Results 21 to 30 of about 4,578 (258)
Procedia CIRP, 2018 Abstract Among the methods used in structural health monitoring (SHM), the electromechanical impedance technique (EMI), which uses piezoelectric transducers of lead zirconate titanate (PZT), stands out for its low cost. Then, this paper presents a new approach for monitoring of the dressing operation from the digital processing of voltage signals ...
Pedro Oliveira da Conceição Junior +5 more
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Crack Identification in Necked Double Shear Lugs by Means of the Electro-Mechanical Impedance Method
Sensors, 2020 This contribution investigates fatigue crack detection, localization and quantification in idealized necked double shear lugs using piezoelectric transducers attached to the lug shaft and analyzed by the electro-mechanical impedance (EMI) method.
Markus Winklberger +4 more
doaj +1 more source
The Scientific World Journal, 2014 This study developed an integrated global-local approach for locating damage on building structures. A damage detection approach with a novel embedded frequency response function damage index (NEFDI) was proposed and embedded in the Imote2.NET-based ...
Tzu-Hsuan Lin +2 more
doaj +1 more source
Buildings, 2021 As a key load-bearing element in a prestressed structure, the anchor should be appropriately monitored to secure its as-built prestressing force. In previous studies, the impedance-based prestress force monitoring technique through a mountable lead ...
Thanh-Cao Le +2 more
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Advances in Mechanical Engineering, 2015 An analytical model on electromechanical coupling coefficient and the length optimization of a bending piezoelectric ultrasonic transducer are proposed. The piezoelectric transducer consists of 8 PZT elements sandwiched between four thin electrodes, and ...
Qiang Zhang, Shengjun Shi, Weishan Chen
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Electromechanical Impedance-Based Damage Detection Using Machine Learning Approaches
Ingeniería e InvestigaciónElectromechanical impedance-based structural health monitoring has been the subject of extensive research in recent decades. The method’s low cost and ability to detect minor structural damages make it an appealing alternative to other non-destructive ...
Paulo Elias Carneiro Pereira +4 more
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Sensors, 2023 The present research proposes a two-step physics- and machine-learning(ML)-based electromechanical impedance (EMI) measurement data evaluation approach for sandwich face layer debonding detection and size estimation in structural health monitoring (SHM ...
Christoph Kralovec +3 more
doaj +1 more source
Interface monitoring of steel-concrete-steel sandwich structures using piezoelectric transducers
Nuclear Engineering and Technology, 2019 Steel-concrete-steel (SCS) sandwich structures have important advantages over conventional concrete structures, however, bond-slip between the steel plate and concrete may lead to a loss of composite action, resulting in a reduction of stiffness and ...
Jiachuan Yan +3 more
doaj +1 more source
Proceedings of the 8th International Symposium on NDT in Aerospace, 2016 Numerous techniques of non-destructive testing (NDT) of structural parts of CFRP are investigated. In this paper electromechanical impedance (EMI) technique is studied as an NDT tool for assessment of adhesive bonds. In order to perform the assessment a surface mounted piezoelectric sensor is used.
Malinowski, Paweł Henryk +2 more
openaire +2 more sources
Creep Properties and Deformation Mechanism of Additively Manufactured NiAl‐CrMo Composites
Advanced Engineering Materials, EarlyView.Additively manufactured NiAl‐CrMo composites contain numerous interfaces and cell boundaries that control their creep response. At 700°C under high applied stress, creep is dominated by dislocation‐controlled power‐law mechanisms. At 800°C–900°C and lower stresses, creep is primarily diffusion‐controlled along cell boundaries.
Jan Vollhüter +9 more
wiley +1 more source