Now showing items 1-20 of 82

    • A finite deformation membrane based on inter-atomic potentials for the transverse mechanics of nanotubes 

      Arroyo Balaguer, Marino; Belytschko, T. (2003-03)
      Article
      Open Access
      A finite deformation hyper-elastic membrane theory based on inter-atomic potentials for crystalline films composed of a single atomic layer is developed. For this purpose, an extension of the standard Born rule that exploits ...
    • A stabilized formulation with maximum entropy meshfree approximants for viscoplastic flow simulation in metal forming 

      Greco, F.; Filice, L.; Peco, Christian; Arroyo Balaguer, Marino (2015-07-01)
      Article
      Open Access
      The finite element method is the reference technique in the simulation of metal forming and provides excellent results with both Eulerian and Lagrangian implementations. The latter approach is more natural and direct but ...
    • A variational model of fracture for tearing brittle thin sheets 

      Li, Bin; Millán Zurita, Daniel; Torres Sánchez, Alejandro; Arroyo Balaguer, Marino (2018-10)
      Article
      Restricted access - publisher's policy
      Tearing of brittle thin elastic sheets, possibly adhered to a substrate, involves a rich interplay between nonlinear elasticity, geometry, adhesion, and fracture mechanics. In addition to its intrinsic and practical interest, ...
    • Active superelasticity in three-dimensional epithelia of controlled shape 

      Latorre Ibars, Ernest; Kale, Sohan Sudhir; Casares, Laura; Arroyo Balaguer, Marino (Macmillan Publishers, 2018-11)
      Article
      Open Access
      Fundamental biological processes are carried out by curved epithelial sheets that enclose a pressurized lumen. How these sheets develop and withstand three-dimensional deformations has remained unclear. Here we combine ...
    • Adaptivity based on error estimation for viscoplastic softening materials 

      Díez, Pedro; Arroyo Balaguer, Marino; Huerta, Antonio (2000-02)
      Article
      Open Access
      This paper focuses on the numerical simulation of strain softening mechanical problems. Two problems arise: (1) the constitutive model has to be regular and (2) the numerical technique must be able to capture the two scales ...
    • Adhesion and friction control localized folding in supported graphene 

      Zhang, Kuan; Arroyo Balaguer, Marino (American Institute of Physics (AIP), 2013-05)
      Article
      Restricted access - publisher's policy
      Graphene deposited on planar surfaces often exhibits sharp and localized folds delimiting seemingly planar regions, as a result of compressive stresses transmitted by the substrate. Such folds alter the electronic and ...
    • An adaptive meshfree method for phase-field models of biomembranes. Part I: Approximation with maximum-entropy basis functions 

      Peco Regales, Christian; Arroyo Balaguer, Marino; Rosolen, Adrian Martin (2013-09)
      Article
      Restricted access - publisher's policy
      We present an adaptive meshfree method to approximate phase-field models of biomembranes. In such models, the Helfrich curvature elastic energy, the surface area, and the enclosed volume of a vesicle are written as functionals ...
    • An adaptive meshfree method for phase-field models of biomembranes. Part II: A Lagrangian approach for membranes in viscous fluids 

      Peco Regales, Christian; Arroyo Balaguer, Marino; Rosolen, Adrian Martin (2013-09)
      Article
      Restricted access - publisher's policy
      We present a Lagrangian phase-field method to study the low Reynolds number dynamics of vesicles embedded in a viscous fluid. In contrast to previous approaches, where the field variables are the phase-field and the fluid ...
    • An atomistic-based finite deformation membrane for single layer crystalline films 

      Arroyo Balaguer, Marino; Belytschko, T (2002-09)
      Article
      Open Access
      A general methodology to develop hyper-elastic membrane models applicable to crystalline films one-atom thick is presented. In this method, an extension of the Born rule based on the exponential map is proposed. The ...
    • 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 ...
    • Approximation of tensor fields on surfaces of arbitrary topology based on local Monge parametrizations 

