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Assessment of fatigue crack paths in single crystals from turbine blades

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Assessment of fatigue crack paths in single crystals from turbine blades

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dc.contributor.advisor León Martínez, Vicente es_ES
dc.contributor.advisor Castelluccio, Gustavo es_ES
dc.contributor.author López Canós, Samuel Francesc es_ES
dc.date.accessioned 2020-06-01T12:00:58Z
dc.date.available 2020-06-01T12:00:58Z
dc.date.created 2018-09-05
dc.date.issued 2020-06-01 es_ES
dc.identifier.uri http://hdl.handle.net/10251/144749
dc.description.abstract [EN] Fatigue failures in turbine blades are a pervasive, unresolved economic and safety problem that is leading the structural integrity concern in both Civil and Military Aerospace engines. The high temperatures and the harmful operating environment that blades face in service coupled with the anisotropy of the single crystal nickel-based superalloys converts the fatigue analysis of a turbine blade into an even more intricate matter. As a result, it is necessary to simplify the problem and analyse it under controlled conditions. In an attempt to contribute to the aforementioned, this project explores the change in orientation that fatigue cracks undergo as they grow in notched single crystals. The analysis involves the calculation of the shear stresses resolved on the slip systems as well as the detection of single slip or multislip regions along the crack path. Two models have been created to address the problem: a simplified model without growing the crack and a more complex model growing the crack. Results are provided as i) the evolution of the shear stresses resolved on the slip planes along the crack path (RSS graph) and ii) the fluctuation of Q factor along the crack path (Q factor graph). The simultaneous analysis of both explains the crack path deviations. However, no single slip regions have been found among the specimens analysed due to the low cycle fatigue testing condition. The findings and recommendations of this project may be used to optimise blade design and eventually predict crack path. es_ES
dc.description.abstract [ES] Este proyecto investiga los cambios en los campos de tensiones y deformaciones a medida que las grietas se propagan en aleaciones monocristalinas por medio de simulaciones con el código de elementos finitos Abaqus. La orientación de los cristales así como la probabilidad de cambiar el camino de grieta con el tamaño de la grieta son analizados. es_ES
dc.format.extent 54 es_ES
dc.language Inglés es_ES
dc.publisher Universitat Politècnica de València es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Monocristales es_ES
dc.subject Fatiga es_ES
dc.subject Orientación cristalina es_ES
dc.subject Sistemas de deslizamiento es_ES
dc.subject Single crystals es_ES
dc.subject Fatigue es_ES
dc.subject Crystallographic Orientation es_ES
dc.subject Slip Systems es_ES
dc.subject.classification INGENIERIA ELECTRICA es_ES
dc.subject.other Máster Universitario en Ingeniería Aeronáutica-Màster Universitari en Enginyeria Aeronàutica es_ES
dc.title Assessment of fatigue crack paths in single crystals from turbine blades es_ES
dc.title.alternative Estudio de la propagación de grietas por fatiga en aleaciones monocristalinas de álabes de turbina es_ES
dc.type Tesis de máster es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Eléctrica - Departament d'Enginyeria Elèctrica es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingeniería del Diseño - Escola Tècnica Superior d'Enginyeria del Disseny es_ES
dc.description.bibliographicCitation López Canós, SF. (2018). Assessment of fatigue crack paths in single crystals from turbine blades. http://hdl.handle.net/10251/144749 es_ES
dc.description.accrualMethod TFGM es_ES
dc.relation.pasarela TFGM\91039 es_ES


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