Now showing items 1-20 of 46

    • 3D printing of porous scaffolds with controlled porosity and pore size values 

      Buj Corral, Irene; Bagheri, Ali; Petit Rojo, Oriol (Multidisciplinary Digital Publishing Institute (MDPI), 2018-08-25)
      Article
      Open Access
      3D printed scaffolds can be used, for example, in medical applications for simulating body tissues or for manufacturing prostheses. However, it is difficult to print porous structures of specific porosity and pore size ...
    • A microstructural model on the link between change in pore size distribution and wetting induced deformation in a compacted silt 

      Casini, Francesca; Vaunat, Jean; Romero Morales, Enrique Edgar (American Society of Civil Engineers (ASCE), 2013)
      Conference report
      Restricted access - publisher's policy
      The water retention curve expressed in terms of water content or degree of saturation and suction is hysteretic, stress path dependent (on void ratio), and depends on pore network. To properly describe its evolving nature, ...
    • A poro-thermoelastic problem with dissipative heat conduction 

      Bazarra, Noelia; Fernández, Jose R.; Magaña Nieto, Antonio; Quintanilla de Latorre, Ramón (2020-07-18)
      Article
      Open Access
      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 ...
    • A porosidade no largo da batata: cultura como patrimônio imaterial na cidade contemporânea 

      Blümer, Mariana Piovan (Departament d’Urbanisme i Ordenació del Territori. Universitat Politècnica de Catalunya / Curso de Arquitetura e Urbanismo. Universidade do Vale do Itajaí, 2016-05-31)
      Conference report
      Open Access
      O Largo da Batata torna-se objeto de estudo na busca pela compreensão da Porosidade na cidade como condicionante de ocupação e uso dos espaços públicos pelo ser humano, assim como estepróprio se construindo a partir de ...
    • 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
      Open Access
      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 ...
    • An a priori error analysis of poro-thermoviscoelastic problems 

      Bazarra, Noelia; Fernández, Jose R.; Quintanilla de Latorre, Ramón (Elsevier, 2020-08-15)
      Article
      Open Access
      In this paper, we study, from the numerical point of view, a dynamic one-dimensional problem arising in thermoelasticity and thermoviscoelasticity of types II and III. Porosity is also included into the models. The generic ...
    • Analysis of the conductance transient in thick film tin oxide gas sensors 

      Vilanova, X; Llobet Valero, Eduard; Alcubilla González, Ramón; Sueiras, Jl; Correig, X (Elsevier, 1996-03)
      Article
      Restricted access - publisher's policy
      In this paper, we analyse the conductance transient of a Taguchi TGS-822 sensor under a step change in the vapour concentration. A diffusion-limited range in the conductance transient is observed. Adjustments between the ...
    • Biomedical applications of powder metallurgy 

      Rodríguez Contreras, Alejandra María; Punset Fuste, Miquel; Manero Planella, José María; CALERO, JOSE ANTONIO; Torres Garrido, Diego (Elsevier, 2021-09-01)
      Part of book or chapter of book
      Restricted access - publisher's policy
      The performance and properties of Titanium (Ti) and its alloys can be fully exploited for biomedical applications such as orthopedic and dental implants, when porous structures are used. Such Ti structures can matched the ...
    • Characterization of 3d printed yttria-stabilized zirconia parts for use in prostheses 

      Buj Corral, Irene; VIDAL, DANIEL; Tejo Otero, Aitor; Padilla, Jose Antonio; Xuriguera, Elena; Fenollosa i Artés, Felip (2021-11-03)
      Article
      Open Access
      The main aim of the present paper is to study and analyze surface roughness, shrinkage, porosity, and mechanical strength of dense yttria-stabilized zirconia (YSZ) samples obtained by means of the extrusion printing ...
    • Decay of waves in strain gradient porous elasticity with Moore-Gibson-Thompson dissipation 

      Fernández García, José Ramon; Magaña Nieto, Antonio; Quintanilla de Latorre, Ramón (2022-09-05)
      Article
      Open Access
      We study a one-dimensional problem arising in strain gradient porous-elasticity. Three different Moore–Gibson–Thompson dissipation mechanisms are considered: viscosity and hyperviscosity on the displacements, and weak ...
    • Development of the in situ forming of a liquid infused preform (ISFLIP) process : a new manufacturing technique for high performance fibre reinforced polymer (FRP) components 

