Ara es mostren els items 1-20 de 124

  • A four-noded quadrilateral element for composite laminated plates/shells using the refined zigzag theory 

    Eijo, Ariel; Oñate Ibáñez de Navarra, Eugenio; Oller Martínez, Sergio Horacio (John Wiley & Sons, 2013-05-20)
    Article
    Accés restringit per política de l'editorial
    A new bilinear four-noded quadrilateral element (called quadrilateral linear refined zigzag) for the analysis of composite laminated and sandwich plates/shells based on the refined zigzag theory is presented. The element ...
  • A generalized finite-strain damage model for quasi-incompressible hyperelasticity using hybrid formulation 

    Comellas Sanfeliu, Ester; Bellomo, Facundo J.; Oller Martínez, Sergio Horacio (2016-03)
    Article
    Accés obert
    A new generalized damage model for quasi-incompressible hyperelasticity in a total Lagrangian finite-strain framework is presented. A Kachanov-like reduction factor (1 - D) is applied on the deviatoric part of the hyperelastic ...
  • A hierarchical finite element for composite laminated beams using a refined zigzag theory 

    Nallim, Liz G.; Oller Martínez, Sergio Horacio; Oñate Ibáñez de Navarra, Eugenio; Flores, Fernando Gabriel (2017-03)
    Article
    Accés restringit per política de l'editorial
    In this work a kinematics for laminated beams enriched with a refined formulation ZigZag (RZT), originally presented by Tessler et al. in 2007, introduced in a hierarchical one dimensional type “p” finite element is ...
  • A homeostatic-driven turnover remodelling constitutive model for healing in soft tissues 

    Comellas Sanfeliu, Ester; Gasser, Thomas Christian; Bellomo, Facundo J.; Oller Martínez, Sergio Horacio (2016-03)
    Article
    Accés obert
    Remodelling of soft biological tissue is characterized by interacting biochemical and biomechanical events, which change the tissue's microstructure, and, consequently, its macroscopic mechanical properties. Remodelling ...
  • A laminated structural finite element for the behavior of large non-linear reinforced concrete structures 

    Escudero Torres, Cuauhtemoc; Oller Martínez, Sergio Horacio; Martínez García, Javier; Barbat Barbat, Horia Alejandro (2016-10)
    Article
    Accés restringit per política de l'editorial
    In order to correctly predict the kinematics of complex structures, analysis using three-dimensional finite elements (3DFEs) seems to be the best alternative. However, simulation of large multi-layered structures with many ...
  • A localized mapped damage model for orthotropic materials 

    Pelà, Luca; Cervera Ruiz, Miguel; Oller Martínez, Sergio Horacio; Chiumenti, Michèle (2014-05-08)
    Article
    Accés restringit per política de l'editorial
    This paper presents an implicit orthotropic model based on the Continuum Damage Mechanics isotropic models. A mapping relationship is established between the behaviour of the anisotropic material and that of an isotropic ...
  • A micromechanical approach to modeling the effect of impact induced damage on the vibration response of CFRP laminates 

    Pérez Martínez, Marco Antonio; Gil Espert, Lluís; Oller Martínez, Sergio Horacio; Felippa, Carlos (2015)
    Text en actes de congrés
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    This work deals with modeling the effect of low-velocity impact damage upon the vibration response of CFRP laminates through a micro-mechanical description of the induced internal damage. The serial-parallel (SP) continuum ...
  • A new damage model for structures subjected to cyclic loads 

    Barbat Barbat, Horia Alejandro; Oller Martínez, Sergio Horacio; Paredes, Jairo Andrés (2010)
    Text en actes de congrés
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    The structures subjected to dynamic loads often show alternative tensioncompression states stress; in such a case, even if certain damage (fracture) is reached during the tension cycle, the structure should maintain its ...
  • A numerical approach to simulate the behavior of fiber reinforced composite materials 

    Car, Eduardo J.; Oller Martínez, Sergio Horacio; Oñate Ibáñez de Navarra, Eugenio (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2000)
    Text en actes de congrés
    Accés obert
  • A numerical model of delamination in composite laminated beams using the LRZ beam element based on the refined zigzag theory 

    Eijo, Ariel; Oñate Ibáñez de Navarra, Eugenio; Oller Martínez, Sergio Horacio (2013-10)
    Article
    Accés restringit per política de l'editorial
    A method based on the Refined Zigzag Theory (RZT) to model delamination in composite laminated beam structures is presented. The novelty of this method is the use of one-dimensional finite elements to discretize the geometry ...
  • A river bed hydrokinetic turbine: a laminated composite material rotor design 

