Now showing items 1-7 of 7

    • 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
      Restricted access - publisher's policy
      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
      Restricted access - publisher's policy
      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 ...
    • 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
      Restricted access - publisher's policy
      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 ...