      Juan Muñoz, Jaime (Universitat Politècnica de Catalunya, 2017-07-20)
      Doctoral thesis
      Open Access
      A problem is not a problem anymore if no solution exists; therefore, in the present dissertation, a novel manufacturing technique, the In Situ Forming of a Liquid Infused Preform (ISFLIP), is proposed as a solution to some ...
    • Effect of printing parameters on dimensional error, surface roughness and porosity of FFF printed parts with grid structure 

      Buj Corral, Irene; Bagheri, Ali; Sivatte Adroer, Mauricio (Multidisciplinary Digital Publishing Institute (MDPI), 2021-04-09)
      Article
      Open Access
      Extrusion printing processes allow for manufacturing complex shapes in a relatively cheap way with low-cost machines. The present study analyzes the effect of printing parameters on dimensional error, roughness, and porosity ...
    • Efficiency of magnesium hydroxide as engineering seal in the geological sequestration of CO2 

      Dávila Ordóñez, Maria Gabriela; Cama Robert, Jordi; Galí i Medina, Salvador; Luquot, Linda; Soler Matamala, Josep M. (John Gale, 2016-05)
      Article
      Open Access
      Injection of CO2 at depth will cause the acidification of groundwater. As a preliminary study for the potential use of MgO as an alternative to Portland cement in injection wells, MgO carbonation has been studied by means ...
    • Estudi de la macro i micro porositat en peces d'alumini moldejades 

      Albareda Lax, Daniel (Universitat Politècnica de Catalunya, 2018-06-21)
      Bachelor thesis
      Open Access
      La porositat és un defecte que presenten tots els aliatges d’alumini. Ja que l’ús d’alumini està experimentant un gran creixement a nivell mundial,és important conèixer els efectes d’aquests defectes a les propietats del ...
    • Estudio de factibilidad y caracterización de áridos para hormigón estructural 

      Gámez García, Diana C.; Saldaña Márquez, Héctor; Gómez Soberón, José Manuel Vicente; Corral Higuera, Ramón (Universidad del Norte, 2017-07-01)
      Article
      Restricted access - publisher's policy
      El hormigón es un material fundamental en la construcción civil, arquitectónica y de edificios; sin embargo, su producción convencional no corresponde a un desarrollo sostenible. En la actualidad, el prescindir de su uso ...
    • Estudio del efecto de la modificación con estroncio en la microestructura y las propiedades mecánicas de aleaciones Al-Si-Mg 

      Moreno Fina, Albert (Universitat Politècnica de Catalunya, 2020-07-14)
      Master thesis
      Open Access
      Un dels principals defectes que apareixen en els aliatges d'alumini obtinguts per fosa són els causats per la porositat. En aquest treball s’ha analitzat un aliatge Al-Si-Mg utilitzat per la fabricació de connectors d'alta ...
    • Fluid flow simulation and permeability computation in deformed porous carbonate grainstones 

      Zambrano, Miller; Tondi, Emanuele; Mancini, Lucia; Lanzafame, Gabriele; Trias Miquel, Francesc Xavier; Arzilli, Fabio; Materazzi, Fabio; Torrieri, Stefano (Elsevier, 2018-05-01)
      Article
      Open Access
      In deformed porous carbonates, the architecture of the pore network may be modified by deformation or diagenetic processes altering the permeability with respect to the pristine rock. The effects of the pore texture and ...
    • Fractionation and removal of dissolved organic carbon in a full-scale granular activated carbon filter used for drinking water production 

      Gibert Agulló, Oriol; Lefèvre, B.; Fernández, Marc; Bernat Camí, Xavier; Paraira, Miquel; Pons, Marc (2013-03-15)
      Article
      Restricted access - publisher's policy
      The removal of natural organic matter (NOM) and, more particularly, its individual fractions by two different GACs was investigated in full-scale filters in a drinking water treatment plant (DWTP). Fractionation of NOM was ...
    • Gradient based porosity calculation in casting simulation 

      Díez Rodríguez, Daniel (Universitat Politècnica de Catalunya, 2017-06-15)
      Master thesis
      Open Access
      Porosity is one of the most common defects in casting production. When some parts of the casting begin to solidify they contract due to the difference of densities between the liquid and solid phases. The areas that are ...
    • Improving selective thermal emission properties of three-dimensional macroporous silicon through porosity tuning 

      Garin Escriva, Moises; Todorov Trifonov, Trifon; Rodríguez Martínez, Ángel; Alcubilla González, Ramón; Marquier, F.; Arnold, C.; Greffet, J.-J. (American Institute of Physics, 2008-08-27)
      Article
      Restricted access - publisher's policy
      We present a theoretical and experimental study on the effect of progressive porosity increase, through multiple oxidation/oxide removal steps, upon the optical characteristics in threedimensional macroporous silicon. ...