Exploració per autor "Cervera Ruiz, Miguel"
Ara es mostren els items 104-123 de 137
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Recoater-induced distortions and build failures in selective laser melting of thin-walled Ti6Al4V parts
Lu, Xufei; Chiumenti, Michele; Cervera Ruiz, Miguel; Slimani, Mehdi; Gonzàlez, Iban (Multidisciplinary Digital Publishing Institute (MDPI), 2023-04)
Article
Accés obertAdditively manufactured thin-walled structures through selective laser melting (SLM) are of great interest in achieving carbon-neutral industrial manufacturing. However, residual stresses and warpages as well as recoater ... -
Reliability and cost efficiency of finite element methods for non-linear structural analysis
Oñate Ibáñez de Navarra, Eugenio; Barbat Barbat, Horia Alejandro; Cervera Ruiz, Miguel; Oliver Olivella, Xavier (1995)
Report de recerca
Accés obert -
Residual stress and distortion of rectangular and S-shaped Ti-6Al-4V parts by Directed Energy Deposition: modelling and experimental calibration
Lu, Xufei; Lin, Xin; Chiumenti, Michele; Cervera Ruiz, Miguel; Hu, Yunlong; Ji, Xianglin; Ma, Liang; Yang, Haiou; Huang, Weidong (Elsevier, 2019-03)
Article
Accés obertResidual stresses and distortion in Additive Manufactured (AM) parts are two key obstacles which seriously hinder the wide application of this technology. Nowadays, understanding the thermomechanical behavior induced by ... -
Residual stresses control in additive manufacturing
Lu, Xufei; Cervera Ruiz, Miguel; Chiumenti, Michele; Lin, Xin (MDPI, 2021-12)
Article
Accés obertResidual stresses are one of the primary causes for the failure of parts or systems in metal additive manufacturing (AM), since they easily induce crack propagation and structural distortion. Although the formation of ... -
Seismic evaluation of concrete dams via continuum damage models
Cervera Ruiz, Miguel; Oliver Olivella, Xavier; Carvalho Marques de Faria, Rui Manuel (Wiley, 1995-09)
Article
Accés obertIn this paper a general methodology for the analysis of large concrete dams subjected to seismic excitation is outlined. It is valid both for gravity dams (2D representation) and arch dams (3D representation). The method ... -
Shaped metal deposition processes
Agelet de Saracibar Bosch, Carlos; Lundbäck, Andreas; Chiumenti, Michele; Cervera Ruiz, Miguel (Springer, 2013-08)
Capítol de llibre
Accés restringit per política de l'editorialThe shaped metal deposition (SMD) process is a novel manufacturing technology which is similar to the multi-pass welding used for building features such as lugs and flanges on components. This innovative technique is of ... -
Simulación numérica del comportamiento no lineal de presas de hormigón ante acciones sísmicas
Galindo, M.; Oliver Olivella, Xavier; Cervera Ruiz, Miguel (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 1993)
Llibre
Accés obertSe desarrolla una herramienta basada en la utilización del diseño asistido por ordenador para el análisis numérico del comportamiento resistente de presas de hormigón. Al mismo tiempo, dicha herramienta se utiliza como ... -
Simulación numérica del comportamiento termo-mecánico de presas de HCR Parte II: Aplicación a la Presa de Rialb
Cervera Ruiz, Miguel; García Soriano, Julio (Universitat Politècnica de Catalunya, 2002)
Article
Accés obertSe presenta en este trabajo un procedimiento numérico para la simulación del proceso de construcción de presas de Hormigón Compactado con Rodillo (HCR). El método se aplica a la presa de Rialb, recientemente contruida en ... -
Simulación numérica del comportamiento termo-mecánico de presas de HCRP Parte I: Modelización y calibración
Cervera Ruiz, Miguel; Oliver, Javier; Prato Grasso, Tomás; García, Julio (Universitat Politècnica de Catalunya, 2001)
Article
Accés obertSe presenta en este trabajo un modelo termo-quimio-mecánico acoplado que permite simular numéricamente los principales fenómenos observados en el comportamiento del hormigón a tempranas edades, es decir, hidratación, ... -
Simulation of construction of RCC dams. I: temperature and aging
Cervera Ruiz, Miguel; Oliver Olivella, Xavier; Prato, Tomás (2000-09)
Article
Accés obertThe increasing number of roller compacted concrete (RCC) dams being built around the world demands accurate methodologies for the realistic short- and long-term evaluations of the risk of thermally induced cracking in these ... -
