Now showing items 21-40 of 41

  • Large scale validation of a new isotropic hardening law for the barcelona plastic damage model under ultra low cycle fatigue conditions 

    Barbu, Lucia Gratiela; Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro (CIMNE, 2015)
    Conference report
    Open Access
    This paper presents the results of finite element simulations made on a bent pipe subjected to an in-plane variable cyclic displacement combined with internal pressure. The results of the numerical analyses will be compared ...
  • Methodology for the analysis of post-tensioned structures using a constitutive serial-parallel rule of mixtures 

    Cornejo, Alejandro; Barbu, Lucia Gratiela; Escudero Torres, Cuauhtemoc; Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro (2018-09)
    Article
    Restricted access - publisher's policy
    The main purpose of this paper is to develop a reliable method based on a three-dimensional (3D) finite-element (FE) model to simulate the constitutive behaviour of reinforced concrete structures strengthened with ...
  • Methodology for the analysis of post-tensioned structures using a constitutive serial-parallel rule of mixtures: large scale non-linear analysis 

    Barbu, Lucia Gratiela; Cornejo Velázquez, Alejandro; Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro (2019-05)
    Article
    Restricted access - publisher's policy
    The main purpose of this paper is to develop a reliable method based on a three-dimensional (3D) finite-element (FE) model to simulate the constitutive behaviour of reinforced concrete structures strengthened with ...
  • Modelling the elastic behaviour of carbon nanotube-reinforced composites 

    Otero-Gruer, Fermín; Oller Martínez, Sergio Horacio; Martínez García, Javier; Salomón, Ramón Omar (2011)
    Conference report
    Restricted access - publisher's policy
    Carbon nanotubes (CNTs), since their discovery by Lij ima in 1991 [1], are considered a new generation of reinforcement [2]. Their "nano" size structure makes them potentially free of defects, which provides them with ...
  • Modelling viscoelastic behaviour of carbón nanotube-reinforced thermo-plastics 

    Otero Gruer, Fermín Enrique; Oller Martínez, Sergio Horacio; Martínez García, Javier; Salomón, Ramón Omar (Asociación Argentina de Mecánica Computacional, 2012)
    Conference report
    Open Access
    Carbon nanotubes (CNTs), since their discovery by Lijima (S. Lijima, Nature, 354:56-58 (1991)), are considered a new generation of reinforcement. Their "nano" size structure makes them potentially free of defects, which ...
  • Model-wise algorithm for the resolution of fatigue problems 

    Barbu, Lucia Gratiela; Oller Martínez, Sergio Horacio; Martínez García, Javier; Barbat Barbat, Horia Alejandro (CIMNE, 2015)
    Conference report
    Open Access
    The present work presents a general constitutive model formulation and a numerical algorithm for automatically selecting the appropriate coupling of damage and plasticity as a function of the number of cycles the material ...
  • Multiscale computational homogenization 

    Otero Gruer, Fermín Enrique; Oller Martínez, Sergio Horacio; Martínez García, Javier (Centro de Investigación en Matemáticas, 2017)
    Part of book or chapter of book
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  • Multiscale computational homogenization: review and proposal of a new enhanced-first-order method 

    Otero Gruer, Fermín Enrique; Oller Martínez, Sergio Horacio; Martínez García, Javier (2018-04)
    Article
    Open Access
    The continuous increase of computational capacity has encouraged the extensive use of multiscale techniques to simulate the material behaviour on several fields of knowledge. In solid mechanics, the multiscale approaches ...
  • Multiscale numerical modelling of microstructured reinforced composites 

    Otero Gruer, Fermín Enrique; Oller Martínez, Sergio Horacio; Martínez García, Javier (International Centre for Numerical Methods in Engineering (CIMNE), 2016)
    Book
    Open Access
    Most of the existing materials around us can be considered composite materials, since they are composed by several phases or components at certain spatial scale. The physical and chemical properties of composites, as occurs ...
  • Multiscale thermo-mechanical analysis of multi-layered coatings in solar thermal applications 

    Montero-Chacón, Francisco; Zaghi, Stefano; Rossi, Riccardo; García-Pérez, Elena; Heras Pérez, Irene; Martínez García, Javier; Oller Martínez, Sergio Horacio; Doblaré, Manuel (2017-05)
    Article
    Open Access
    Solar selective coatings can be multi-layered materials that optimize the solar absorption while reducing thermal radiation losses, granting the material long-term stability. These layers are deposited on structural materials ...
  • Numerical analysis of interlaminar stresses in open-hole laminates under compression 

