Search results for "electric stress"

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Performance of two innovative stress sensors imbedded in mortar joints of new masonry elements

2021

Abstract Many historical cities enjoy the presence of masonry buildings with inestimable historical, artistic and cultural value. Old masonry buildings often suffer structural deficiencies, design faults and materials aging process. In recent years, many researchers focused their attention on the opportunities that structural health monitoring (SHM) can ensure for the health state of existing masonry structures, where damage can be difficult to be promptly predicted, pontentially causing abrupt collapses, with high risks for the community. This paper presents an experimental study on the effectiveness of two types of stress sensor for SHM of new masonry elements. Ceramic piezoelectric senso…

EngineeringPiezoelectric sensorCapacitive stress sensorCapacitive sensing0211 other engineering and technologiesUniaxial compressionExperimental testing020101 civil engineering02 engineering and technology0201 civil engineering021105 building & constructionGeneral Materials ScienceCapacitive stress sensorsCivil and Structural EngineeringMasonry wallStructural health monitoringStress sensorbusiness.industryStress sensorsMasonry wallsBuilding and ConstructionStructural engineeringCapacitive stress sensors Experimental testing Masonry walls Piezoelectric stress sensors Structural health monitoringMasonryCapacitive stress sensors; Experimental testing; Masonry walls; Piezoelectric stress sensors; Structural health monitoringSettore ICAR/09 - Tecnica Delle CostruzioniPiezoelectric stress sensorsPiezoelectric stress sensorStructural health monitoringMortarbusiness
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Improvement of DSSC performance by voltage stress application

2016

Dye-sensitized solar cells (DSSCs) are promising third generation photovoltaic devices given their potential low cost and high efficiency. Some factors still affect DSSCs performance, such structure of electrodes, electrolyte compositions, nature of the sensitizers, power conversion efficiency, long-term stability, etc. In this work we discuss the effect of electrical stresses, which allow to improve DSSC performance. We have investigated the outcomes of forward and reverse DC bias stress as a function of time, voltage, and illumination level in the DSSCs sensitized with the N719, Ruthenium complex based dye. We demonstrate that all the major solar cell parameters, i.e., open circuit voltag…

Materials scienceageing effectContext (language use)02 engineering and technology010402 general chemistryDye-sensitized solar cells01 natural sciencesageing effectslaw.inventionlawSolar cellelectric stressEquivalent series resistanceOpen-circuit voltagebusiness.industryPhotovoltaic systemEnergy conversion efficiency021001 nanoscience & nanotechnologyelectric streperformance improvement0104 chemical sciencesDye-sensitized solar cellOptoelectronics0210 nano-technologybusinessDye-sensitized solar cellShort circuit
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