Ara es mostren els items 17-36 de 50

    • Damage diagnosis in concrete dams with presented expansive damage based on medical propaedeutics 

      Pardo Bosch, Francesc; Aguado de Cea, Antonio (2017-10)
      Article
      Accés obert
      The maintenance of dams is crucial because of their social, environmental, and economic relevance. However, more than 40% of the world’s dams are more than 40 years old. Furthermore, because of their ageing, damage such ...
    • Damage Index for structures with elements of high flexural stiffness and/or brittle behavior 

      Hidalgo Leiva, Diego Antonio; Pujades Beneit, Lluís; Barbat Barbat, Horia Alejandro; Díaz, Sergio Alberto; Vargas Alzate, Yeudy Felipe; Pinzón Ureña, Luis (2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Structures with high lateral stiffness and/or with brittle to semi-brittle elements in their lateral resistant system may exhibit a rapid decrease of their shear capacity and a sudden loss of stiffness when lateral cyclic ...
    • Damage plastic model for concrete failure under impulsive loadings 

      Guilbaud, Daniel (CIMNE, 2015)
      Comunicació de congrés
      Accés obert
      The IRIS 2012 benchmark [1] was devoted to compare various modelling of impact on reinforced concrete slabs. Its aim was to improve the methods used and to provide guidance to assess the integrity of structures impacted ...
    • Deep neural networks for the estimation of masonry structures failures under rockfalls 

      Mavrouli, Olga; Skentou, Athanasia D.; Carbonell Puigbó, Josep Maria; Tsoukalas, Markos Z.; Núñez Andrés, María Amparo; Asteris, Panagiotis G. (2023-05-24)
      Article
      Accés obert
      Although the principal aim of the rockfall management is to prevent rock boulders from reaching the buildings instead of the buildings resisting the boulder impacts, there usually exists a residual risk that has to be ...
    • Determination of the state of health of Li-ion batteries : the irreversible entropy production approach 

      Ovejas Benedicto, Victòria Júlia (Universitat Politècnica de Catalunya, 2017-11-24)
      Tesi
      Accés obert
      In recent years, portable applications have experienced an exponential growth and consequently, the demand of batteries has increased accordingly. It is widely known, though, that the performance of batteries decreases ...
    • Efficient constitutive model for continuous micro-modeling of masonry structures 

      Petracca, Massimo; Camata, Guido; Spacone, Enrico; Pelà, Luca (2023-01)
      Article
      Accés obert
      Masonry is a composite material often modeled as an equivalent homogenous material. However, the complexity of its micro-structure leads to complex mechanical responses, which are almost impossible to capture accurately ...
    • Entropy characterisation of overstressed capacitors for lifetime prediction 

      Cuadras Tomàs, Àngel; Romero, Ramón; Ovejas Benedicto, Victòria Júlia (2016-12-30)
      Article
      Accés obert
      We propose a method to monitor the ageing and damage of capacitors based on their irreversible entropy generation rate. We overstressed several electrolytic capacitors in the range of 33 µF–100 µF and monitored their entropy ...
    • Evaluation of seismic damage in low-rise buildings of reinforced concrete masonry 

      Hidalgo-Leiva, D.A.; Pujades Beneit, Lluís; Barbat Barbat, Horia Alejandro; Díaz-Alvarado, S.A.; Vargas Alzate, Yeudy Felipe (2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The assessment of damage caused by earthquakes in structures, requires the use of nonlinear analysis, either static or dynamic, in order to define the performance of the buildings for the considered hazard levels. In this ...
    • Failure pressure analysis of a nuclear reactor prestressed concrete containment building 

      Jiménez Reyes, Sergio; Cornejo Velázquez, Alejandro; Barbu, Lucia Gratiela; Barbat Barbat, Horia Alejandro; Oller Martínez, Sergio Horacio (Elsevier, 2021-06)
      Article
      Accés obert
      The failure analysis of an existing and operational nuclear power plant reactor containment building subjected to an accident internal pressure is studied in this paper. The computation is based on the Finite Element Method ...
    • Finite element analysis of compressive failure in stiffened carbon fiber panels 

