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Ara es mostren els items 77-96 de 131

    • Low temperature magnetization and resistivity measurements in Co based soft magnetic microwires 

      Tejada, J; Llumà Fuentes, Jordi; Vazquez, M; Hernàndez, J M; Ruiz, J M; Garcia-Benitez, J M; Zhukov, A; Castaño, F J; Zhang, X X (1999-05)
      Article
      Accés obert
      Magnetization and resistivity measurements, embracing a temperature range 2-300 K, have been performed in glass-coated Co6sMnTSiloBls amorphous microwires. The relation between both types of measurements is analysed. Similar ...

    • Magnetic susceptibility of sodium rare-rarth fluorites Na[sub 0.5 -- x]R[sub 0.5 + x]F[sub 2 + 2x] (R [equals sign] Dy, Ho, Er, Tm, Yb) and some ordered phases 

      Bohigas Janoher, Xavier; Llumà Fuentes, Jordi; Tejada, J.; Krivandina, E.A.; Sobolev, B.P. (2001-05)
      Article
      Accés restringit per política de l'editorial
      —Magnetic properties of the nonstoichiometric phases with the fluorite-type “defect” structure Na 0.4 R 0.6 F 2.2 ( R = Ho, Er, Tm, Yb) and Na 0.35 Dy 0.65 F 2.3 have been studied as well as some ordered ...

    • Measurement of elastic constants on nanostructured iron and copper 

      Roca Vallmajor, Antoni; Llumà Fuentes, Jordi; Jorba Peiró, Jordi; Llorca Isern, Núria (Trans Tech Publications, 2010)
      Text en actes de congrés
      Accés restringit per decisió de l'autor

    • Mechanical behavior of blood vessels: elastic and viscoelastic contributions 

      Sánchez Molina, David; García Vilana, Silvia; Llumà Fuentes, Jordi; Galtés Vicente, Ignasi; Velázquez Ameijide, Juan; Rebollo-Soria, M. Carmen; Arregui Dalmases, Carlos (2021-08-26)
      Article
      Accés obert
      The mechanical properties of the cerebral bridging veins (CBVs) were studied using advanced microtensile equipment. Detailed high-quality curves were obtained at different strain rates, showing a clearly nonlinear stress–strain ...

    • Mechanical characterization of thermoplastic elastomers based on olefin processed through material extrusion 

      Adrover Monserrat, Bàrbara; Llumà Fuentes, Jordi; Jerez Mesa, Ramón; Travieso Rodríguez, José Antonio (Springer Nature, 2023-05-12)
      Article
      Accés obert
      Thermoplastic elastomeric materials are processable through 3D printing. These materials demonstrate excellent mechanical properties, along with good flexibility. A better understanding of the creation of bonds between the ...

    • Mechanical properties of 3D-printing polylactic acid parts subjected to bending stress and fatigue testing 

      Travieso Rodríguez, José Antonio; Jerez Mesa, Ramón; Llumà Fuentes, Jordi; Traver Ramos, Oriol; Gómez Gras, Giovanni; Roa Rovira, Joan Josep (Multidisciplinary Digital Publishing Institute (MDPI), 2019-11-22)
      Article
      Accés obert
      This paper aims to analyse the mechanical properties response of polylactic acid (PLA) parts manufactured through fused filament fabrication. The influence of six manufacturing factors (layer height, filament width, fill ...

    • Mechanical property characterization and simulation of fused deposition modeling Polycarbonate parts 

      Domingo Espín, Miquel; Puigoriol Forcada, Josep M.; García Granada, Andrés Amador; Llumà Fuentes, Jordi; Borrós Gómez, Salvador; Reyes Pozo, Guillermo (2015-10-15)
      Article
      Accés restringit per política de l'editorial
      Building end-use functional parts with additive manufacturing (AM) technologies is a challenging task. Several factors influence their surface finish, dimensional accuracy, mechanical properties and cost. Their orientation ...

    • Mechanical strengthening in S235JR steel sheets through vibration-assisted ball burnishing 

      Llumà Fuentes, Jordi; Gómez Gras, Giovanni; Jerez Mesa, Ramón; Rue Mascarell, Jaume; Travieso Rodríguez, José Antonio (Multidisciplinary Digital Publishing Institute (MDPI), 2020-07-28)
      Article
      Accés obert
      The superficial effect of hardening caused after vibration-assisted ball burnishing and its consequences in the tensile behavior of a carbon steel material are studied in this paper. As ball burnishing affects the material ...

    • Modelo para predecir el tiempo de pulido de las superfícies de moldes 

      González Rojas, Hernán Alberto; Travieso Rodríguez, José Antonio; Jorba Peiró, Jordi; Llumà Fuentes, Jordi (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial

    • Monitoring of processing conditions of an ultrasonic vibration-assisted ball-burnishing process 

      Estévez Urra, Aida; Llumà Fuentes, Jordi; Jerez Mesa, Ramón; Travieso Rodríguez, José Antonio (Multidisciplinary Digital Publishing Institute (MDPI), 2020-04-30)
      Article
      Accés obert
      Although numerous references present the beneficial effects on surface integrity of ultrasonic vibration-assisted ball burnishing (UVABB), nothing has been reported about the dynamic behavior of the UVABB tool, workpiece, ...

