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2022
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info:eu-repo/semantics/openAccess
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Universidad Nacional de Educación a Distancia (España), Universidad Politécnica de Madrid. Departamento de Ingeniería Mecánica
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Resumen
El presente trabajo de investigación pretende proponer un gemelo digital para la predicción del comportamiento y fallo de componentes de fabricación aditiva, atendiendo a las características de las heterogeneidades intrínsecas en la pieza, principalmente porosidades, que aparecen durante el proceso de fabricación de las mismas. Por tanto, la metodología propuesta consiste en la construcción de un modelo MEF basado en CT, así como en el estudio de las características de porosidad obtenidas por CT y su repercusión en la predicción del fallo del componente me-diante el modelo MEF. Para ello, se fabrican una serie de probetas de tracción mediante L-PBF, según la norma ASTM E8/E8M. Posteriormente, se realiza la digitalización y el análisis de las mismas mediante CT. Finalmente, se modelizan dichas probetas mediante MEF y los resultados obtenidos se contrastan con los ensayos experimen-tales de tracción. Asimismo, se analizan casuísticas virtuales para evaluar su influencia utilizando el modelo pro-puesto.
This work aims to present a digital-twin for prediction of the mechanical behavior and failure of additive manufacturing components, considering the characteristics of heterogeneities, mainly porosities, which appear during the manufacturing process. Therefore, the proposed methodology is based on the development of a CT-based FEM model, as well as the study of different porosity features by CT analysis and FEM modelling. Their influence on predictions is also evaluated. To this end, tensile test specimens were manufactured by means of L-PBF, according to ASTM E8/E8M. Afterwards, the analysis and digitalization of each specimen were carried out using CT, followed by FEM modelling of each one. Finally, the results obtained by the analysis were correlated with experimental tensile tests. Taking advantage of the virtual model proposed, virtual cases and hypothesis were also analyzed. Hence, the promising future of the proposed methodology is highlighted.
This work aims to present a digital-twin for prediction of the mechanical behavior and failure of additive manufacturing components, considering the characteristics of heterogeneities, mainly porosities, which appear during the manufacturing process. Therefore, the proposed methodology is based on the development of a CT-based FEM model, as well as the study of different porosity features by CT analysis and FEM modelling. Their influence on predictions is also evaluated. To this end, tensile test specimens were manufactured by means of L-PBF, according to ASTM E8/E8M. Afterwards, the analysis and digitalization of each specimen were carried out using CT, followed by FEM modelling of each one. Finally, the results obtained by the analysis were correlated with experimental tensile tests. Taking advantage of the virtual model proposed, virtual cases and hypothesis were also analyzed. Hence, the promising future of the proposed methodology is highlighted.
Descripción
Categorías UNESCO
Palabras clave
CT, MEF, Fabricación Aditiva, Porosidad
Citación
Centro
E.T.S. de Ingenieros Industriales
Departamento
Mecánica