Ara es mostren els items 129-137 de 137

    • The intrinsic time for the streamline upwind/Petrov-Galerkin formulation using quadratic elements 

      Codina, Ramon; Oñate Ibáñez de Navarra, Eugenio; Cervera Ruiz, Miguel (1992-01)
      Article
      Accés obert
      In this paper the functions of the Péclet number that appear in the intrinsic time of the streamline upwind/Petrov-Galerkin (SUPG) formulation are analyzed for quadratic elements. Some related issues such as the computation ...
    • Thermo-chemo-mechanical model for concrete. I: hydration and aging 

      Cervera Ruiz, Miguel; Oliver Olivella, Xavier; Prato, Tomás (American Society of Civil Engineers, 1999-09)
      Article
      Accés obert
      In this work a coupled thermo-chemo-mechanical model for the behavior of concrete at early ages is proposed. The model allows simulation of the observed phenomena of hydration, aging, damage, and creep. It is formulated ...
    • Thermo-chemo-mechanical model for concrete. II: damage and creep 

      Cervera Ruiz, Miguel; Oliver Olivella, Xavier; Prato, T (American Society of Civil Engineers, 1999-09)
      Article
      Accés obert
      In this work a coupled thermo-chemo-mechanical model for the behavior of concrete at early ages is proposed. This paper presents the formulation and assessment of the mechanical aspects of the model. Short- and long-term ...
    • Thermo-mechanical simulation of annealing heat treatment of Ni-based GH4099 superalloy made by laser powder bed fusion 

      Lu, Xufei; Chen, Chaoyue; Zhang, Guohao; Chiumenti, Michele; Cervera Ruiz, Miguel; Yin, Haoliang; Ma, Liang; Lin, Xin (Elsevier, 2023-07)
      Article
      Accés restringit per política de l'editorial
      Laser powder bed fusion (LPBF) additive manufacturing (AM) unavoidably generates residual stresses due to sharp thermal gradients and the strong mechanical constraints of the substrate. These stresses can lead to large ...
    • Tracking multi-directional intersecting cracks in numerical modelling of masonry shear walls under cyclic loading 

      Saloustros, Savvas; Cervera Ruiz, Miguel; Pelà, Luca (2018-05)
      Article
      Accés obert
      In-plane cyclic loading of masonry walls induces a complex failure pattern composed of multiple diagonal shear cracks, as well as flexural cracks. The realistic modelling of such induced localized cracking necessitates the ...
    • Tracking of localized cracks in the finite element analysis of masonry walls 

      Saloustros, Savvas; Pelà, Luca; Cervera Ruiz, Miguel; Roca Fabregat, Pedro (Springer, Cham, 2019)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Macro-models are a common choice for the numerical analysis of large-scale masonry structures. Despite their efficiency in terms of pre-processing and computational cost, these strategies often result in a poor representation ...
    • Una formulación mixta estabilizada explícita para plasticidad conlocalización de deformaciones 

      Lafontaine, N. M.; Cervera Ruiz, Miguel; Rossi, Riccardo; Chiumenti, Michele (Universitat Politècnica de Catalunya. CIMNE, 2017-07)
      Article
      Accés obert
      Este artículo presenta la aplicación de la formulación mixta estabilizada explícita en desplazamientos y deformaciones (MEX-FEM) [23,24] para la solución de problemas no lineales de la mecánica de sólidos con localización ...
    • Viscoelasticity and damage model for creep behaviour of historical masonry structures 

      Roca Fabregat, Pedro; Cervera Ruiz, Miguel; Pelà, Luca; Clemente Ortega, Roberto; Chiumenti, Michele (2012-11-23)
      Article
      Accés obert
      This paper presents a continuum model for the simulation of the viscous effects and the long-term damage accumulation in masonry structures. The rheological model is based on a generalized Maxwell chain representation ...
    • Warpage analysis and control of thin-walled structures manufactured by laser powder bed fusion 

      Lu, Xufei; Chiumenti, Michele; Cervera Ruiz, Miguel; Hua, Tan; Xin, Lin; Song, Wang (Multidisciplinary Digital Publishing Institute (MDPI), 2021-05)
      Article
      Accés obert
      Thin-walled structures are of great interest because of their use as lightweight components in aeronautical and aerospace engineering. The fabrication of these components by additive manufacturing (AM) often produces ...