/matecconf/201816504012 PB - EDP Sciences CY - Les Ulis ER - TY - THES A1 - Urbano Casuasango, Josè Mauricio T1 - Learning-Based Manufacturing Deviation Estimation for Robust Computer-Aided Design Y1 - 2023 SN - 978-3-8440-8904-2 PB - Shaker CY - Düren ER - TY - GEN A1 - Urbano, Josè A1 - Bestle, Dieter A1 - Gerstberger, Ulf A1 - Flassig, Peter Michael T1 - Low-Order Representation of Manufacturing Variations Based on B-Spline Morphing T2 - ASME 2019 International Mechanical Engineering Congress and Exposition, November 11–14, 2019 Salt Lake City, Utah, USA Y1 - 2020 UR - https://asmedigitalcollection.asme.org/IMECE/proceedings-abstract/IMECE2019/59384/V02BT02A053/1072900 SN - 978-0-7918-5938-4 U6 - https://doi.org/10.1115/IMECE2019-10294 PB - American Society of Mechanical Engineers ER -