Now showing items 1-20 of 367

    • A blended shifted-fracture/phase-field framework for sharp/diffuse crack modeling 

      Li, Kangan; Rodríguez Ferran, Antonio; Scovazzi, Guglielmo (2023-02-28)
      Article
      Open Access
      The shifted fracture method (SFM) is an embedded method that enables sharp crack representations while using mesh-fitted data structures. In the SFM, the true crack is embedded in the computational grid, but the crack ...
    • A boundary algebraic formulation for plane strain elastodynamic scattering 

      Poblet-Puig, Jordi; Shanin, Andrey (Society for Industrial and Applied Mathematics (SIAM), 2018)
      Article
      Open Access
      Solving of elastodynamic problems arises in many scientific fields such as wave propagation in the ground, non-destructive testing, vibration design of buildings, or vibroacoustics in general. An integral formulation based ...
    • 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 comparative study on homogenization strategies for multi-scale analysis of materials 

      Ortolano González, José María; Hernández Ortega, Joaquín Alberto; Oliver Olivella, Xavier (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2013-02-01)
      Book
      Open Access
      One of the most important engineering tasks over the years has been the design and manufacture of increasingly sophisticated structural materials as a result of the requirements related to the technological progress. In ...
    • A complementary energy approach accommodates scale differences in soft tissues 

      Sáez Viñas, Pablo; Eppell, Steven J.; Ballarini, Roberto; Rodríguez Matas, José Félix (2020-05-01)
      Article
      Open Access
      The mechanics of biological entities, from single molecules to the whole organ, has been extensively analyzed during the last decades. At the smaller scales, statistical mechanics has fostered successful physical models ...
    • A computational model for early cell spreading, migration, and competing taxis 

      Betorz Llobet, Joel; Bokil, Gaurav Rajendra; Deshpande, Shreyas M.; Kulkarnic, Shardool; Araya Matilla, Daniel Rolando; Venturini, Chiara; Sáez Viñas, Pablo (Elsevier, 2023-10)
      Article
      Open Access
      Cell motility represents one of the most fundamental functions in life such as organ development or tissue regeneration and diseases such as cancer. Here, we derived a computational model of cell motility that incorporates ...
    • A face-centred finite volume approach for coupled transport phenomena and fluid flow 

      Burcet Rodríguez, Martí; Oliveira, Beñat; Afonso, Juan Carlos; Zlotnik, Sergio (2024-01-01)
      Article
      Open Access
      We present a particular derivation of the face-centred finite volume (FCFV) method and study its performance in non-linear, coupled transport problems commonly encountered in geoscientific and geotechnical applications. ...
    • 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 four-noded quadrilateral element for composite laminated plates/shell using the refined zigzag theory 

      Oñate Ibáñez de Navarra, Eugenio; Oller Martínez, Sergio Horacio; Eijo, Ariel (2012-06)
      Research report
      Open Access
      A new bilinear 4-noded quadrilateral element (called QLRZ) for the analysis of composite laminated and sandwich plates/shells based on the refined zigzag theory (RZT) proposed by Tessler et al. [1] is presented. The element ...
    • A general methodology for deriving shear contrained Reissner Mindlin plate elements 

      Oñate Ibáñez de Navarra, Eugenio; Zienkiewicz, Olgierd Cecil; Suárez Arroyo, Benjamín; Taylor, R.L. (1990-06)
      Research report
      Open Access
    • A genetic algorithm optimized fractal model to predict the constriction resistance from surface roughness measurements 

      Capelli, Francesca; Riba Ruiz, Jordi-Roger; Rupérez de Gracia, Elisa; Sanllehí, Josep (2017-06-09)
      Article
      Open Access
      The electrical contact resistance greatly influences the thermal behavior of substation connectors and other electrical equipment. During the design stage of such electrical devices, it is essential to accurately predict ...
    • A new bipenalty formulation for ensuring time step stability in time domain computational dynamics 

      Hetherington, Jack; Rodríguez Ferran, Antonio; Askes, Harm (John Wiley & Sons, 2012-04-20)
      Article
      Open Access
    • A new computational tool for non-linear multi-material Continuum Mechanics 

      Antonio Javier, Gil; Chun Hean, Lee; Huerta, Antonio; Matteo, Giacomini; Javier, Bonet (Scipedia, 2019)
      Conference lecture
      Restricted access - publisher's policy
    • A second-order face-centred finite volume method for elliptic problems 

      Vieira, Luan M.; Giacomini, Matteo; Sevilla Cárdenas, Rubén; Huerta, Antonio (2020-01-01)
      Article
      Open Access
      A second-order face-centred finite volume method (FCFV) is proposed. Contrary to the more popular cell-centred and vertex-centred finite volume (FV) techniques, the proposed method defines the solution on the faces of the ...
    • 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 stable XFEM formulation for multi-phase problems enforcing the accuracy of the fluxes through Lagrange multipliers 

      Díez, Pedro; Cottereau, Régis; Zlotnik, Sergio (2013-11-02)
      Article
      Open Access
      When applied to diffusion problems in a multi-phase setup, the popular extended finite element method (XFEM) strategy suffers from an inaccurate representation of the local fluxes in the vicinity of the interface. The XFEM ...
    • A stochastic model for soft tissue failure using acoustic emission data 

      Sánchez Molina, David; Martínez González, Eva; Velázquez Ameijide, Juan; Llumà Fuentes, Jordi; Rebollo Soria, María Carmen; Arregui Dalmases, Carlos (2015-07-15)
      Article
      Open Access
      The strength of soft tissues is due mainly to collagen fibers. In most collagenous tissues, the arrangement of the fibers is random, but has preferred directions. The random arrangement makes it difficult to make deterministic ...
    • 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 ...
    • Additioning alfa fibres in cement mortar 

      Bernat Masó, Ernest; Puigvert Cobos, Francesc; Abdelmoulac, Hichem; Gil Espert, Lluís (Universidad Católica de Chile (UC), 2018)
      Article
      Open Access
      Cement mortar is a broadly used construction material. Adding fibres into the fresh mortar is an effective reinforcing technique to overcome the drawbacks related with the little tensile and flexural strength. Using natural ...