Now showing items 1-12 of 12

    • A combined XFEM phase-field computational model for crack growth without remeshing 

      Muixí Ballonga, Alba; Marco Alacid, Onofre; Rodríguez Ferran, Antonio; Fernández Méndez, Sonia (Springer, 2020-10-07)
      Article
      Open Access
      This paper presents an adaptive strategy for phase-field simulations with transition to fracture. The phase-field equations are solved only in small subdomains around crack tips to determine propagation, while an XFEM ...
    • A hybridizable discontinuous Galerkin phase-field model for brittle fracture 

      Muixí Ballonga, Alba; Fernández Méndez, Sonia; Rodríguez Ferran, Antonio (2019-05-01)
      Article
      Open Access
      Phase-field models for brittle fracture consider smeared representations of cracks, which are described by a continuous field that varies abruptly in the transition zone between unbroken and broken states. Computationally, ...
    • A hybridizable discontinuous Galerkin phase-field model for brittle fracture with adaptive refinement 

      Muixí Ballonga, Alba; Rodríguez Ferran, Antonio; Fernández Méndez, Sonia (John Wiley & sons, 2020-03-30)
      Article
      Open Access
      In this paper, we propose an adaptive refinement strategy for phase-field models of brittle fracture, which is based on a novel hybridizable discontinuous Galerkin (HDG) formulation of the problem. The adaptive procedure ...
    • A multiparametric advection-diffusion reduced-order model for molecular transport in scaffolds for osteoinduction 

      Muixí Ballonga, Alba; Zlotnik, Sergio; Calvet Tordera, Pere; Español Pons, Montserrat; Lodoso Torrecilla, Irene; Ginebra Molins, Maria Pau; Díez, Pedro; García González, Alberto (Springer Nature, 2022-05-05)
      Article
      Open Access
      Scaffolds are microporous biocompatible structures that serve as material support for cells to proliferate, differentiate and form functional tissue. In particular, in the field of bone regeneration, insertion of scaffolds ...
    • Adaptive phase-field modeling of fracture in orthotropic composites 

      Ishank, Jain; Muixí Ballonga, Alba; Annavarapu, Chandrasekhar; Mulay, Shantanu; Rodríguez Ferran, Antonio (2023-11-15)
      Article
      Restricted access - publisher's policy
      An adaptive phase-field method is developed and applied to model fracture propagation in orthotropic composites. The proposed approach extends the work of Muixí et al. (2020) to orthotropic composites through following ...
    • Adaptive phase-field modeling of fracture propagation in bi-layered materials 

      Khan, Salman; Muixí Ballonga, Alba; Annavarapu, Chandrasekhar; Rodríguez Ferran, Antonio (2023-11-15)
      Article
      Restricted access - publisher's policy
      We study fracture propagation in bi-layered materials using an adaptive phase-field method. The method combines a phase-field representation of fracture with spatial adaptivity to provide mesh refinement in the smeared ...
    • Adaptive refinement for phase-field models of brittle fracture based on Nitsche's method 

      Muixí Ballonga, Alba; Fernández Méndez, Sonia; Rodríguez Ferran, Antonio (Springer, 2020-03-18)
      Article
      Open Access
      A new adaptive refinement strategy for phase-field models of brittle fracture is proposed. The approach provides a computationally efficient solution to the high demand in spatial resolution of phase-field models. The ...
    • Constant sigma_2-curvature metrics with non isolated singularities 

      Muixí Ballonga, Alba (Universitat Politècnica de Catalunya, 2016-10)
      Master thesis
      Restricted access - author's decision
      The aim of this thesis is to give a method to produce families of complete Riemannian metrics with positive constant $\sigma_k$-curvature equal to $2^{-k}\binom{n}{k}$ on $M\setminus \Lambda^p$, where $M$ is a Riemannian ...
    • Equacions de difusió no local: laplacià fraccionari i operadors convolutius 

      Muixí Ballonga, Alba (Universitat Politècnica de Catalunya, 2015-07)
      Bachelor thesis
      Open Access
      L objectiu d aquest treball de fi de grau és estudiar dues generalitzacions de l equació de la calor, la primera enlloc d un laplacià té un laplacià fraccionari i la segona un operador de la forma $Lu = J ∗ u − ...
    • Locally adaptive phase-field models and transition to fracture 

      Muixí Ballonga, Alba (Universitat Politècnica de Catalunya, 2020-11-30)
      Doctoral thesis
      Open Access
      This thesis proposes a new computational model for the efficient simulation of crack propagation, through the combination of a phase-field model in small subdomains around crack tips and a discontinuous model in the rest ...
    • Nonlinear dimensionality reduction for parametric problems: a kernel proper orthogonal decomposition 

      Díez, Pedro; Muixí Ballonga, Alba; Zlotnik, Sergio; García González, Alberto (John Wiley & sons, 2021-12-30)
      Article
      Open Access
      Reduced-order models are essential tools to deal with parametric problems in the context of optimization, uncertainty quantification, or control and inverse problems. The set of parametric solutions lies in a low-dimensional ...
    • Physics-based manifold learning in scaffolds for tissue engineering: application to inverse problems 

      Muixí Ballonga, Alba; Zlotnik, Sergio; García González, Alberto; Díez, Pedro (2022-10-03)
      Article
      Open Access
      In the field of bone regeneration, insertion of scaffolds favours bone formation by triggering the differentiation of mesenchymal cells into osteoblasts. The presence of Calcium ions (Ca2+) in the interstitial fluid across ...