    • Multi Jet Fusion PA12 manufacturing parameters for watertightness, strength and tolerances 

      Morales Planas, Sergio; Minguella Canela, Joaquim; Llumà Fuentes, Jordi; Travieso Rodríguez, José Antonio; García Granada, Andrés-Amador (Multidisciplinary Digital Publishing Institute (MDPI), 2018-08-18)
      Article
      Accés obert
      The aim of this paper is to explore the watertightness behaviour for high pressure applications using Multi Jet Fusion technology and polyamide 12 as a material. We report an efficient solution for manufacturing functional ...

    • Multiphysics simulation of metal sheet electromagnetic forming 

      Fruitós Bickham, Óscar Alejandro; Otin, Ruben; Méndez, Roger; Llumà Fuentes, Jordi (2009)
      Text en actes de congrés
      Accés obert
      Electromagnetic Forming (EMF) is a deformation process at high speed that couples electromagnetic, mechanical and thermal problems. Due to the complexity of these couplings, the simulation of the process via finite elements ...

    • Optimization of nanocrystalline aluminium production using an objective function 

      Solà Saracibar, Joan; Llumà Fuentes, Jordi; Jorba Peiró, Jordi (2010)
      Text en actes de congrés
      Accés obert

    • Pequeños proyectos de ingeniería como enseñanza no presencial 

      Llumà Fuentes, Jordi; Manzanares Brotons, Manuel; Rodriguez, Julian; Bordoy, Albert (Oficina de Serveis Editorials i Multimèdia del Servei de Comunicació Institucional de la UPC, 2004)
      Text en actes de congrés
      Accés obert
      La introducción de la enseñanza no presencial abre la posibilidad a nuevas formas de aprendizaje no dirigido. En el presente trabajo se presentan los resultados de plantear un pequeño proyecto de ingeniería (el diseño de ...

    • Prediction of mechanical properties of human rib cortical bone using fractal dimension 

      Velázquez Ameijide, Juan; García Vilana, Silvia; Sánchez Molina, David; Llumà Fuentes, Jordi; Martínez González, Eva; Rebollo-Soria, M. Carmen; Arregui Dalmases, Carlos (Gordon and Breach Science Publishers, 2020-10-26)
      Article
      Accés obert
      A large number of post mortem human subjects was used to investigate the relation between the micro-structure of rib cortical bone and the mechanical properties using Fractal Dimension. Uniaxial tensile tests were performed ...

    • Predictive model for polishing times in mould finishing 

      González Rojas, Hernán Alberto; Travieso Rodríguez, José Antonio; Llumà Fuentes, Jordi; Jorba Peiró, Jordi; Sánchez Egea, Antonio J. (EUETIB, 2013-12)
      Comunicació de congrés
      Accés obert
      El pulido, proceso final utilizado en la producción de piezas, es a menudo lento y se aplica manualmente. Normalmente define la rugosidad superficial y la precisión de la pieza. Se lleva a cabo utilizando partículas duras ...

    • Relation between mechanical and densimetric properties to fractal dimension in human rib cortical bone 

      García Vilana, Silvia; Sánchez Molina, David; Velázquez Ameijide, Juan; Llumà Fuentes, Jordi; Arregui Dalmases, Carlos (2023-07)
      Article
      Accés restringit per política de l'editorial
      Numerous prior studies hypothesized a power-law relationship () between cortical bone Young's modulus (E) and density (¿) with an exponent , that has not been previously justified in the literature on a theoretical level. ...

    • Sostenibilitat en el transport- optimització del consum de combustible 

      Llumà Fuentes, Jordi; Manzanares Brotons, Manuel (Centre per a la sostenibilitat de la UPC, 2007)
      Text en actes de congrés
      Accés obert
      La reducció del dispendi d’energia d’un vehicle es pot minimitzar mitjançant un ús adequat del sistema propulsor. El mètode desenvolupat implica l’elaboració d’un model numèric del vehicle i una descripció matemàtica de ...

    • Sostenibilitat en el transport: optimització del consum de combustible 

      Llumà Fuentes, Jordi; Manzanares Brotons, Manuel (Centre per a la Sostenibilitat, 2007-07-12)
      Text en actes de congrés / Comunicació de congrés
      Accés obert
      La reducció del dispendi d’energia d’un vehicle es pot minimitzar mitjançant un ús adequat del sistema propulsor. El mètode desenvolupat implica l’elaboració d’un model numèric del vehicle i una descripció matemàtica de ...

    • Spectral analysis of forces during a ball-burnishing process assisted by vibrations 

      Gómez Gras, Giovanni; Travieso Rodríguez, José Antonio; Llumà Fuentes, Jordi; Jerez Mesa, Ramón (Destech, 2015)
      Text en actes de congrés
      Accés obert
      One of the most recent innovations in manufacturing engineering has been the assistance of machining, finishing and superfinishing processes with vibrations as a means of improving the mechanical properties of the workpieces. ...