Ara es mostren els items 1-19 de 19

    • Computational modeling and rational design of flexoelectric metamaterials and devices 

      Mocci, Alice (Universitat Politècnica de Catalunya, 2021-07-22)
      Tesi
      Accés obert
      Piezoelectricity, the two-way coupling between electric polarization and strain is the basic mechanism behind most electromechanical transduction technologies. It is possible only in a limited number of materials, namely ...
    • Development of mechanism-based models for resistance spot weld failure simulation of multi-material advanced high strength steel sheets 

      Dorribo Dorribo, Daniel (Universitat Politècnica de Catalunya, 2017-12-05)
      Tesi
      Accés obert
      The automotive industry is constantly involved in the development of new projects aimed at reducing weight, fuel consumptions and costs while improving passengers' safety. In order to achieve these increasing demands, ...
    • Effect of flexoelectricity on elasticity characterization by nanoindentation 

      Shaikh, Salik Firdos (Universitat Politècnica de Catalunya, 2017-06-16)
      Projecte Final de Màster Oficial
      Accés obert
      Flexoelectricity is a very common phenomenon in dielectrics and is a size-dependent electromechanical mechanism coupling polarization and strain gradient. Flexoelectric effect is significant due to higher strain gradients ...
    • Flexoelectric effect in non-homogenous dielectrics 

      Serrahima i Serra, Sergi (Universitat Politècnica de Catalunya, 2022-06)
      Projecte Final de Màster Oficial
      Accés obert
      Flexoelectricity is a different electromechanical coupling without this material symmetry limitations, hence universal for all dielectrics. Flexoelectricity relies on symmetry breaking beyond the material chemistry by ...
    • Flexoelectric metamaterials optimization 

      Khaloian Sarnaghi, Aren (Universitat Politècnica de Catalunya, 2021-09-13)
      Projecte Final de Màster Oficial
      Accés obert
      Electromechanical couplings play an important role in our day to day lives, as they are present in both natural biological systems and technological applications. Piezoelectricity, the two way coupling between strain and ...
    • Flexoelectricity at surface instabilities and stress singularities 

      Mohammadi, Hossein (Universitat Politècnica de Catalunya, 2023-06-16)
      Tesi
      Accés obert
      (English) The flexoelectric effect, the two-way linear coupling between strain gradient and electric polarization (direct flexoelectricity) or electric field gradient and strain (converse flexoelectricity) universally ...
    • Flexoelectricity in nanobeams under torsion 

      Moliner Martinez, Jordi (Universitat Politècnica de Catalunya, 2016-06-23)
      Treball Final de Grau
      Accés obert
      We will study the effect of flexoelectricity in the electromechanical response of nanobeams under torsion.
    • High performance computing for flexoelectric devices 

      Manyer Fuertes, Jordi (Universitat Politècnica de Catalunya, 2020-10)
      Projecte Final de Màster Oficial
      Accés obert
      This exiting development requires a robust mathematical and computational framework for solving flexoelectric boundary value problems, mathematically a coupled system of 4th-order partial differential equations, in general ...
    • Mathematical and computational modeling of flexoelectricity at fixed and moving interfaces, fracture surfaces and contact 

      Barceló Mercader, Jordi (Universitat Politècnica de Catalunya, 2023-09-08)
      Tesi
      Accés obert
      (English) Flexoelectricity is a two-way coupling between strain gradient and polarisation or strain and polarization-gradient. Harnessing flexoelectricity as a functional property requires gradient engineering. This is a ...
    • Mathematical and computational modeling of flexoelectricity at mesoscopic and atomistic scales 

      Codony, David (Universitat Politècnica de Catalunya, 2021-03-01)
      Tesi
      Accés obert
      This PhD thesis focuses on the development of mathematical and computational models for flexoelectricity, a relatively new electromechanical coupling that is present in any dielectric at the micron and sub-micron scales. ...
    • Modeling of electromechanical transduction at finite deformation 

      Dave, Nikhil (Universitat Politècnica de Catalunya, 2018-07-05)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
    • Multiscale modeling of surface effects in small-scale electromechanics 

      Dingle Palmer, Monica (Universitat Politècnica de Catalunya, 2020-09-29)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
    • Numerical simulation of flexoelectric cantilever actuators 

      Baqués Gallego, Laia (Universitat Politècnica de Catalunya, 2015-06-19)
      Tesina
      Accés obert
    • Phase-field modeling of fracture in ferroelectric materials 

      Abdollahi Hosnijeh, Amir (Universitat Politècnica de Catalunya, 2012-10-18)
      Tesi
      Accés obert
      The unique electro-mechanical coupling properties of ferroelectrics make them ideal materials for use in micro-devices as sensors, actuators and transducers. Nevertheless, because of the intrinsic brittleness of ferroelectrics, ...
    • Robust numerical solution of charge transport in flexophotovoltaic-based devices 

      Pérez Escudero, Sergi (Universitat Politècnica de Catalunya, 2021-07)
      Projecte Final de Màster Oficial
      Accés obert
      In this thesis, a robust computational framework for flexophotovoltaic-based devices has been developed. First, a model for describing the flexophotovoltaic effect in flexoelectric, non-piezoelectric materials is stated. ...
    • Space-time bayesian hierarchical model for paleoclimate reconstruction 

      Gual Navarro, Francisco Javier (Universitat Politècnica de Catalunya, 2022-10-18)
      Projecte Final de Màster Oficial
      Accés obert
      L'objectiu principal és reconstruir dades paleoclimàtiques per entendre l'evolució del clima. Això s'està fent utilitzant predictors espacials i temporals, com ara dades proxy i models bayesians per revelar les estadístiques ...
    • Theoretical and computational modeling of charge transport in flexo-photovoltaics 

      De La Torre Israel, Sergi (Universitat Politècnica de Catalunya, 2020-10)
      Projecte Final de Màster Oficial
      Accés obert
      In this thesis, a model to describe the flexophotovoltaic effect is formulated by coupling the flexoelectricity equations with the drift-diffusion current equations. The resulting system of non-linear PDEs is numerically ...
    • Towards a two dimensional model of surface piezoelectricity 

      Monge Villora, Oscar (Universitat Politècnica de Catalunya, 2016-06-29)
      Treball Final de Grau
      Accés obert
      We want to understand the behaviour of flexoelectricity and surface piezoelectricity and distinguish them in order to go deep into the controversies of the filed. This motivate the construction of a model of continuum ...
    • The variational approach to brittle fracture in materials with anisotropic surface energy and in thin sheets 

      Li, Bin (Universitat Politècnica de Catalunya, 2016-03-08)
      Tesi
      Accés obert
      Fracture mechanics of brittle materials has focused on bulk materials with isotropic surface energy. In this situation different physical principles for crack path selection are very similar or even equivalent. The situation ...