Now showing items 21-40 of 71

  • Crack path field and strain injection techniques in dynamic fracture simulations 

    Lloberas Valls, Oriol; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier; Dias, I.F. (2016)
    Conference report
    Open Access
    Dynamic fracture phenomena are studied employing low cost computational tools based on Finite Elements with Embedded strong discontinuities (E-FEM). Fracture nucleation and propagation are accounted for through the injection ...
  • Educating XXIst century civil engineers in Barcelona 

    Turmo Coderque, José; Estela Carbonell, M. Rosa; Chacón Flores, Rolando Antonio; Gironella Cobos, Xavier; Lloberas Valls, Oriol; Oliver Olivella, Xavier; Poblet-Puig, Jordi; Puigví Burniol, Maria Àngels; Valls del Barrio, Susanna; Díez, Pedro (2017)
    Conference report
    Restricted access - publisher's policy
    The educational programs of Civil Engineering schools have evolved to adapt to changes in society demands and regulations. Specifically, Civil Engineering curricula in Spain was highly impacted by the Bolonia Declaration ...
  • Experimental and numerical assessment of local resonance phenomena in 3D-printed acoustic metamaterials 

    Roca Cazorla, David; Pàmies Gómez, Teresa; Cante Terán, Juan Carlos; Lloberas Valls, Oriol; Oliver Olivella, Xavier (2020-04)
    Article
    Restricted access - publisher's policy
    The so called Locally Resonant Acoustic Metamaterials (LRAM) are a new kind of artificially engineered materials capable of attenuating acoustic waves. As the name suggests, this phenomenon occurs in the vicinity of internal ...
  • Experimental and numerical study of the die filling stage in powder metallurgy 

    Cante Terán, Juan Carlos; Oliver Olivella, Xavier; González Ferrari, Carlos; Riera Colom, María Dolores; Istúriz, Álvaro; Prado Pozuelo, José Manuel (European Powder Metallurgy, 2005)
    Conference report
    Open Access
    The aim of this work is to show the potential of the Particle Finite Element Method (PFEM) in the simulation of the powder transfer stage, in powder metallurgy industrial processes. The most innovative aspects of the work ...
  • Finite element modelling of ejection cracks in powder metallurgy die compaction processes: case study 

    Hernández Ortega, Joaquín Alberto; Oliver Olivella, Xavier; Cante Terán, Juan Carlos; Weyler Pérez, Rafael (2012)
    Article
    Open Access
    To date, the modelling of crack formation during the ejection stage in powder metallurgy die compaction processes has fallen outside the scope of conventional finite element studies on this process. In this paper, we attempt ...
  • 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 (2019-09)
    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 ...
  • Implicit–explicit integration of gradient-enhanced damage models 

    Titscher, Thomas; Oliver Olivella, Xavier; Unger, Jörg F. (American Society of Civil Engineers, 2019-07)
    Article
    Open Access
    Quasi-brittle materials exhibit strain softening. Their modeling requires regularized constitutive formulations to avoid instabilities on the material level. A commonly used model is the implicit gradient-enhanced damage ...
  • Making use of symmetries in the three-dimensional elastic inverse homogenization problem 

    MÉNDEZ, CARLOS ALBERTO; Podestá, J. M.; Toro, S.; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier (2019)
    Article
    Open Access
    The objective of this paper is the design of three-dimensional elastic metamaterials with periodic microarchitectures. The microarchitectures of these materials are attained by following an inverse design technique jointly ...
  • 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 ...
  • Multimedia Course : Continuum Mechanics for Engineers 

    Oliver Olivella, Xavier (Universitat Politècnica de Catalunya, 2017-05)
    Open Access
  • 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 ...