Ara es mostren els items 1-20 de 32

    • A poro-thermoelastic problem with dissipative heat conduction 

      Bazarra, Noelia; Fernández, Jose R.; Magaña Nieto, Antonio; Quintanilla de Latorre, Ramón (2020-07-18)
      Article
      Accés obert
      In this work, we study from the mathematical and numerical points of view a poro-thermoelastic problem. A long-term memory is assumed on the heat equation. Under some assumptions on the constitutive tensors, the resulting ...
    • An a priori error analysis of a Lord–Shulman poro-thermoelastic problem with microtemperatures 

      Baldonado, Jacobo; Bazarra, Noelia; Fernández, Jose R.; Quintanilla de Latorre, Ramón (2020-10)
      Article
      Accés obert
      In this paper, we deal with the numerical analysis of the Lord–Shulman thermoelastic problem with porosity and microtemperatures. The thermomechanical problem leads to a coupled system composed of linear hyperbolic partial ...
    • An a priori error analysis of a porous strain gradient model 

      Baldonedo, Jacobo; Fernández, José Ramón; Magaña Nieto, Antonio; Quintanilla de Latorre, Ramón (Wiley-VCH, 2022-01)
      Article
      Accés obert
      In this work, we consider, from the numerical point of view, a boundary-initial value problem for non-simple porous elastic materials. The mechanical problem is written as a coupled hyperbolic linear system in terms of ...
    • Analysis of a thermoelastic problem of type III 

      Bazarra, Noelia; Fernández, Jose R.; Quintanilla de Latorre, Ramón (2020-06)
      Article
      Accés obert
      This paper investigates several aspects of the linear type III thermoelastic theory. First, we consider the most general system of equations for this theory in the case that the conductivity rate is not definite and we ...
    • Continuous-discontinuous models of failure based on non-local displacements 

      Tamayo Mas, Elena (Universitat Politècnica de Catalunya, 2009-01)
      Projecte Final de Màster Oficial
      Accés obert
      In this work, a new continuous-discontinuous approach is presented. This new technique is based on a non-local model (such as continuum damage or plasticity) based on non- local displacements. On the one hand, this work ...
    • Decay of solutions for a mixture of thermoelastic one dimensional solids 

      Muñoz Rivera, Jaime E.; Naso, Maria-Grazia; Quintanilla de Latorre, Ramón (2013-08-01)
      Article
      Accés restringit per política de l'editorial
      We study a PDE system modeling thermomechanical deformations for a mixture of thermoelastic solids. In particular we investigate the asymptotic behavior of the solutions. First, we identify conditions on the constitutive ...
    • Decay of solutions for a mixture of thermoelastic solids with different temperatures 

      Muñoz Rivera, Jaime E.; Naso, Maria Grazia; Quintanilla de Latorre, Ramón (2016-02-06)
      Article
      Accés obert
      We study a system modeling thermomechanical deformations for mixtures of thermoelastic solids with two different temperatures, that is, when each component of the mixture has its own temperature. In particular, we investigate ...
    • Decay of solutions for strain gradient mixtures 

      Magaña Nieto, Antonio; Magaña Centelles, Marc; Quintanilla de Latorre, Ramón (Wiley-VCH, 2023-02)
      Article
      Accés obert
      We study antiplane shear deformations for isotropic and homogeneous strain gradient mixtures of the Kelvin-Voigt type in a cylinder. Our aim is to analyze the behaviour of the solutions with respect to the time variable ...
    • Enhancing topology optimisation of elastic structures via mesh adaptation 

      Araya Matilla, Daniel Rolando (Universitat Politècnica de Catalunya, 2023-01)
      Projecte Final de Màster Oficial
      Accés obert
      Topology optimization aims to find the best layout of material within a design domain to obtain the best performance, according to specific criteria. In many applications, the objective functional depends on the solution ...
    • Exponential decay in nonsimple thermoelasticity of type III 

      Magaña Nieto, Antonio; Quintanilla de Latorre, Ramón (2016-01-15)
      Article
      Accés obert
      This paper deals with the model proposed for nonsimple materials with heat conduction of type III.We analyze rst the general system of equations, determine the behavior of its solutions with respect to the time and show ...
    • Exponential decay of solutions in type II porous-thermo-elasticity with quasi-static microvoids 

