Now showing items 21-40 of 55

  • Flow regime analyses during the filling stage in powder metallurgy processes: experimental study and numerical modelling 

    Cante Terán, Juan Carlos; Riera Colom, María Dolores; Oliver Olivella, Xavier; Prado Pozuelo, José Manuel (2011-01)
    Article
    Open Access
    Experimental and numerical studies of powder flow during the die filling stage in powder metallurgy cold compaction processes are presented. An experimental setting consisting of a horizontal pneumatically activated ...
  • Generation of segmental chips in metal cutting modelled with the PFEM 

    Rodriguez Prieto, Juan Manuel; Carbonell Puigbó, Josep Maria; Cante Terán, Juan Carlos; Oliver Olivella, Xavier; Jonsen, Par (2017-09-01)
    Article
    Open Access
    The Particle Finite Element Method, a lagrangian finite element method based on a continuous Delaunay re-triangulation of the domain, is used to study machining of Ti6Al4V. In this work the method is revised and applied ...
  • High-performance model reduction procedures in multiscale simulations 

    Hernández Ortega, Joaquín Alberto; Oliver Olivella, Xavier; Huespe, Alfredo Edmundo; Caicedo, Manuel Alejandro (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2012-03-01)
    Book
    Open Access
    Technological progress and discovery and mastery of increasingly sophisticated structural materials have been inexorably tied together since the dawn of history. In the present era — the so-called Space Age —-, the prevailing ...
  • High-performance model reduction techniques in computational multiscale homogenization 

    Hernández Ortega, Joaquín Alberto; Oliver Olivella, Xavier; Huespe, Alfredo Edmundo; Caicedo Silva, Manuel Alejandro; Cante Terán, Juan Carlos (2014-07-01)
    Article
    Open Access
    A novel model-order reduction technique for the solution of the fine-scale equilibrium problem appearing in computational homogenization is presented. The reduced set of empirical shape functions is obtained using a ...
  • High performance reduced order modeling techniques based on optimal energy quadrature: application to geometrically non-linear multiscale inelastic material modeling 

    Caicedo Silva, Manuel Alejandro; Mroginski, Javier L.; Toro, Sebastian; Raschi Schaw, Marcelo; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier (2018-02)
    Article
    Open Access
    A High-Performance Reduced-Order Model (HPROM) technique, previously presented by the authors in the context of hierarchical multiscale models for non linear-materials undergoing infinitesimal strains, is generalized to ...
  • Material design of elastic structures using Voronoi cells 

    Podestá, J.M.; Méndez, C. G.; Toro, S.; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier (John Wiley & sons, 2018-07)
    Article
    Open Access
    New tools for the design of metamaterials with periodic microarchitectures are presented. Initially, a two-scale material design approach is adopted. At the structure scale, the material effective properties and their ...
  • Mecánica de medios continuos para ingenieros 

    Oliver Olivella, Xavier; Agelet de Saracibar Bosch, Carlos (Edicions UPC, 2002)
    Book
    Open Access
    Mecánica de medios continuos para ingenieros pretende ser una herramienta para la formación de los ingenieros en la mecánica de medios continuos, que mantiene un equilibrio adecuado entre la rigurosidad de su planteamiento ...
  • Mecànica de medis continus per a enginyers 

    Oliver Olivella, Xavier; Agelet de Saracibar Bosch, Carlos (Iniciativa Digital Politècnica, 2003)
    Book
    Open Access
    Mecànica de medis continus per a enginyers vol ser una eina per a la formació dels enginyers en la mecànica dels medis continus, que manté un equilibri adequat entre el rigor del seu plantejament i la claredat dels principis ...
  • Modeling tensile crack propagation in concrete gravity dams via crack-path-field and strain injection techniques 

    Dias, I.F.; Oliver Olivella, Xavier; Lemos, J.V.; Lloberas Valls, Oriol (2016-03)
    Article
    Open Access
    This work investigates tensile crack propagation in concrete gravity dams by using some recently developed numerical techniques (crack-path field and strain injection techniques). The work carefully addresses aspects related ...
  • Un modelo constitutivo de daño plástico para materiales friccionales. Parte II: Generalización para procesos con degradación de rigidez: ejemplos 

    Oliver Olivella, Xavier; Oller Martínez, Sergio Horacio; Lubliner, J.; Oñate Ibáñez de Navarra, Eugenio (Centro Internacional de Métodos Numéricos en Ingeniería, 1988-10)
    Article
    Open Access
  • Model Order Reduction in computational multiscale fracture mechanics 

    Caicedo Silva, Manuel Alejandro; Oliver Olivella, Xavier; Huespe, Alfredo Edmundo; Lloberas Valls, Oriol (2016-09)
    Article
    Open Access
    Nowadays, the model order reduction techniques have become an intensive research eld because of the increasing interest in the computational modeling of complex phenomena in multi-physic problems, and its conse- quent ...
  • Multi-scale (FE2) analysis of material failure in cement/aggregate-type composite structures 

    Oliver Olivella, Xavier; Caicedo, Manuel Alejandro; Roubin, Emmanuel; Hernández Ortega, Joaquín Alberto; Huespe, Alfredo Edmundo (CRC, 2014)
    Conference report
    Open Access
    The work propases a FP multiscale approach to computational modeling of material failure in concreteMlike structures, made of cement/aggregate-type composite materials. Keeping the approach in a classical homogenization ...
  • Numerical modeling of crack formation in power compaction processes 

    Hernández Ortega, Joaquín Alberto; Oliver Olivella, Xavier; Cante Terán, Juan Carlos (Universitat Politècnica de Catalunya. Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2009)
    Book
    Open Access
    Powder metallurgy (P/M) is an important technique of manufacturing metal parts from metal in powdered form. Traditionally, P/M processes and products have been designed and developed on the basis of practical rules and ...
  • 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)
    Part of book or chapter of book
    Restricted access - publisher's policy
    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)
    Conference report
    Restricted access - publisher's policy
    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 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)
    Conference report
    Restricted access - publisher's policy
    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 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
    Open Access
    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 ...
  • 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)
    Conference report
    Open Access
    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
    Open Access
    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 ...
  • Reduced Finite Element square techniques (RFE2): towards industrial multiscale FE software 

    Lloberas Valls, Oriol; Raschi Schaw, Marcelo; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier (International Centre for Numerical Methods in Engineering (CIMNE), 2019)
    Conference report
    Open Access
    The FE2 method has gained a considerable interest within the simulation science community because of its generality and potential. Indeed, multiscale problems with complex micro-structures and constitutive behaviors can ...