Exploració per autor "Cervera Ruiz, Miguel"
Ara es mostren els items 96-115 de 137
-
Objectivity in quasi-brittle structural failure via adaptive formulation and mesh refinement
Barbat Vlad, Gabriel; Cervera Ruiz, Miguel; Venghaus, Henning; Chiumenti, Michele (2022-12)
Article
Accés restringit per política de l'editorialIn this work, the combined implementation of Adaptive Formulation Refinement (AFR) and Adaptive Mesh Refinement (AMR) strategies is proposed for the efficient and mesh objective evaluation of quasi-brittle fracture. A ... -
On the computational modeling of FSW processes
Agelet de Saracibar Bosch, Carlos; Chiumenti, Michele; Santiago, Diego; Cervera Ruiz, Miguel; Dialami, Narges; Lombera, Guillermo (NEAT Press, 2010)
Text en actes de congrés
Accés restringit per política de l'editorialThis work deals with the computational modeling and numerical simulation of Friction Stir Welding (FSW) processes. Here a quasi-static, transient, mixed stabilized Eulerian formulation is used. Norton-Hoff and Sheppard-Wright ... -
On the equivalence between traction- and stress-based approaches for the modeling of localized failure in solids
Wu, Jian-Ying; Cervera Ruiz, Miguel (2015-09)
Article
Accés obertThis work investigates systematically traction- and stress-based approaches for the modeling of strong and regularized discontinuities induced by localized failure in solids. Two complementary methodologies, i.e., ... -
On the mechanics of strain localization in plasticity: isotropic and orthotropic, elasto- and rigid-plastic, associated and non-associated models
Cervera Ruiz, Miguel; Wu, Jian-Ying; Kim, Sungchul; Chiumenti, Michele (2022-04)
Article
Accés obertAs strain localization is usually prognostics of localized failure in solids and structures, prediction of its occurrence and quantification of its adverse effects are of both theoretical and practical significance. Regarding ... -
Optimal kinematics for finite elements with smeared-embedded discontinuity
Wu, J.Y.; Cervera Ruiz, Miguel (2009)
Text en actes de congrés
Accés obertIn this paper an optimal kinematics for finite elements with smeared non-uniform discontinuity/crack is proposed to eliminate the spurious stress transfer across a fully softened crack (i.e. stress locking). We first ... -
Out-of-plane seismic response and failure mechanism of masonry structures using finite elements with enhanced strain accuracy
Vlachakis, Georgios; Cervera Ruiz, Miguel; Barbat Vlad, Gabriel; Saloustros, Savvas (Elsevier, 2019-03)
Article
Accés obertThe out-of-plane response is a complex and at the same time key aspect of the seismic vulnerability of masonry structures. It depends on several factors, some of which are the material properties, the quality of the walls, ... -
Peridynamic buildability analysis of 3D-printed concrete including damage, plastic flow and collapse
Zhu, Jinggao; Ren, Xiaodan; Cervera Ruiz, Miguel (Elsevier, 2023-07)
Article
Accés restringit per política de l'editorialWithout the restriction of formwork, 3D–printed concrete (3DPC) shows great advantages in construction; for the same reason, it presents stability problems, which greatly affect its buildability. In the present paper, a ... -
Prediction of joint line remnant defect in friction stir welding
Dialamishabankareh, Narges; Cervera Ruiz, Miguel; Chiumenti, Michele; Segatori, Antonio (2019-02)
Article
Accés obertThis work studies computationally and experimentally the joint line remnant defects emerging in friction stir welding (FSW) due to oxide layer propagation into the weld. A finite element-based model is used for the ... -
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 ...