Temporal evolution in a dissipative air-coupled spherical dielectric elastomer actuator
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Mechanical Science and Technology"
DOI: 10.1007/s12206-017-0832-7
Abstract: A viscoelastic model is developed for a dissipative Thin spherical dielectric elastomer actuator (TSDEA), with which the air-coupled effect and the ambient pressure effect are considered. The evolution equation is constructed by using the rheological… read more here.
Keywords: dielectric elastomer; evolution; air coupled; spherical dielectric ... See more keywords
Rapid guided wave inspection of complex stiffened composite structural components using non-contact air-coupled ultrasound
Sign Up to like & getrecommendations! Published in 2018 at "Composite Structures"
DOI: 10.1016/j.compstruct.2018.08.024
Abstract: Abstract This article demonstrates a rapid, fully non-contact inspection technique for a full-scale complex composite structural component using air-coupled ultrasonic guided waves. The presence of different features such as stiffeners, stringers and geometric variations in… read more here.
Keywords: air coupled; composite structural; guided wave; inspection ... See more keywords
Impact damage assessment in biocomposites by micro-CT and innovative air-coupled detection of laser-generated ultrasound
Sign Up to like & getrecommendations! Published in 2019 at "Composite Structures"
DOI: 10.1016/j.compstruct.2018.12.013
Abstract: Abstract The increasing use of natural fibre composites in at least semi-structural applications along with a demand for a fast and accurate damage detection for quality purpose and in-service reliability promote a need for non-contact… read more here.
Keywords: natural fibre; damage; fibre composites; air coupled ... See more keywords
The excitation and detection of Lamb waves in a droplet-loaded plate using air-coupled ultrasonic transducers
Sign Up to like & getrecommendations! Published in 2021 at "Measurement"
DOI: 10.1016/j.measurement.2020.108954
Abstract: Abstract The signals in an air-coupled ultrasonic inspection system using Lamb waves would be affected by liquid droplets on the surface of test plates. To investigate the wave behaviour, a plate-droplet inspection system comprising a… read more here.
Keywords: lamb waves; air coupled; plate; coupled ultrasonic ... See more keywords
Hybrid laser and air-coupled ultrasonic defect detection of aluminium and CFRP plates by means of Lamb mode
Sign Up to like & getrecommendations! Published in 2020 at "Results in physics"
DOI: 10.1016/j.rinp.2020.103438
Abstract: Abstract This study presents two non-contact systems – hybrid laser with air-coupled ultrasound and pure air-coupled ultrasonic system for the non-destructive inspection and detection of flaws in CFRP and aluminium plates. B-scans are used to… read more here.
Keywords: hybrid laser; aluminium; air; air coupled ... See more keywords
A time‐domain model and experimental validation of the acoustic field radiated by air‐coupled transducers
Sign Up to like & getrecommendations! Published in 2018 at "Ultrasonics"
DOI: 10.1016/j.ultras.2017.07.020
Abstract: HIGHLIGHTSA time‐domain model of an air‐coupled, non‐contact, ultrasonic setup, is proposed.The receiver size and the attenuation in air are modelled.The prediction error is evaluated experimentally and is smaller than 1%.The experimental recovery of the system's… read more here.
Keywords: symbol; response; air coupled; field ... See more keywords
Fabrication and Characterization of a Wideband Low-Frequency CMUT Array for Air-Coupled Imaging
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Sensors Journal"
DOI: 10.1109/jsen.2020.3007068
Abstract: The capacitive micro-machined ultrasonic transducer (CMUT) has a good acoustic matching with air. In this paper, a 16-element CMUT array for airborne application is designed and fabricated by SOI wafer bonding process. All the CMUT… read more here.
Keywords: cmut; cmut array; air; coupled imaging ... See more keywords
An Optimization and Comparative Study of Air-Coupled CMUT Cells With Circular and Annular Geometries
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"
DOI: 10.1109/tuffc.2017.2739692
Abstract: Air-coupled capacitive micromachined ultrasonic transducers (CMUTs) with annular cell geometry have recently been reported to have a promising transmit sensitivity. This paper reports three optimization schemes, which further improve the transmit sensitivity and also help… read more here.
Keywords: air coupled; cmut; optimization; cell ... See more keywords
Air-Coupled Ultrasound Time Reversal (ACU-TR) For Subwavelength Nondestructive Imaging
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control"
DOI: 10.1109/tuffc.2019.2951312
Abstract: Air-coupled ultrasound (ACU) is increasingly used for nondestructive testing (NDT). With ACU, no contact or coupling agent (e.g., water and ultrasound gel) is needed between transducers and test sample, which provides high measurement reproducibility. However,… read more here.
Keywords: time; coupled ultrasound; air coupled; reversal acu ... See more keywords
In-vivo 3D corneal elasticity using air-coupled ultrasound optical coherence elastography.
Sign Up to like & getrecommendations! Published in 2019 at "Biomedical optics express"
DOI: 10.1364/boe.10.006272
Abstract: Corneal elasticity can resist elastic deformations under intraocular pressure to maintain normal corneal shape, which has a great influence on corneal refractive function. Elastography can measure tissue elasticity and provide a powerful tool for clinical… read more here.
Keywords: coupled ultrasound; elasticity; corneal elasticity; air coupled ... See more keywords
AIR PRESSURE DISTRIBUTION INDUCED BY RAINFALL INFILTRATION IN SOIL/WATER/AIR COUPLED SIMULATION
Sign Up to like & getrecommendations! Published in 2017 at "International Journal of Geomate"
DOI: 10.21660/2017.32.6610
Abstract: Recently, the frequency of torrential rainfall has increased due to global climate change, and these events cause sediment potential failure. It is difficult to predict when and where a slope failure will occur because of… read more here.
Keywords: air coupled; infiltration; air; water air ... See more keywords