Ara es mostren els items 1-20 de 22

    • A consistent relaxation of optimal design problems for coupling shape and topological derivatives 

      Amstutz, Samuel; Dapogny, Charles; Ferrer Ferré, Àlex (2018-09)
      Article
      Accés obert
      In this article, we introduce and analyze a general procedure for approximating a ‘black and white’ shape and topology optimization problem with a density optimization problem, allowing for the presence of ‘grayscale’ ...
    • A general methodology for deriving shear contrained Reissner Mindlin plate elements 

      Oñate Ibáñez de Navarra, Eugenio; Zienkiewicz, Olgierd Cecil; Suárez Arroyo, Benjamín; Taylor, R.L. (1990-06)
      Report de recerca
      Accés obert
    • An anisotropic microsphere-based approach for fiber orientation adaptation in soft tissue 

      Sáez Viñas, Pablo; Pena, Estefanía; Doblaré, Manuel; Martínez, Miguel Ángel (2011)
      Article
      Accés obert
      Evolutionary processes in biological tissue, such as adaptation or remodeling, represent an enterprising area of research. In this paper, we present a multiscale model for the remodeling of fibered structures, such as ...
    • Combining size-preserving and smoothing procedures for adaptive quadrilateral mesh generation 

      Ruiz Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (Springer, 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      It is well known that the variations of the element size have to be controlled in order to generate a high-quality mesh. Hence, several techniques have been developed to limit the gradient of the element size. However, the ...
    • Defining quality measures for validation and generation of high-order meshes 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Peraire Guitart, Jaume; Sarrate Ramos, Josep (Springer, 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A procedure to quantify the distortion (quality) of a high-order mesh composed by curved tetrahedral elements is presented. The proposed technique has two main applications. First, it can be used to check the validity and ...
    • Explicit parametric solutions of lattice structures with proper generalized decomposition (PGD): applications to the design of 3D-printed architectured materials 

      Sibileau, Alberto; García González, Alberto; Auricchio, Ferdinando; Morganti, Simone; Díez, Pedro (2018-01-10)
      Article
      Accés obert
      Architectured materials (or metamaterials) are constituted by a unit-cell with a complex structural design repeated periodically forming a bulk material with emergent mechanical properties. One may obtain specific macro-scale ...
    • Inserting curved boundary layers for viscous flow simulation with high-order tetrahedra 

      Gargallo Peiró, Abel; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep; Peraire Guitart, Jaume (Springer, 2013)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      We propose an a posteriori approach for generating curved meshes for viscous flow simulations composed by high-order tetrahedra. The proposed approach is performed in the following three steps: (1) generate a linear ...
    • La generació d’una xarxa d’autobusos i l’assignació d’aquests a les línies: dos algorismes heurístics 

      Roselló i Molinari, Xavier (Universitat Politècnica de Barcelona. Centre de Càlcul, 1977-12)
      Article
      Accés obert
      L'article presenta un model de transport i dos algorismes que operen en el context d'aquest. El primer algorisme genera una xarxa d'autobusos, entenent una xarxa com un conjunt de línies, o bé en millora una de ja existent, ...
    • Machine learning techniques for optimal worm-like motion 

      Jiménez Blanco, Albert (Universitat Politècnica de Catalunya, 2023-05)
      Treball Final de Grau
      Accés obert
      En un context de popularització de les tècniques d’Intel·ligència Artificial, aquest treball es proposa aplicar la versió més coneguda d’aquestes, les xarxes neuronals, per tractar comprendre la dinàmica del tipus de cuc ...
    • Nonintrusive reduced order model for parametric solutions of inertia relief problems 

      Cavaliere, Fabiola; Zlotnik, Sergio; Sevilla Cárdenas, Rubén; Larráyoz Izcara, Xabier; Díez, Pedro (John Wiley & sons, 2021-08-30)
      Article
      Accés obert
      The Inertia Relief (IR) technique is widely used by industry and produces equilibrated loads allowing to analyze unconstrained systems without resorting to the more expensive full dynamic analysis. The main goal of this ...
    • On curving high-order hexahedral meshes 

