Now showing items 1-20 of 52

  • A finite element approach to the simulation of hydraulic fractures with lag 

    Hunsweck, Michael J.; Shen, Yongxing; Lew, Adrian J. (2013)
    Article
    Open Access
    We presented a finite-element-based algorithm to simulate plane-strain, straight hydraulic fractures in an impermeable elastic medium. The algorithm acCOllllts for the nonlinear coupling between the fluid pressure and the ...
  • A hierarchical mathematical model for automatic pipelining and allocation using elastic systems 

    Cortadella, Jordi; Petit Silvestre, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Open Access
    The advent of FPGA-based accelerators has encouraged the use of high-level synthesis (HLS) for rapid prototyping and design space exploration. In this context, design optimization at behavioral level becomes a critical ...
  • A locking-free face-centred finite volume (FCFV) method for linear elastostatics 

    Sevilla, Rubén; Giacomini, Matteo; Huerta, Antonio (2019-02-01)
    Article
    Restricted access - publisher's policy
    A face-centred finite volume (FCFV) method is proposed for linear elastostatic problems. The FCFV is a mixed hybrid formulation, featuring a system of first-order equations, that defines the unknowns on the faces (edges ...
  • A multi-scale theoretical model for soft materials 

    Marti Gallego, Enric (Universitat Politècnica de Catalunya, 2018-09-27)
    Bachelor thesis
    Open Access
    Many manufactured materials, such as rubbers, are made of several constituents with very different mechanical stiffness. Interestingly, the overall mechanical response of the material exhibits a very particular response ...
  • An anisotropic microsphere-based approach for fiber orientation adaptation in soft tissue 

    Sáez Viñas, Pablo; Pena, Estefanía; Doblaré, Manuel; Martínez, Miguel Ángel (2011)
    Article
    Open Access
    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 ...
  • An atomistic-based foliation model for multilayer graphene materials and nanotubes 

    Ghosh, Susanta; Arroyo Balaguer, Marino (2013-01)
    Article
    Open Access
    We present a three-dimensional continuum model for layered crystalline materials made out of weakly interacting two-dimensional crystalline sheets. We specialize the model to multilayer graphene materials, including ...
  • Anisotropic tissue elasticity in human lumbar vertebra, by means of a coupled ultrasound-micromechanics approach 

    Malandrino, Andrea; Fritsch, Andreas; Lahayne, Olaf; Kropik, Karl; Redl, Heinz; Noailly, Jérôme; Lacroix, Damien Jerome; Hellmich, Christian (2012-07-01)
    Article
    Restricted access - publisher's policy
    The extremely fi ne structure of vertebral cortex challenges reliable determination of the tissue's anisotropic elasticity, which is important for the spine's load carrying patterns often causing pain in patients. As a ...
  • An upwind cell centred Total Lagrangian finite volume algorithm for nearly incompressible explicit fast solid dynamic applications 

    Haider, Jibran; Lee, Chun Hean; Gil, Antonio; Huerta, Antonio; Bonet Carbonell, Javier (2018-10-01)
    Article
    Restricted access - publisher's policy
    The paper presents a new computational framework for the numerical simulation of fast large strain solid dynamics, with particular emphasis on the treatment of near incompressibility. A complete set of first order hyperbolic ...
  • A simple microstructural viscoelastic model for flowing foams 

    Ibáñez, Rubén; Scheuer, Adrien; Abisset-Chavanne, Emmanuelle; Chinesta, Francisco; Huerta, Antonio; Keunings, Roland (2019-03)
    Article
    Restricted access - publisher's policy
    The numerical modelling of forming processes involving the flow of foams requires taking into account the different problem scales. Thus, in industrial applications a macroscopic approach is suitable, whereas the macroscopic ...
  • A superconvergent hybridisable discontinuous Galerkin method for linear elasticity 

    Sevilla, Rubén; Giacomini, Matteo; Karkoulias, Alexandros; Huerta, Antonio (John Wiley & sons, 2018-10-12)
    Article
    Open Access
    The first superconvergent hybridisable discontinuous Galerkin method for linear elastic problems capable of using the same degree of approximation for both the primal and mixed variables is presented. The key feature of ...
  • Avoiding early failures in conjugate cam mechanism by means of different design strategies 

