Ara es mostren els items 21-40 de 43

    • On multi-scale computational design of structural materials using the topological derivative 

      Oliver Olivella, Xavier; Ferrer Ferré, Àlex; Cante Terán, Juan Carlos; Giusti, Sebastian Miguel; Lloberas Valls, Oriol (Springer, 2017)
      Capítol de llibre
      Accés restringit per política de l'editorial
      This book brings together some 20 chapters on state-of-the-art research in the broad field of computational plasticity with applications in civil and mechanical engineering, metal forming processes, geomechanics, nonlinear ...
    • On multi-scale structural topology optimization and material design 

      Ferrer Ferré, Àlex; Cante Terán, Juan Carlos; Oliver Olivella, Xavier (Associação Portuguesa de Mecânica Teórica, Aplicada e Computacional (APMTAC), 2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Computational material design has gained considerable interest, along the last years, in the computational mechanics community. Although most of the current approaches focus on one-scale structural optimization, this work ...
    • On numerical simulation of powder compaction process: powder transfer modelling and characterisation 

      Cante Terán, Juan Carlos; Oliver Olivella, Xavier; Gonzalez, C; Calero Martínez, José Antonio; Benitez, F (2005-08)
      Article
      Accés obert
      A numerical model for the powder transfer stage in powder metallurgy cold compaction processes, and the corresponding material characterisation procedure, are proposed. They have been designed on the basis of the following ...
    • On particle finite element methods (PFEM) in dynamic solid mechanics problems 

      Oliver Olivella, Xavier; Cante Terán, Juan Carlos; Weyler Pérez, Rafael; Hartmann, S.; Hernández Ortega, Joaquín Alberto (2009)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The work presents the most relevant features of a numerical simulation setting based on the Particle Finite Element Method. The method is especially suitable for dynamic problems in computational solid mechanics where a ...
    • On the contact domain method: a comparison of penalty and Lagrange multiplier implementations 

      Weyler Pérez, Rafael; Oliver Olivella, Xavier; Sain, Trisha; Cante Terán, Juan Carlos (2012-01)
      Article
      Accés obert
      This work focuses on the assessment of the relative performance of the so-called contact domain method, using either the Lagrange multiplier or the penalty strategies. The mathematical formulation of the contact domain ...
    • On the numerical modeling of granular material flows via the Particle Finite Element Method (PFEM) 

      Dávalos, César; Cante Terán, Juan Carlos; Hernández Ortega, Joaquín Alberto; Oliver Olivella, Xavier (2015-10)
      Article
      Accés obert
      The aim of this work is to describe a numerical framework for reliably and robustly simulating the different kinematic conditions exhibited by granular materials while spreading ---from a stagnant condition, when the ...
    • On the numerical resolution of the discontinuous material bifurcation problem 

      Oliver, Jose; Huespe, Alfredo Edmundo; Cante Terán, Juan Carlos; Díaz, G. (2010)
      Article
      Accés restringit per política de l'editorial
      The work focuses on the numerical resolution of the discontinuous material bifurcation problem as a relevant ingredient in computational material failure mechanics. The problem consists of finding the conditions for the ...
    • On the proper characterization of tooling motions and initial conditions in powder die compaction modeling 

      Hernández Ortega, Joaquín Alberto; Cante Terán, Juan Carlos; Oliver Olivella, Xavier; Weyler Pérez, Rafael (2011-08)
      Article
      Accés obert
      The present paper is concerned with the finite element modeling of Powder Metallurgy (P/M) cold die compaction process. Rather than on material constitutive theories or on numerical algorithmic issues, attention is confined ...
    • Optimal design of Multiresonant Layered Acoustic Metamaterials (MLAM) via a homogenization approach 

      Sal Anglada, Gaston; Yago Llamas, Daniel; Cante Terán, Juan Carlos; Oliver Olivella, Xavier; Roca Cazorla, David (Elsevier, 2023-10)
      Article
      Accés obert
      Broadband sound attenuation at low frequency ranges (below 500 Hz) has been a challenge in the acoustics field which cannot be solved, via conventional materials, unless impractical amounts of mass are employed. Multiresonant ...
    • Particle finite element method applied to granular material flow 

      Cante Terán, Juan Carlos; Oliver Olivella, Xavier; Weyler Pérez, Rafael; Cafiero, Mailhyn E.; Dávalos Chargoy, César Emilio (CIMNE (Centro Internacional de Métodos Numéricos en Ingeniería), 2009-11-25)
      Text en actes de congrés
      Accés obert
      A numerical model, based on a rate-dependent constitutive model, via a flow formulation, and in the framework of the particle finite element method (PFEM) is proposed. It is settled on the assumption that the powder can ...
    • PFEM-based modeling of industrial granular flows 

