Now showing items 21-40 of 103

    • Computational material design for acoustic cloaking 

      Méndez, Carlos Alberto; Podestá, J.M.; Lloberas Valls, Oriol; Toro, Sebastian; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier (John Wiley & Sons, 2017-12)
      Article
      Open Access
      A topology optimization technique based on the topological derivative and the level set function is utilized to design/synthesize the micro-structure of a pentamode material for an acoustic cloaking device. The technique ...
    • Computational modeling of high-performance steel fiber reinforced concrete using a micromorphic approach 

      Huespe, Alfredo Edmundo; Oliver Olivella, Xavier; Mora, Diego Fernando (2013-12)
      Article
      Open Access
      A finite element methodology for simulating the failure of high performance fiber reinforced concrete composites (HPFRC), with arbitrarily oriented short fibers, is presented. The composite material model is based on a ...
    • Continuous chip formation in metal cutting processes using the Particle Finite Element Method (PFEM) 

      Rodríguez, J. M.; Carbonell Puigbó, Josep Maria; Cante Terán, Juan Carlos; Oliver Olivella, Xavier (2017-08-01)
      Article
      Open Access
      This paper presents a study on the metal cutting simulation with a particular numerical technique, the Particle Finite Element Method (PFEM) with a new modified time integration algorithm and incorporating a contact algorithm ...
    • Continuum approach to computational multi-scale modeling of fracture 

      Oliver Olivella, Xavier; Caicedo Silva, Manuel Alejandro; Roubin, Emmanuel; Huespe, Alfredo Edmundo (2014-09-01)
      Article
      Open Access
      This paper presents a FE2 multi-scale framework for numerical modeling of the structural failure of heterogeneous quasi-brittle materials. The model is assessed by application to cementitious materials. Using the Continuum ...
    • Continuum approach to computational multiscale modeling of propagating fracture 

      Oliver Olivella, Xavier; Caicedo Silva, Manuel Alejandro; Roubin, Emmanuel; Huespe, Alfredo Edmundo; Hernández Ortega, Joaquín Alberto (2015-09)
      Article
      Open Access
      A new approach to two-scale modeling of propagating fracture, based on computational homogenization (FE2), is presented. The specific features of the approach are: a) a continuum setting for representation of the fracture ...
    • Continuum approach to material failure in strong discontinuity settings 

      Oliver Olivella, Xavier; Huespe, Alfredo Edmundo (2004-07)
      Article
      Open Access
      The paper focuses the numerical modelling of material failure in a strong discontinuity setting using a continuum format. Displacement discontinuities, like fractures, cracks, slip lines, etc., are modelled in a strong ...
    • Continuum approach to the numerical simulation of material failure in concrete 

      Oliver Olivella, Xavier; Huespe, Alfredo Edmundo; Samaniego, E; Chaves, E W V (2004-06)
      Article
      Open Access
      Some new aspects of the continuum strong discontinuity approach (CSDA) to model material failure in geomaterials are addressed. A new global algorithm, for tracking multiple crack lines/surfaces in 2D/3D cases is proposed. ...
    • Continuum Mechanics for Engineers. Theory and Problems 

      Oliver Olivella, Xavier; Agelet de Saracibar Bosch, Carlos (2017-03)
      Book
      Open Access
      This book was born with the vocation of being a tool for the training of engineers in continuum mechanics. In fact, it is the fruit of the experience in teaching this discipline during many years at the Civil Engineering ...
    • 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 ...
    • Crack-path field and strain-injection techniques in computational modeling of propagating material failure 

      Oliver Olivella, Xavier; Dias, I.F.; Huespe, Alfredo Edmundo (2014-01)
      Article
      Open Access
      The work presents two new numerical techniques devised for modeling propagating material failure, i.e. cracks in fracture mechanics or slip-lines in soil mechanics. The first one is termed crack-path-field technique and ...
    • 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
      Open Access
      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 ...
    • From continuum mechanics to fracture mechanics: the strong discontinuity approach 

      Oliver Olivella, Xavier; Huespe, Alfredo Edmundo; Gómez Pulido, M. Dolores; Chaves, E (2002-01)
      Article
      Open Access
      The paper deals with the strong discontinuity approach and shows the links with the decohesive fracture mechanics provided by that approach. On the basis of 1D continuum damage models it is shown that, by introducing some ...
    • 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 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 ...
    • High performance reduction technique for multiscale finite element modeling (HPR-FE2): towards industrial multiscale FE software 

      Raschi Schaw, Marcelo; Lloberas Valls, Oriol; Huespe, Alfredo Edmundo; Oliver Olivella, Xavier (2021-03)
      Article
      Restricted access - publisher's policy
      The authors have shown in previous contributions that reduced order modeling with optimal cubature applied to finite element square (FE) techniques results in a reliable and affordable multiscale approach, the HPR-FE2 ...
    • 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 ...