      Magaña Nieto, Antonio; Miranville, Alain; Quintanilla de Latorre, Ramón (2020-12-15)
      Article
      Accés obert
      In this note we study the problem proposed by the one-dimensional thermo-porous-elasticity of type II with quasi-static microvoids or, in mathematical terms, when the second time derivative of the volume fraction is so ...
    • Foreword to special issue on ‘‘Qualitative Methods in Engineering Science’’ 

      Quintanilla de Latorre, Ramón; Fu, Yibin (2015-03-01)
      Article
      Accés restringit per política de l'editorial
    • Lord–Shulman thermoelasticity with microtemperatures 

      Bazarra, Noelia; Fernández, José Ramón; Quintanilla de Latorre, Ramón (2021-10)
      Article
      Accés obert
      In this paper we consider the Lord–Shulman thermoelastic theory with porosity and microtemperatures. The new aspect we propose here is to introduce a relaxation param- eter in the microtemperatures. Then we obtain an ...
    • Lower bounds of end effects for a nonhomogeneous isotropic linear elastic solid in anti-plane shear 

      Leseduarte Milán, María Carme; Quintanilla de Latorre, Ramón (2015-02-01)
      Article
      Accés obert
      In this paper we give lower bounds for the spatial decay of the solutions for anti-plane shear deformations in the case of isotropic inhomogeneous elastic materials. We first consider the case when the shear modulus only ...
    • Mathematical modeling and simulation of active matter and biological materials 

      Blanco Dorca, Pau (Universitat Politècnica de Catalunya, 2021-07)
      Projecte Final de Màster Oficial
      Accés obert
      In this thesis, we will study the invasion of breast cancer into the tissue. This process involves many cellular and extracellular processes tightly coupled between them. In particular, in this work we focus on the mechanics ...
    • Miniature switchable millimeter-wave BiCMOS low-noise amplifier at 120/140 GHz using an HBT switch 

      Heredia, F.-Javier (Francisco Javier); Ribó Pal, Miquel; Pradell i Cara, Lluís; Wipf, Selin Tolunay; Göritz, Alexander; Wietstruck, Matthias; Wipf, Christian; Kaynak, Mehmet (2019-10-01)
      Article
      Accés obert
      A 120–140 GHz frequency-switchable, very compact low-noise amplifier (LNA) fabricated in a 0.13 µm SiGe:C BiCMOS technology is proposed. A single radio-frequency (RF) switch composed of three parallel hetero junction bipolar ...
    • Modelling and optimization of THz photoconductive antennas 

      Mas Mendoza, Sergi (Universitat Politècnica de Catalunya, 2021-07-16)
      Treball Final de Grau
      Accés obert
      En aquest treball, tenim com a objectiu estudiar els processos d’emissió i detecció de THz que es produeixen als substrats fotoconductors. Aquests estan alimentats òpticament per polsos làsers ultracurts o per senyals làser ...
    • Moore–Gibson–Thompson thermoelasticity 

      Quintanilla de Latorre, Ramón (2019-07-21)
      Article
      Accés obert
      We consider a thermoelastic theory where the heat conduction is escribed by the Moore–Gibson–Thompson equation. In fact, this equation can be obtained after the introduction of a relaxation parameter in the Green–Naghdi ...
    • On (non-)exponential decay in generalized thermoelasticity with two temperatures 

      Leseduarte Milán, María Carme; Quintanilla de Latorre, Ramón; Racke, Reinhard (2016-11)
      Report de recerca
      Accés obert
      We study solutions for the one-dimensional problem of the Green-Lindsay and the Lord-Shulman theories with two temperatures. First, existence and uniqueness of weakly regular solutions are obtained. Second, we prove the ...
    • On (non-)exponential decay in generalized thermoelasticity with two temperatures 

      Leseduarte Milán, María Carme; Quintanilla de Latorre, Ramón; Racke, Reinhard (Elsevier, 2017-08)
      Article
      Accés obert
      We study solutions for the one-dimensional problem of the Green-Lindsay and the Lord-Shulman theories with two temperatures. First, existence and uniqueness of weakly regular solutions are obtained. Second, we prove the ...