Exploració per tema "Porosity"

Ara es mostren els items 1-20 de 53

    • 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
      Accés obert
      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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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 new approach to model geomaterials with heterogeneous properties in thermo-hydro-mechanical coupled problems 

      Rodríguez Dono, Alfonso; Zhou, Yunfeng; Olivella Pastallé, Sebastià (Elsevier, 2023-07)
      Article
      Accés obert
      The main objective of this article is to present a new approach to model coupled thermo-hydro-mechanical problems considering geomaterials with heterogeneous properties. This approach has been implemented in the software ...

    • 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 ...

    • 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)
      Text en actes de congrés
      Accés obert
      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
      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 ...

    • An a priori error analysis of poro-thermoviscoelastic problems 

      Bazarra, Noelia; Fernández, Jose R.; Quintanilla de Latorre, Ramón (Elsevier, 2020-08-15)
      Article
      Accés obert
      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 ...

    • An experimental investigation about the dimensional accuracy and the porosity of copper-filled pla fused filament fabrication parts 

      Buj Corral, Irene; Sivatte Adroer, Mauricio (Multidisciplinary Digital Publishing Institute (MDPI), 2023-09-18)
      Article
      Accés obert
      In recent years, metal-filled plastic filaments have begun to be used in fused filament fabrication (FFF) technology. However, the characterization of the parts obtained is still under development. In this work, the results ...

    • Analysis of a thermoelastic problem with the Moore–Gibson–Thompson microtemperatures 

      Bazarra, Noelia; Fernández García, José Ramón; Liverani, Lorenzo; Quintanilla de Latorre, Ramón (Elsevier, 2024-03)
      Article
      Accés obert
      In this paper, we study, from both an analytical and a numerical point of view, a poro-thermoelastic problem with microtemperatures. The so-called Moore–Gibson–Thompson equation is used to model the contribution for the ...

    • 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
      Accés restringit per política de l'editorial
      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)
      Capítol de llibre
      Accés restringit per política de l'editorial
      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
      Accés obert
      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 for strain gradient porous elastic waves 

      Baldonedo, Jacobo; Fernández, José Ramón; Magaña Nieto, Antonio; Quintanilla de Latorre, Ramón (2023-02)
      Article
      Accés obert
      We study the one-dimensional problem for the linear strain gradient porous elasticity. Our aim is to analyze the behavior of the solutions with respect to the time variable when a dissipative structural mechanism is ...

    • 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
      Accés obert
      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)
      Tesi
      Accés obert
      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
      Accés obert
      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
      Accés obert
      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)
      Treball Final de Grau
      Accés obert
      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
      Accés restringit per política de l'editorial
      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)
      Projecte Final de Màster Oficial
      Accés obert
      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 ...