    Català Calderon, Pau; Santos López, M. Antonia de los; Veciana Fontanet, Joaquim Maria; Cardona Foix, Salvador (2016-01-01)
    Article
    Restricted access - publisher's policy
    To solve the indetermination of forces existing in a form-closed cam mechanism formed by conjugate cams, where the contact between the cams and the follower rollers is constantly ensured by only the geometry of the elements, ...
  • Bulging brains 

    Weickenmeie, J.; Sáez Viñas, Pablo; Butler, C. A.; Young, P.G.; Gorily, A.; Kuhl, Ellen (2016-10)
    Article
    Open Access
    Brain swelling is a serious condition associated with an accumulation of fluid inside the brain caused by trauma, stroke, infection, or tumors. It increases the pressure inside the skull and reduces blood and oxygen supply. ...
  • Continuous dependence on initial geometry in linear elastodynamics on a half cylinder 

    Knops, R.J.; Quintanilla de Latorre, Ramón (Elsevier, 2009)
    Article
    Restricted access - publisher's policy
    Continuous dependence on the initial time geometry is established for the mean-square integral of the displacement in a linear inhomogeneous anisotropic elastic semi-infinite cylinder in motion subject to a prescribed ...
  • Curved fluid membranes behave laterally as an effective viscoelastic medium 

    Rahimi Lenji, Mohammad; DeSimone, Antonio; Arroyo Balaguer, Marino (2013-08-21)
    Article
    Restricted access - publisher's policy
    The lateral mobility of membrane inclusions is essential in biological processes involving membrane-bound macromolecules, which often take place in highly curved geometries such as membrane tubes or small organelles. Probe ...
  • Damage regularisation with inertia gradients 

    Bennett, Terry; Rodríguez Ferran, Antonio; Askes, Harm (2012-01-01)
    Article
    Open Access
    A gradient enhanced model is formulated which simulates micro-structurally induced wave dispersion and is capable of achieving mesh objective results when modelling strain-softening materials. Length scale parameters are ...
  • Design and additive manufacturing of architected materials with non-linear mechanical response 

    Fabián Alfonso, Ricardo (Universitat Politècnica de Catalunya / University of California, Irvine, 2013)
    Bachelor thesis
    Restricted access - author's decision
    Covenantee:  University of California, Irvine
    Most structural systems are designed to operate in their elastic regime, resulting in a linear relationship between applied loads and resulting displacements. This behavior is easy to analyze but not necessarily optimal ...
  • Development of biomimetic NiTi alloy: influence of thermo-chemical treatment on the physical, mechanical and biological behavior 

    Rupérez de Gracia, Elisa; Manero Planella, José María; Bravo González, Luis-Alberto; Espinar, Eduardo; Gil Mur, Francisco Javier (2016-06)
    Article
    Open Access
    A bioactive layer, free of nickel, has been performed for its greater acceptability and reliability in clinical applications for NiTi shape memory alloys. In the first step, a safe barrier against Ni release has been ...
  • EFFECTS OF IMPERFECTIONS ON THE ELASTIC PROPERTIES OF CARBON NANOTUBES 

    Valero Palacín, Ignacio (Universitat Politècnica de Catalunya, 2009-09-29)
    Master thesis
    Open Access
  • Effects of waviness in composite materials 

    Rodríguez Puig, Alejandro (Universitat Politècnica de Catalunya / Universität Stuttgart, 2009)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    Covenantee:  Universität Stuttgart
    This work is first approach study of the effects of fiber waviness on the elastic properties, specially the Young’s Modulus, of Laminate Composite Materials. This study has been carried out at the Institute for Aircraft ...
  • Eigenvalue and eigenmode synthesis in elastically coupled subsystems 

    Magrans Fontrodona, Francesc Xavier; Poblet-Puig, Jordi (2018-10-13)
    Article
    Restricted access - publisher's policy
    A method to synthesize the modal characteristics of a system from the modal characteristics of its subsystems is proposed. The interest is focused on those systems with elastic links between the parts which is the main ...