Now showing items 1-20 of 22

    • Acoustic evaluation of modular greenery noise barriers 

      Lacasta Palacio, Ana María; Peñaranda Ayllón, Angelina; Rodríguez Cantalapiedra, Inma; Auguet Sangrá, Carlota E.; Bures, S.; Urrestarazu, M. (2016-12-01)
      Article
      Open Access
      Green noise barriers have become an alternative means of reducing urban traffic noise. In this paper, the acoustic performance of a modular greenery noise barrier is evaluated. In situ measurements of noise reflection were ...
    • Archaeomagnetic study of a limekiln in the Les Ferreres Roman aqueduct, World Heritage Site of Tarraco 

      Casas, Lluís; Auguet Sangrá, Carlota E.; Guasch Ferré, Núria; Gómez Paccard, Miriam; Pitarch Martí, África; Prada Pérez, José Luís; Sanjurjo-Sánchez, Jorge; Menchón Bes, Joan; Badia Cortada, Marta; Díaz García, Moisés (2020-08-16)
      Article
      Restricted access - publisher's policy
      The aqueduct of Les Ferreres is a major element of the Archaeological Ensemble of Tarraco. Although the ashlars of the aqueduct are stacked without mortar, lime was used in some parts and lime was certainly used in later ...
    • Behavior of NiTi wires for dampers and actuators in extreme conditions 

      Isalgué Buxeda, Antonio; Auguet Sangrá, Carlota E.; Grau, R.; Torra Ferré, Vicenç; Cinca i Luis, Núria; Fernández, J. (2015-09-01)
      Article
      Open Access
      Shape memory alloys are considered smart materials because of their singular thermo-mechanical properties, due to a thermoelastic martensitic transformation, enabling possible uses as actuators (because of mechanical ...
    • Effects of strain aging in NiTi SMA wires for dampers 

      Auguet Sangrá, Carlota E.; Isalgué Buxeda, Antonio; Torra, Vicenç; Carreras, Guillem; Lovey, Francisco Carlos (Universidad del Pais Vasco, 2014)
      Conference report
      Open Access
      SMA NiTi wires experience evolution under constrained aging. A strain and temperature aging sequence is designed and experimented, to ascertain the functionality of the dampers exposed to weathering
    • External temperature effects on the hysteresis of NiTi wires in dampers for stay-cables 

      Torra Ferré, Vicenç; Carreras, Guillem; Casciati, Sara; Auguet Sangrá, Carlota E. (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
      Conference report
      Open Access
      The use of NiTi wires, one of the Shape Memory Alloy (SMA) materials that permits efficient damping in stayed cables for bridges, requires an appropriate behavior when exposed to the external temperature effects. The ...
    • Functional fatigue recovery of superelastic cycled NiTi wires based on near 100ºC aging treatments 

      Isalgué Buxeda, Antonio; Soul, Hugo; Yawny, Alejandro; Auguet Sangrá, Carlota E. (2015)
      Conference report
      Open Access
      Functional fatigue affecting superelastic behaviour of NiTi wires includes an accumulation of residual strain and an uneven decrement of transformation stress on cycling. Although this evolution is observed to ...
    • Improving dating of three sites from Catalonia (NE Spain) via Archaeomagnetism 

      Casas, Lluis; Auguet Sangrá, Carlota E.; Cantoni, Gerard; López Vilar, Jordi; Guasch Ferré, Núria; Prevosti, Marta (2017-12-06)
      Article
      Open Access
      Archaeomagnetic dating for four archaeological structures has been attempted in Catalonia (NE Spain) using magnetic inclination and declination values from three reference curves: the Iberian SVC and two curves computed ...
    • Microstructural effects of strain aging on NiTi pseudoelastic wires by synchrotron X-ray micro-diffraction 

      Isalgué Buxeda, Antonio; Auguet Sangrá, Carlota E.; Concustell, Amadeu; Cinca i Luis, Núria (2015)
      Conference lecture
      Open Access
      In this work, we explore the consequences of strain aging NiTi wires (2.46 mm diameter) at moderate temperatures (100ºC). The changes of the stress-strain behaviour on aged, as compared with non-aged wires, with comparatively ...
    • Microstructutal effects of strain aging on NiTi pseudoelastic wires by synchrotron X-ray micro-diffraction 

      Isalgué Buxeda, Antonio; Auguet Sangrá, Carlota E.; Concustell, Amadeu; Cinca i Luis, Núria (EDP Sciences, 2015-12)
      Part of book or chapter of book
      Open Access
      Strain aging of NiTi wires and its structural consequences are studied by Synchrotron X-ray micro-diffraction
    • Modeling of spatiotemporal patterns in bacterias colonies 

      Lacasta Palacio, Ana María; Rodríguez Cantalapiedra, Inma; Auguet Sangrá, Carlota E.; Peñaranda Ayllón, Angelina; Ramírez de la Piscina Millán, Laureano (American Physical Society, 1999-06-30)
      Article
      Open Access
      A diffusion-reaction model for the growth of bacterial colonies is presented. The often observed cooperative behavior developed by bacteria which increases their motility in adverse growth conditions is here introduced as ...
    • Ordering kinetics evaluation of FeAl powders 

