Now showing items 1-20 of 20

  • 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 ...
  • 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 Casademont, 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 ...
  • 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 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 (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 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; Auguet Sangrá, Carlota E.; Carreras, Guillem; Dieng, Lamine; Lovey, F.C.; Terriault, P. (2012)
    Article
    Restricted access - publisher's policy
    The properties of SMA (Shape Memory Alloys, smart materials) are associated to a first order phase transition named martensitic transformation that occurs between metastable phases: austenite and martensite. At higher ...
  • 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 ...
  • Using archaeomagnetism to improve the dating of three sites in Catalonia (NE Spain) 

    Casas, Lluís; Auguet Sangrá, Carlota E.; Cantoni, Gerard; López Vilar, Jordi; Guasch Ferré, Núria; Prevosti Monclús, Marta (2018)
    Article
    Open Access
    Archaeomagnetic dating was performed on four archaeological structures in Catalonia (NE Spain) using magnetic inclination and declination values from three reference curves: the Iberian SVC and two curves computed using ...