Now showing items 1-20 of 72

    • A data-driven learning method for constitutive modeling: application to vascular hyperelastic soft tissues 

      González Ibáñez, David; García González, Alberto; Chinesta Soria, Francisco; Cueto Prendes, Elias (Multidisciplinary Digital Publishing Institute (MDPI), 2020-05-01)
      Article
      Open Access
      We address the problem of machine learning of constitutive laws when large experimental deviations are present. This is particularly important in soft living tissue modeling, for instance, where large patient-dependent ...
    • 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 locking-free face-centred finite volume (FCFV) method for linear elastostatics 

      Sevilla Cárdenas, 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 ...
    • A simple microstructural viscoelastic model for flowing foams 

      Ibáñez, Rubén; Scheuer, Adrien; Abisset-Chavanne, Emmanuelle; Chinesta, Francisco; Huerta, Antonio; Keunings, Roland (2019-03)
      Article
      Open Access
      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 Cárdenas, 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 ...
    • Adaptividad para problemas de elasticidad lineal en 3D 

      Prada, Claudio; Saliba, Roberto; Vénere, Marcelo J. (Centro Internacional de Métodos Numéricos en Ingeniería, 1997)
      Article
      Open Access
      En este trabajo se presenta un método adaptivo para resolver problemas de elasticidad lineal tridimensional por el método de elementos finitos incluyendo varias experiencias, tanto en la implementación como en la utilización ...
    • 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 ...
    • An immersed boundary hierarchical B-spline method for flexoelectricity 

      Codony Gisbert, David; Marco Alacid, Onofre; Fernández Méndez, Sonia; Arias Vicente, Irene (2019-09-01)
      Article
      Restricted access - publisher's policy
      This paper develops a computational framework with unfitted meshes to solve linear piezoelectricity and flexoelectricity electromechanical boundary value problems including strain gradient elasticity at infinitesimal ...
    • 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
      Open Access
      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 ...
    • 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 ...
    • Aplicació del Material Point Method (MPM) a la deformació d'objectes 

      Martin Garcia, Pol (Universitat Politècnica de Catalunya, 2020-01-23)
      Bachelor thesis
      Open Access
      Una de les branques més importants dins de l'animació per computador és la simulació física del comportament dels objectes d'una escena. Generalment es busca obtenir resultats que visualment es comportin com els objectes ...
    • 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, ...
    • Bottoming bending process assisted by electroplasticity 

      Sánchez Egea, Antonio José; González Rojas, Hernan Alberto; Celentano, Diego Javier; Travieso Rodriguez, Jose Antonio; Llumà Fuentes, Jordi (EUETIB, 2013-12)
      Conference report
      Open Access
      Este estudio reporta la influencia de los efectos atérmicos de la electroplasticidad en el proceso de doblado por estampa. Se fabrica un generador que generar pulsos de 300A y un ancho de 50μs. Los materiales estudiados ...
    • 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. ...
    • Computable bounds of functional outputs in linear visco-elastodynamics 

      Verdugo Rojano, Francesc; Díez, Pedro (2012)
      Article
      Open Access
      This work presents a new technique yielding computable bounds of quantities of interest in the framework of linear visco-elastodynamics. A novel expression for the error representation is introduced, alternative to the ...
    • Computable bounds of linear functional outputs in linear visco- elastodynamics 

      Verdugo Rojano, Francesc; Díez, Pedro (2012)
      Conference report
      Open Access
      This work presents a new technique yielding computable bounds of quantities of interest in the framework of linear visco-elastodynamics. A novel expression for the error representation is introduced, alternative to the ...
    • Computation of plastic deformation in spring-back problems 

      Lasanta García, Juan David (Universitat Politècnica de Catalunya, 2019-07-01)
      Bachelor thesis
      Restricted access - author's decision
      Covenantee:   Universidad de Málaga
      The purpose of the project is to determine how structure deforms following elasto-plastic equiations.
    • Computational modelling of flexoelectric materials based on C0-FEM for 4th order PDEs 

      Ventura Siches, Jordi (Universitat Politècnica de Catalunya, 2020-07)
      Master thesis
      Open Access
      El modelatge computacional de l'elasticitat de gradient de deformació i de l'acoblament electromecànic (és a dir, la exoelectricitat i la piezoelectricitat) sempre ha estat un repte atès l'alt ordre de les EDPs amb què es ...