      Torrent Collell, Jordi (Universitat Politècnica de Catalunya, 2011-09-29)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      The use of composite materials in the aerospace industry is experiencing a large increase in recent years. Mainly they are used to build commercial aircraft fuselages. COCOMAT project had aimed to study and to improve ...
    • Finite element modeling of quasi-brittle cracks in 2D and 3D with enhanced strain accuracy 

      Cervera Ruiz, Miguel; Barbat Vlad, Gabriel; Chiumenti, Michele (2017-11)
      Article
      Accés obert
      This paper discusses the finite element modeling of cracking in quasi-brittle materials. The problem is addressed via a mixed strain/displacement finite element formulation and an isotropic damage constitutive model. The ...
    • From continuum mechanics to fracture mechanics: the strong discontinuity approach 

      Oliver Olivella, Xavier; Huespe, Alfredo Edmundo; Gómez Pulido, M. Dolores; Chaves, E (2002-01)
      Article
      Accés obert
      The paper deals with the strong discontinuity approach and shows the links with the decohesive fracture mechanics provided by that approach. On the basis of 1D continuum damage models it is shown that, by introducing some ...
    • Global costs of protecting against sea-level rise at 1.5°C to 4.0°C 

      Brown, Sally; Jenkins, Katie; Goodwin, Philip; Lincke, Daniel; Vafeidis, Athanasios T.; Tol, Richard S. J.; Jenkins, Rhosanna; Warren, Rachel; Nicholls, Robert J.; Jevrejeva, Svetlana; Sánchez-Arcilla Conejo, Agustín; Haigh, Ivan D. (2021-07)
      Article
      Accés obert
      Sea-levels will rise, even with stringent climate change mitigation. Mitigation will slow the rate of rise. There is limited knowledge on how the costs of coastal protection vary with alternative global warming levels of ...
    • Image processing, Time of Flight cameras and Sheet of light combination and "Road damage evaluation" 

      Perarnau Margarit, Eduard (Universitat Politècnica de Catalunya, 2016-04-08)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      Since the first day in Antwerp, I wanted to work in automotive world, my promoter, Dr. Luc Mertens motivated me about the world of the cameras and their applications. It was a new topic for me, but I think that the vision ...
    • Indentation and scratch testing of a WC-6%wtCo cemented carbide: Corrosion effects on load-bearing capability and induced damage 

      Zheng, Yafeng; Fargas Ribas, Gemma; Lavigne, Olivier; Llanes Pitarch, Luis Miguel (2020-04-10)
      Article
      Accés obert
      In this work, corrosion effects on the indentation and scratch response of a WC-6%Co hardmetal are investigated. Experimental variables include relative long corrosion times as well as indentation and scratch testing ...
    • Microplane model M7 for plain concrete. I: Formulation 

      Caner, Ferhun Cem; Bažant, Zdeněk Pavel (American Society of Civil Engineers (ASCE), 2013-12-01)
      Article
      Accés restringit per política de l'editorial
      Mathematical modeling of the nonlinear triaxial behavior and damage of such a complexmaterial as concrete has been a long-standing challenge in which progress has been made only in gradual increments. The goal of this ...
    • 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)
      Text en actes de congrés
      Accés obert
      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 ...
    • Modeling of the behavior in high-cycle fatigue based on the coupling plasticity-damage in a mesoscopic scale 

      Messellek, A. C.; Belouchrani, M. E. A. (CIMNE, 2015)
      Comunicació de congrés
      Accés obert
      The methods of prediction of lifespan in high cycle fatigue are under development since decades and are used by engineers to dimension the structures. The purpose of the work presented in this paper is to establish a ...
    • Numerical modelling of masonry shear walls failure mechanisms 

      Drougkas, Anastasios; Pelà, Luca; Roca Fabregat, Pedro (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents an investigation on the ability of two alternative FE-based numerical methods to simulate the in-plane strength and collapse of brick masonry shear walls. The methods considered consist of a meso-model, ...
    • On the discrete constitutive models induced by strong discontinuity kinematics and continuum constitutive equations 

      Oliver Olivella, Xavier (2000-11)
      Article
      Accés obert
      On the basis of continuum constitutive models (stress vs. strain), the introduction of strong discontinuity kinematics (considering jumps in the displacement fields across a discontinuity interface) induces projected ...