Now showing items 1-20 of 41

  • A communication-based algorithm to avoid the human body effect on antennas 

    Martínez García, Javier (Universitat Politècnica de Catalunya, 2011-07-21)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Qing hua da xue
    English: The aim of this project is to design and implement a simple and reliable system able to minimize the negative effect that users cause on the antenna performance of mobile devices when interacting with these. The ...
  • Adaptive and off-line techniques for non-linear multiscale analysis 

    Zaghi, Stefano; Martínez García, Javier; Rossi, Riccardo; Petracca, Massimo (2018-08-22)
    Article
    Open Access
    This paper presents two procedures, based on the numerical multiscale theory, developed to predict the mechanical non-linear response of composite materials under monotonically increasing loads. Such procedures are designed ...
  • 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
    Open Access
    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 ...
  • Análisis no-lineal de materiales compuestos mediante la teoría de mezclas serie-paralelo 

    Martínez García, Javier; Oller Martínez, Sergio Horacio; Rastellini, Fernando G. (OmniaScience, 2014)
    Part of book or chapter of book
    Open Access
    Este libro presenta una panorámica del estado actual de los materiales compuestos y sus aplicaciones más relevantes en la obra civil y la edificación.
  • Análisis numérico de estructuras de hormigón reforzadas con FRP por medio de la teoría de mezclas serie/paralelo 

    Molina, Maritzabel; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro; Martínez García, Javier (Universitat Politècnica de Catalunya. CIMNE, 2010)
    Article
    Open Access
    La simulación numérica del comportamiento de los materiales compuestos es un campo en desarrollo cuya aplicación a estructuras ha experimentado avances importantes que han conducido a mejoras en el refuerzo de las mismas. ...
  • Análisis numérico de la reparación y refuerzo de estructuras con FRP 

    Oller Martínez, Sergio Horacio; Molina, Maritzabel; Vielma Pérez, Juan Carlos; Martínez García, Javier; Barbat Barbat, Horia Alejandro; Nallim, Liz G. (OmniaScience, 2014)
    Part of book or chapter of book
    Open Access
    Este libro presenta una panorámica del estado actual de los materiales compuestos y sus aplicaciones más relevantes en la obra civil y la edificación.
  • Analysis of pre-tensioned structures by means of a constitutive Serial-Parallel rule of mixtures 

    Barbu, Lucia Gratiela; Escudero Torres, Cuauhtemoc; Cornejo Velázquez, Alejandro; Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro (2017)
    Conference report
    Open Access
    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 ...
  • Analysis of ultra low cycle fatigue problems with the Barcelona plastic damage model 

    Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbu, Lucia Gratiela; Barbat Barbat, Horia Alejandro (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2013)
    Conference report
    Open Access
    This paper presents a plastic formulation based on the Barcelona plastic damage model capable of predicting the material failure due to Ultra Low Cycle Fatigue. This is achieved taking into account the fracture energy ...
  • Analysis of Ultra Low Cycle Fatigue problems with the Barcelona plastic damage model and a new isotropic hardening law 

    Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbu, Lucia Gratiela; Barbat Barbat, Horia Alejandro; de Jesus, A.M.P. (2015-04)
    Article
    Open Access
    This paper presents a plastic-damage formulation and a new isotropic hardening law, based on the Barcelona plastic damage model initially proposed by Lubliner et al. (1989) [1], which is capable of predicting steel failure ...
  • 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
    Open Access
    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 ...
  • Application of the serial/parallel mixing theory to the seismic analysis of RC structures reinforced with FRP 

    Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro; Martínez García, Javier (2007-07-12)
    Conference report
    Open Access
    Strengthening or retrofitting of existing structures in order to increase their ductility and improve their seismic response has traditionally been accomplished using conventional materials and constructions techniques. ...
  • 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)
    Book
    Open Access
    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 ...
  • Caracterización de la delaminación en materiales compuestos mediante la teoría de mezclas serie/paralelo 

    Martínez García, Javier; Oller Martínez, Sergio Horacio; Barbero, E. (Universitat Politècnica de Catalunya. CIMNE, 2011)
    Article
    Open Access
    Este artículo presenta un nuevo procedimiento con el que simular el fallo por delaminación en materiales compuestos. El método propuesto utiliza la teoría de mezclas serie/paralelo, desarrollada por Fernando Rastellini, ...
  • Coupled plastic damage model for low and ultra-low cycle seismic fatigue 

    Barbu, Lucia Gratiela; Oller Martínez, Sergio Horacio; Martínez García, Javier; Barbat Barbat, Horia Alejandro (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
    Conference report
    Open Access
    This paper presents the theoretical framework for a coupled plastic damage constitutive model valid for materials subjected to cyclic loads that lead to low and ultra-low cycle fatigue. Two numerical examples were presented ...
  • Editorial 

    Martínez García, Javier; Verdejo, Raquel (2017-10-23)
    Article
    Open Access
  • Guidelines for seismic vulnerability reduction in the urban environment: LESSLOSS report no. 2007/04 

    Oller Martínez, Sergio Horacio; Barbat Barbat, Horia Alejandro; Mata Almonacid, Pablo; Martínez García, Javier (IUSS Press, 2007-07)
    Book
    Restricted access - publisher's policy
  • High-cycle fatigue constitutive model and a load-advance strategy for the analysis of unidirectional fiber reinforced composites subjected to longitudinal loads 

    Barbu, Lucia Gratiela; Oller Martínez, Sergio Horacio; Martínez García, Javier; Barbat Barbat, Horia Alejandro (2019-07)
    Article
    Restricted access - publisher's policy
    A fatigue constitutive model valid for the composite constituent will be presented in this paper. The composite behaviour will be obtained by means of the serial/parallel mixing theory that is also used as a constitutive ...
  • High cycle fatigue simulation: a new stepwise load-advancing strategy 

    Barbu, Lucia Gratiela; Oller Martínez, Sergio Horacio; Martínez García, Javier; Barbat Barbat, Horia Alejandro (2015-08)
    Article
    Open Access
    A stepwise load-advancing strategy for cyclic loading will be presented in this paper that yields convergence in reasonable computational time for highly nonlinear behaviour occurring past the S–N curve. The algorithm is ...
  • High-quality crystalline optical nanoantennas 

    Martínez García, Javier (Universitat Politècnica de Catalunya, 2012-09-10)
    Master thesis
    Open Access
    [ANGLÈS] Nowadays there is an increasing interest in high resolution nanopatterning of plasmonic structures. Several approaches mainly based on thermal evaporation of poly-crystalline metallic films are limited by the ...
  • Impact damage prediction in carbon fiber-reinforced laminated composite using the matrix-reinforced mixing theory 

    Pérez Martínez, Marco Antonio; Martínez García, Javier; Oller Martínez, Sergio Horacio; Gil Espert, Lluís; Rastellini, Fernando G.; Flores, Fernando (2013-10-01)
    Article
    Open Access
    The impact damage tolerance of fiber-reinforced laminated composite materials is a source of concern, mainly due to internal induced damage which causes large reductions on the strength and stability of the structure. This ...