    Oller Aramayo, Sergio A.; Nallim, Liz G.; Oller Martínez, Sergio Horacio; Martínez García, Javier (International Centre for Numerical Methods in Engineering (CIMNE), 2017)
    Llibre
    Accés obert
    This chapter presents the composite materials applied to Water Current Turbine (WCT) hydrokinetic turbines. Here will be briefly described the features of these turbines, the fluid-dynamic behavior of the rotor, and its ...
  • A stress driven growth model for soft tissue considering biological availability 

    Oller Martínez, Sergio Horacio; Bellomo, F.J; Armero, Francisco; Nallim, L.G. (2011)
    Text en actes de congrés
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    Some of the key factors that regulate growth and remodeling of tissues are fundamentally mechanical. However, it is important to take into account the role of bioavailability together with the stresses and strains in the ...
  • A Viscoplastic constitutive model with strain rate variables for asphalt mixtures’ numerical simulation 

    González Lopez, Jose Manuel; Miquel Canet, Juan; Oller Martínez, Sergio Horacio; Miró Recasens, José Rodrigo (Elsevier, 2007)
    Article
    Accés obert
    The study and development of recycling techniques for pavements is an increasing activity in engineering nowadays. This research line demands a more realistic characterization of the material properties with the aim of ...
  • A viscoplastic model with strain rate constitutive parameters for asphalt mixtures' response simulation 

    González Lopez, Jose Manuel; Miquel Canet, Juan; Oller Martínez, Sergio Horacio (2005)
    Text en actes de congrés
    Accés obert
    The mechanical behavior of the asphalt pavements is a complex phenomenon conditioned by the heterogeneity of the asphalt composite material. Experimental tests in the laboratory show a clear strain rate dependency in the ...
  • Advanced composite material simulation 

    Oller Martínez, Sergio Horacio; Martínez, X; Barbat Barbat, Horia Alejandro; Rastellini, F (2008-01)
    Article
    Accés obert
    A computational methodology is presented for modeling the non-linear mechanical behavior of composite structures made of FRP (Fiber-Reinforced Polymers) laminates. The model is based on the appropriate combination of the ...
  • Advanced composite material simulation 

    Oller Martínez, Sergio Horacio; Martínez, X; Barbat Barbat, Horia Alejandro; Rastellini, F (2008)
    Text en actes de congrés
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    A computational methodology is presented for modelling the material non-linear mechanical behaviour of composite structures made of FRP (Fibre-Reinforced Polymers) laminates. The model is based on the appropriate combination ...
  • An efficient multi-scale method for non-linear analysis of composite structures 

    Otero Gruer, Fermín Enrique; Martínez García, Javier; Oller Martínez, Sergio Horacio; Salomon Rotlisbeger, Ramon Omar (2015-11-01)
    Article
    Accés obert
    The use of multi-scale procedures is encouraged by the continuous increase of computational capacity, but it is still a challenge performing a non-linear analysis of real composite structures without the aid of large ...
  • An enriched macro finite element for the static analysis of thick general quadrilateral laminated composite plates 

    Rango, Rita F.; Nallim, Liz G.; Oller Martínez, Sergio Horacio (2016-10)
    Article
    Accés restringit per política de l'editorial
    This article presents the formulation of an enriched macro finite element based on the trigonometric shear deformation theory for the static analysis of symmetrically laminated composite plates. Shear correction factor is ...
  • An integrated procedure for the structural design of a composite rotor-hydrofoil of a Water Current Turbine (WCT) 

    Oller Aramayo, Sergio A.; Nallim, Liz G.; Oller Martínez, Sergio Horacio (2013-12)
    Article
    Accés restringit per política de l'editorial
    This paper shows an integrated structural design optimization of a composite rotor-hydrofoil of a water current turbine by means the finite elements method (FEM), using a Serial/Parallel mixing theory (Rastellini et al. ...
  • An inverse approach for the mechanical characterisation of vascular tissues via a generalised rule of mixtures 

    Bellomo, Facundo; Oller Martínez, Sergio Horacio; Nallim, Liz (Gordon and Breach Science Publishers, 2012-12)
    Article
    Accés restringit per política de l'editorial
    Mechanical factors such as stresses and strains play a major role in the growth and remodelling of soft biological tissues. The main constituents of tissue undergo different processes reacting to mechanical stimulus. ...