      Cante Terán, Juan Carlos; Dávalos Chargoy, César Emilio; Hernández Ortega, Joaquín Alberto; Oliver Olivella, Xavier; Jonsén, P.; Gustafsson, G.; Häggblad, H.-Å. (2014-05)
      Article
      Accés obert
      The potential of numerical methods for the solution and optimization of industrial granular flows problems is widely accepted by the industries of this field, the challenge being to promote effectively their industrial ...
    • Simulación numérica de procesos de compactación de pubimateriales 

      Cante Terán, Juan Carlos (Universitat Politècnica de Catalunya, 1995-07-19)
      Tesi
      Accés obert
      En esta tesis se presenta un modelo numérico para simular la fase de compactación de pulvimateriales y su implementación en ordenadores de cálculo paralelo, con el ánimo de facilitar y mejorar el diseño de los procesos de ...
    • Simulación numérica de procesos de compactación de pulvimateriales. Parte 2: Validación y aplicaciones industriales 

      Oliver, Javier; Cante Terán, Juan Carlos; Oller, Sergio (1998)
      Article
      Accés obert
      En la primera parte de este trabajo se describió el modelo numérico propuesto para la simuación del proceso de compactación de pulvimateriales. En esta segunda parte se estudia el comportamiento del modelo mediante la ...
    • The domain interface method in non-conforming domain decomposition multifield problemsdomain decomposition multifield problems 

      Lloberas Valls, Oriol; Cafiero, Mailhyn E.; Cante Terán, Juan Carlos; Ferrer Ferré, Àlex; Oliver Olivella, Xavier (2016-12)
      Article
      Accés obert
      The Domain Interface Method (DIM) is extended in this contribution for the case of mixed fields as encountered in multiphysics problems. The essence of the non-conforming domain decomposition technique consists in a ...
    • The domain interface method: a general-purpose non-intrusive technique for non-conforming domain decomposition problems 

      Cafiero, Mailhyn E.; Lloberas Valls, Oriol; Cante Terán, Juan Carlos; Oliver Olivella, Xavier (2016-04)
      Article
      Accés obert
      A domain decomposition technique is proposed which is capable of properly connecting arbitrary non-conforming interfaces. The strategy essentially consists in considering a fictitious zero-width interface between the ...
    • The particle finite element method (PFEM) in thermo-mechanical problems 

      Rodríguez, J.M.; Carbonell Puigbó, Josep Maria; Cante Terán, Juan Carlos; Oliver Olivella, Xavier (2016-08)
      Article
      Accés obert
      The aim of this work is to develop a numerical framework for accurately and robustly simulating the different conditions exhibited by thermo-mechanical problems. In particular, the work will focus on the analysis of problems ...
    • Topology optimization methods for 3D structural problems: a comparative study 

      Yago Llamas, Daniel; Cante Terán, Juan Carlos; Lloberas Valls, Oriol; Oliver Olivella, Xavier (2022-05-01)
      Article
      Accés obert
      The work provides an exhaustive comparison of some representative families of topology optimization methods for 3D structural optimization, such as the Solid Isotropic Material with Penalization (SIMP), the Level-set, the ...
    • Topology optimization of thermal problems in a nonsmooth variational setting: closed-form optimality criteria 

      Yago Llamas, Daniel; Cante Terán, Juan Carlos; Lloberas Valls, Oriol; Oliver Olivella, Xavier (Springer, 2020-08)
      Article
      Accés obert
      This paper extends the nonsmooth Relaxed Variational Approach (RVA) to topology optimization, proposed by the authors in a preceding work, to the solution of thermal optimization problems. First, the RVA topology optimization ...
    • Topology optimization using the unsmooth variational topology optimization (UNVARTOP) method: an educational implementation in MATLAB 

      Yago Llamas, Daniel; Cante Terán, Juan Carlos; Lloberas Valls, Oriol; Oliver Olivella, Xavier (2021-02)
      Article
      Accés obert
      This paper presents an efficient and comprehensive MATLAB code to solve two-dimensional structural topology optimization problems, including minimum mean compliance, compliant mechanism synthesis, and multi-load compliance ...
    • Towards shock absorbing hyperelastic metamaterial design. (I) Macroscopic scale: computational shock-capturing 

      Núñez Labiella, Alejandro; Cante Terán, Juan Carlos; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier (2022-04)
      Article
      Accés obert
      The work explores the computational modeling of propagating shocks in hyperelastic materials to be considered in the context of numerical analysis and design of mechanical energy absorbing materials. The computational ...