      Cinca i Luis, Núria; Isalgué Buxeda, Antonio; Auguet Sangrá, Carlota E.; Concustell, Amadeu; Cano, I. G.; Guilemany Casadamon, Josep Maria; Fauth, F. (2017-12-01)
      Article
      Open Access
      In this study, time resolved X-ray diffraction experiments using synchrotron X-ray radiation have been performed to get insight on the time and temperature dependent atomic ordering of an intermetallic Fe-40Al (at.%) ...
    • Pre-stressed NiTi: effects of the thermodynamic forces and time 

      Torra Ferré, Vicenç; Isalgué Buxeda, Antonio; Auguet Sangrá, Carlota E.; Lovey, Francisco Carlos; Pelegrina, J.L.; Terriault, P. (2008-11-30)
      Conference lecture
      Restricted access - publisher's policy
      The use of NiTi in damping devices for Civil Engineering requires stable behavior of the stress-strain curves with time and cycling. In particular, the use of pre-stressed samples improves the damping efficiency. Since ...
    • Problemas de fundamentos de mecánica 

      Agea Tomás, José; Auguet Sangrá, Carlota E.; Camí Babra, Enric; Castellví Gironès, Pedro Juan; Garrido, Víctor; Lacasta Palacio, Ana María; Peñaranda Ayllón, Angelina; Ramírez de la Piscina Millán, Laureano (Universitat Politècnica de Catalunya, 2009)
      Problem statement, exercise
      Open Access
    • SMA (cu-based, niti) for use in damping: the implications of reliability for long time applications and aging behavior 

      Isalgué Buxeda, Antonio; Auguet Sangrá, Carlota E.; Carreras, Guillem; Torra Ferré, Vicenç (2011)
      Conference report
      Open Access
    • SMA (NiTi): the coupling between time, temperature and cycling frequency 

      Torra, Vicenç; Auguet Sangrá, Carlota E.; Isalgué Buxeda, Antonio; Carreras, Guillem; Lovey, Francisco Carlos (2013-06-01)
      Article
      Restricted access - publisher's policy
      The main interest focuses in the necessary tools for accurate simulation of the damper behavior in their application. It’s essential a well determined knowledge of the dissipated energy and of the hysteresis cycle shape ...
    • SMA in mitigation of extreme loads in civil engineering: damping actions in stayed cables 

      Torra Ferré, Vicenç; Isalgué Buxeda, Antonio; Auguet Sangrá, Carlota E.; Carreras, Guillem; Lovey, Francisco Carlos; Terriault, Patrick; Dieng, Lamine (Trans Tech Publications, 2011-10-27)
      Article
      Open Access
      Guaranteeing the use of Shape Memory Alloys (SMA) in mitigation of extreme load effects requires a deep study of the SMA behavior according to the specific requirements of the application. In particular, for a storm is ...
    • SMA in mitigation of extreme loads in civil engineering: study of their application in a realistic steel portico 

      Torra Ferré, Vicenç; Isalgué Buxeda, Antonio; Auguet Sangrá, Carlota E.; Carreras, Guillem; Casciati, Fabio; Lovey, Francisco Carlos; Terrieault, Patrick (Trans Tech Publications, 2011-10)
      Article
      Open Access
      Guaranteeing the use of Shape Memory Alloys (SMA) in mitigation of extreme load effects requires a deep study of the SMA behavior according to the specific requirements of the applications in damping. The damper was defined ...
    • SMA passive elements for damping in stayed cables: experimental results and simulation 

      Torra, Vicenç; Isalgué Buxeda, Antonio; Auguet Sangrá, Carlota E.; Casciati, Fabio; Casciat, Sara; Terriault, Patrick (2012)
      Conference lecture
      Restricted access - publisher's policy
      The use of shape memory alloy (SMA) wires as passive elements for damping the vibrations of stayed cables requires that the essential conditions of SMA necessary for the application are well established. The specific ...
    • Temperatura i calor : teoria i problemes 

      Auguet Sangrá, Carlota E. (Edicions UPC, 1995)
      Book
      Restricted access to the UPC academic community
      En aquest text es presenta de forma conjunta, concisa i elemental, tant des de l'aspecte teòric com pràctic, efectes com les dilatacions que es produeixen en materials sotmesos a variacions de temperatura i les tensions o ...
    • The SMA: an effective damper in civil engineering that smoothes oscillations 

      Torra Ferré, Vicenç; Isalgué Buxeda, Antonio; Auguet Sangrá, Carlota E.; Carreras, Guillem (Universitat Politècnica de Catalunya. Escola Tècnica Superior d'Enginyers de Camins Canals i Ports de Barcelona, 2011-11-16)
      Conference lecture
      Open Access
      The properties of SMA (Shape Memory Alloys, that are smart materials) are associated to a first order phase transition named martensitic transformation that occurs between metastable phases: austenite and martensite. At ...