Simulation of construction of RCC dams. II: stress and damage
Cervera Ruiz, Miguel; Oliver Olivella, Xavier; Prato, Tomás (2000-09)
Article
Accés obertThe increasing number of roller compacted concrete (RCC) dams being built around the world demands accurate methodologies for the realistic short- and long-term evaluations of the risk of thermally induced cracking in these ... -
Simulation-assisted investigation on the formation of layer bands and the microstructural evolution in directed energy deposition of Ti6Al4V blocks
Lu, Xufei; Zhang, Guohao; Li, Junjie; Cervera Ruiz, Miguel; Chiumenti, Michele; Chen, Jing; Lin, Xin; Huang, Weidong (2021-09)
Article
Accés obertAdditive manufacturing (AM) of titanium alloy entails severe microstructural heterogeneity and layer bands due to diverse thermal histories. While the thermal-microstructure relationship in AM has been reported, the details ... -
SLAP: programa para modelado numérico de procesos de estereolitografía utilizando el método de los elementos finitos
Lombera, Guillermo; Bugeda Castelltort, Gabriel; Cervera Ruiz, Miguel; Oñate Ibáñez de Navarra, Eugenio (1994-03)
Report de recerca
Accés obert -
Smart-substrate: a novel structural design to avert residual stress accretion in directed energy deposition additive manufacturing
Lu, Xufei; Zhang, Guohao; Chiumenti, Michele; Cervera Ruiz, Miguel; Slimani, Mehdi; Ma, Liang; Wei, Lei; Lin, Xin (Taylor & Francis Group, 2023-01)
Article
Accés obertResidual stresses, related distortions and cracks are detrimental in metallic Additive Manufacturing (AM). Previously developed stress-control strategies based on reducing thermal gradients hardly diminish the stress ... -
Strain localization analysis of Hill’s orthotropic elastoplasticity: analytical results and numerical verification
Cervera Ruiz, Miguel; Wu, Jian-Ying; Chiumenti, Michele; Kim, Sungchul (Springer, 2020-02)
Article
Accés obertIn this work the strain localization analysis of Hill’s orthotropic plasticity is addressed. In particular, the localization condition derived from the boundedness of stress rates together with Maxwell’s kinematics is ... -
Strain localization and failure mechanics for elastoplastic damage solids
Wu, Jian-Ying; Cervera Ruiz, Miguel (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
Llibre
Accés restringit per política de l'editorialThis work investigates systematically strain localization and failure mechanics for elastoplastic damage solids. Two complementary methodologies, i.e., traction-based discontinuities localized in an elastic solid and strain ... -
Strain localization of elastic-damaging frictional-cohesive materials: analytical results and numerical verification
Wu, Jian-Ying; Cervera Ruiz, Miguel (2017-04-20)
Article
Accés obertDamage-induced strain softening is of vital importance for the modeling of localized failure in frictional-cohesive materials. This paper addresses strain localization of damaging solids and the resulting consistent ... -
Strain localization of orthotropic elasto–plastic cohesive–frictional materials: analytical results and numerical verification
Kim, Sungchul; Cervera Ruiz, Miguel; Wu, Jian-Ying; Chiumenti, Michele (Multidisciplinary Digital Publishing Institute (MDPI), 2021-04)
Article
Accés obertStrain localization analysis for orthotropic-associated plasticity in cohesive–frictional materials is addressed in this work. Specifically, the localization condition is derived from Maxwell’s kinematics, the plastic flow ... -
Stress accurate framework for the numerical simulation of FSW processes
Dialamishabankareh, Narges; Chiumenti, Michele; Cervera Ruiz, Miguel; Agelet de Saracibar Bosch, Carlos (2014)
Text en actes de congrés
Accés restringit per política de l'editorialIn this work, the numerical simulation of the FSW process is tackled by means of an Arbitrary-Lagrangian-Eulerian (ALE) formulation. The computational domain is split into three different zones: the work-piece (defined by ... -
Stress, strain and dissipation accurate 3-field formulation for inelastic isochoric deformation
Chiumenti, Michele; Cervera Ruiz, Miguel; Filho, Carlos Augusto Moreira; Barbat Vlad, Gabriel (2021-09)
Article
Accés obertThis work exploits the high accuracy of the mixed 3-field u/e/p formulation to address materially non-linear inelastic problems including isochoric deformations. Motivated by the strain-driven format of several constitutive ...