    Solis, A.; Sanchez Saez, S.; Martínez García, Javier; Barbero Pozuelo, Enrique (2019-06-01)
    Article
    Restricted access - publisher's policy
    In this paper, the interlaminar stresses in open-hole laminates subjected to compressive loads are analysed using a numerical model. This model implements the Serial/Parallel Mixing Theory (S/PMT) and a Continuum Damage ...
  • Numerical homogenization for composite materials analysis: comparison with other micro mechanical formulations 

    Otero Gruer, Fermín Enrique; Oller Martínez, Sergio Horacio; Martínez García, Javier; Salomón, Ramón Omar (2015-04)
    Article
    Open Access
    This work presents a two-scale homogenization procedure to analyze three dimension composite structures by FEM. The theory implemented is compared with other micro-structural formulations: micro models and serial parallel ...
  • Numerical modelling of behaviour of carbon nanotube-reinforced composites 

    Otero-Gruer, Fermín; Oller Martínez, Sergio Horacio; Martínez García, Javier; Salomón, Ramón Omar (Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2011)
    Conference report
    Open Access
    Since their discovery by Lijima in 1991[1], carbon nanotubes (CNTs), are considered a new generation of reinforcement [2]. Their "nano" size structure makes them potentially free of defects, which provides them with ...
  • Numerical tool to study structural reinforcement of steel reinforced concrete (RC) structures under seismic loads using fiber reinforced polymers (FRP) 

    Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro (2007-09-03)
    Conference lecture
    Restricted access - publisher's policy
    Strengthening or retrofitting existing structures in order to increase their ductility and improve their seismic response has traditionally been accomplished using conventional materials and construction techniques. Composite ...
  • Outlook on ecologically improved composites for aviation interior and secondary structures 

    Bachmann, Jens; Yi, Xiaosu; Gong, Hugh; Martínez García, Javier; Bugeda Castelltort, Gabriel; Oller Martínez, Sergio Horacio; Tserpes, Konstantinos; Ramon, Eric; Paris, Christophe; Moreira, Pedro; Fang, Zhengping; Li, Yan; Liu, Yanfeng; Liu, Xiaoqing; Xian, Guijun; Tong, Jianfeng; Wei, Jiahu; Zhang, Xufeng; Zhu, Jin; Ma, Songqi; Yu, Tao (Springer, 2018-04-24)
    Article
    Open Access
    Today, mainly man-made materials such as carbon and glass fibres are used to produce composite parts in aviation. Renewable materials such as natural fibres or bio-sourced resin systems have not found their way into aviation, ...
  • Procedures based on composite FEM technology for the resolution of concrete-framed structures with masonry in-fills: comparison with Mexican building code 

    Escudero Torres, Cuauhtemoc; Oller Martínez, Sergio Horacio; Martínez García, Javier; Barbat Barbat, Horia Alejandro (American Society of Civil Engineers (ASCE), 2017-09)
    Article
    Open Access
    The construction of confined masonry buildings has become a good choice to meet the housing needs of low-income families inbig cities. Despite this, current building codes for such construction allow the use of highly ...
  • Reliability design methodology for confined high pressure inflatable structures 

    Barbero, Ever; Sosa, Eduardo; Martínez García, Javier; Gutierrez, J.M. (2013-02-19)
    Article
    Restricted access - publisher's policy
    A design methodology for high pressure, inflatable structures is proposed. The inflatable structure may be partially confined inside large diameter conduits and tunnels. The design addresses the main structural requirements ...
  • Stepwise advancing strategy for the simulation of fatigue problems 

    Barbu, Lucia Gratiela; Oller Martínez, Sergio Horacio; Martínez García, Javier; Barbat Barbat, Horia Alejandro (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2013)
    Conference report
    Open Access
    A time advance strategy for cyclic loading will be presented, applied to the fatigue formulation first proposed by [1].The coupling of both formulations provides a comprehensive approachto simulate high cycle fatigue ...
  • Strategy for an efficient material non-linear multiscale analysis 

    Martínez García, Javier; Otero Gruer, Fermín Enrique; Oller Martínez, Sergio Horacio (2015)
    Conference report
    Open Access
    As the internal microstructure of composite materials becomes more complex, multi-scale methods are gaining strength. These allow obtaining the material performance from the analysis of a representative volume element. The ...
  • Thermo-mechanical homogenization of composite materials 

    Zaghi, Stefano; Martínez García, Javier; Rossi, Riccardo; Oller Martínez, Sergio Horacio (Asociación Española de Materiales Compuestos, 2015)
    Conference report
    Open Access