      Torres Sánchez, Alejandro; Santos Oliván, Daniel; Arroyo Balaguer, Marino (2020-03-15)
      Article
      Restricted access - publisher's policy
      We introduce a new method, the Local Monge Parametrizations (LMP) method, to approximate tensor fields on general surfaces given by a collection of local parametrizations, e.g. as in finite element or NURBS surface ...
    • Blending isogeometric analysis and local maximum entropy meshfree approximants 

      Rosolen, Adrián; Arroyo Balaguer, Marino (2013-09)
      Article
      Open Access
      We present a method to blend local maximum entropy (LME) meshfree approximants and isogeometric analysis. The coupling strategy exploits the optimization program behind LME approximation, treats isogeometric and LME basis ...
    • Cell-based maximum entropy approximants 

      Millán, Raúl Daniel; Sukumar, N; Arroyo Balaguer, Marino (2015-02-01)
      Article
      Open Access
      In this paper, we devise cell-based maximum-entropy (max-ent) basis functions that are used in a Galerkin method for the solution of partial differential equations. The motivation behind this work is the construction of ...
    • Cell-based maximum-entropy approximants 

      Millán, Daniel; Sukumar, N; Arroyo Balaguer, Marino (2015-02-01)
      Article
      Open Access
      In this paper, we devise cell-based maximum-entropy (max-ent) basis functions that are used in a Galerkin method for the solution of partial differential equations. The motivation behind this work is the construction of ...
    • Charting molecular free-energy landscapes with an atlas of collective variables 

      Hashemian, B.; Millán, Raúl Daniel; Arroyo Balaguer, Marino (2016-11-07)
      Article
      Open Access
      Collective variables (CVs) are a fundamental tool to understand molecular flexibility, to compute free energy landscapes, and to enhance sampling in molecular dynamics simulations. However, identifying suitable CVs is ...
    • Coexistence of wrinkles and blisters in supported graphene 

      Zang, Kuan; Arroyo Balaguer, Marino (Elsevier, 2017-07-01)
      Article
      Open Access
      Blisters induced by gas trapped in the interstitial space between supported graphene and the substrate are commonly observed. These blisters are often quasi-spherical with a circular rim, but polygonal blisters are also ...
    • Combined molecular/continuum modeling reveals the role of friction during fast unfolding of coiled-coil proteins 

      Torres Sánchez, Alejandro; Vanegas, Juan Manuel; Purohit, Prashant K.; Arroyo Balaguer, Marino (2019-05-30)
      Article
      Open Access
      Coiled-coils are filamentous proteins that form the basic building block of important force-bearing cellular elements, such as intermediate filaments and myosin motors. In addition to their biological importance, coiled-coil ...
    • Computational evaluation of the flexoelectric effect in dielectric solids 

      Abdollahi Hosnijeh, Amir; Peco Regales, Christian; Millán, Daniel; Arroyo Balaguer, Marino; Arias Vicente, Irene (American Institute of Physics (AIP), 2014-09-07)
      Article
      Restricted access - publisher's policy
      Flexoelectricity is a size-dependent electromechanical mechanism coupling polarization and strain gradient. It exists in a wide variety of materials, and is most noticeable for nanoscale objects, where strain gradients are ...
    • Computing the volume enclosed by a periodic surface and its variation to model a follower pressure 

      Rahimi Lenji, Mohammad; Zhang, Kuan; Arroyo Balaguer, Marino (2015-03-01)
      Article
      Open Access
      In modeling and numerically implementing a follower pressure in a geometrically nonlinear setting, one needs to compute the volume enclosed by a surface and its variation. For closed surfaces, the volume can be expressed ...
    • Confined bilayers passively regulate shape and stress 

      Staykova, M.; Arroyo Balaguer, Marino; Rahimi Lenji, Mohammad; Stone, H.A. (2013-01)
      Article
      Open Access
      Lipid membranes are commonly confined to adjacent subcellular structures or to artificial substrates and particles. We develop an experimental and theoretical framework to investigate the mechanics of confined membranes, ...