      Gargallo Peiró, Abel; Ruiz Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (Elsevier, 2015)
      Comunicació de congrés
      Accés obert
      We present a new definition of distortion and quality measures for high-order hexahedral (quadrilateral) elements. This definition leads to two direct applications. First, it can be used to check the validity and quality ...
    • On the use of the Bingham statistical distribution in microsphere-based constitutive models for arterial tissue 

      Alastrué, V.; Sáez Viñas, Pablo; Martínez, M.A,; Doblaré, Manuel (2010)
      Article
      Accés obert
      Constitutive models for arterial tissue have been an active research field during the last years. The main micro-constituents of blood vessels are different types of cells and the extra-cellular matrix formed by an isotropic ...
    • Optimizing rock cutting through computer simulation 

      Rojek, Jerzy; Oñate Ibáñez de Navarra, Eugenio; Labra, C.; Kazal, H.; Akerman, J. (2009)
      Report de recerca
      Accés obert
      This paper presents an original thermomechanical model of rock cutting with evaluation of tool wear. The model has been developed within the framework of the discrete element method, which is a suitable numerical method ...
    • Piezoelectric mimicry of flexoelectricity 

      Abdollahi Hosnijeh, Amir; Vazquez Sancho, Fabian; Catalan, Gustau (American Institute of Physics (AIP), 2018-11-15)
      Article
      Accés obert
      The origin of “giant” flexoelectricity, orders of magnitude larger than theoretically predicted, yet frequently observed, is under intense scrutiny. There is mounting evidence correlating giant flexoelectriclike effects ...
    • Potential externalities savings due to electric vehicle smart charge 

      Benveniste Pérez, Gabriela; Corchero García, Cristina; Cruz Zambrano, Miguel (2015)
      Text en actes de congrés
      Accés obert
      This work focuses on the analysis developed in order to demonstrate how smart charging, using tailored control algorithms, contributes to minimize the environmental impact and economic costs associated to the electric ...
    • Revisiting interval protection, a.k.a. partial cell suppression, for tabular data 

      Castro Pérez, Jordi; Via Baraldés, Anna (Springer, 2016)
      Text en actes de congrés
      Accés obert
      Interval protection or partial cell suppression was introduced in “M. Fischetti, J.-J. Salazar, Partial cell suppression: A new methodology for statistical disclosure control, Statistics and Computing, 13, 13–21, 2003” as ...
    • SIMP-ALL: a generalized SIMP method based on the topological derivative concept 

      Ferrer Ferré, Àlex (John Wiley & sons, 2019-10-19)
      Article
      Accés obert
      Topology optimization has emerged in the last years as a promising research fieldwith a wide range of applications. One of the most successful approaches, theSIMP method, is based on regularizing the problem and proposing ...
    • Simulating squeeze flows in multiaxial laminates: towards fully 3D mixed formulations 

      Ibáñez, Rubén; Abisset-Chavanne, Emmanuelle; Chinesta, Francisco; Huerta, Antonio (2017-10)
      Article
      Accés restringit per política de l'editorial
      Thermoplastic composites are widely considered in structural parts. In this paper attention is paid to squeeze flow of continuous fiber laminates. In the case of unidirectional prepregs, the ply constitutive equation is ...
    • Sistema de gestión energético óptimo para edificios inteligentes con sistemas de generación renovable integrados 

      Igualada González, Lucía; Corchero García, Cristina; Cruz Zambrano, Miguel (2013)
      Text en actes de congrés
      Accés obert
      Como solución para los nuevos edificios que desean adquirir la etiqueta de “edificios inteligentes” proponemos un software de gestión energética optima. Se trata de un sistema centralizado capaz de gestionar elementos de ...
    • Size preserving mesh generation in adaptivity processes 

      Ruiz Gironés, Eloi; Roca Navarro, Francisco Javier; Sarrate Ramos, Josep (Sociedad Española de Métodos Numéricos en Ingeniería (SEMNI), 2013)
      Text en actes de congrés
      Accés obert
      It is well known that the variations of the element size have to be controlled in order to generate a high-quality mesh. Hence, several techniques have been developed to limit the gradient of the element size. Although ...