Results 31 to 40 of about 440 (132)

Effect of External Vibration on PZT Impedance Signature

open access: yesSensors, 2008
Piezoelectric ceramic Lead Zirconate Titanate (PZT) transducers, working on the principle of electromechanical impedance (EMI), are increasingly applied for structural health monitoring (SHM) in aerospace, civil and mechanical engineering.
Yaowen Yang, Aiwei Miao
doaj   +1 more source

Mechanical and Non-Destructive Study of CFRP Adhesive Bonds Subjected to Pre-Bond Thermal Treatment and De-Icing Fluid Contamination

open access: yesAerospace, 2018
Composite materials are commonly used in many branches of industry. One of the effective methods to join the carbon fibre reinforced polymer (CFRP) parts includes the use of adhesives.
Paweł H. Malinowski   +3 more
doaj   +1 more source

Effects of Applying Different Resonance Amplitude on the Performance of the Impedance-Based Health Monitoring Technique Subjected to Damage

open access: yesSensors, 2018
Smart materials such as piezoelectric transducers can be used for monitoring the health of building structures. In this study, a structural health monitoring technique known as the electromechanical impedance (EMI) method is investigated.
Wongi S. Na   +3 more
doaj   +1 more source

Electromechanical Impedance Response of a Cracked Timoshenko Beam

open access: yesSensors, 2011
Typically, the Electromechanical Impedance (EMI) technique does not use an analytical model for basic damage identification. However, an accurate model is necessary for getting more information about any damage.
Cuiqin Wu   +4 more
doaj   +1 more source

A PCA-Based Approach for Very Early-Age Hydration Monitoring of Self-Compacting Concrete Using Embedded PZT Sensors

open access: yesSensors, 2023
This work proposed a novel approach based on principal component analyses (PCAs) to monitor the very early-age hydration of self-compacting concrete (SCC) with varying replacement ratios of fly ash (FA) to cement at 0%, 15%, 30%, 45%, and 60 ...
Qunfeng Liu   +4 more
doaj   +1 more source

Experimental Study on Damage Detection in Timber Specimens Based on an Electromechanical Impedance Technique and RMSD-Based Mahalanobis Distance

open access: yesSensors, 2016
In the electromechanical impedance (EMI) method, the PZT patch performs the functions of both sensor and exciter. Due to the high frequency actuation and non-model based characteristics, the EMI method can be utilized to detect incipient structural ...
Dansheng Wang   +3 more
doaj   +1 more source

New Advances in Space SHM Project [PDF]

open access: yesINCAS Bulletin, 2015
This paper is based on a consistent family of experimental data obtained in a national research project. More accurate, specimens representing spacecraft structures, accomplished from aluminum circular plates with PWAS bonded on them were subjected to ...
Adrian TOADER, Ioan URSU, Daniela ENCIU
doaj   +1 more source

A Study of Concrete Slab Damage Detection Based on the Electromechanical Impedance Method

open access: yesSensors, 2014
Piezoelectric lead zirconate titanate (PZT) is being gradually applied into practice as a new intelligent material for structural health monitoring. In order to study the damage detection properties of PZT on concrete slabs, simply supported reinforced ...
Xianyan Hu, Hongping Zhu, Dansheng Wang
doaj   +1 more source

Damage Identification in Plate Structures Using Sparse Regularization Based Electromechanical Impedance Technique

open access: yesSensors, 2020
This paper proposes a novel structural damage quantification approach using a sparse regularization based electromechanical impedance (EMI) technique. Minor structural damage in plate structures by using the measurement of only a single surface bonded ...
Xingyu Fan, Jun Li
doaj   +1 more source

Soft Skins With Reversible Thickness Morphing: Materials, Mechanisms, and Applications

open access: yesAdvanced Materials, EarlyView.
Evolution of electronic skin (e‐skin) technologies toward adaptive, multifunctional soft skins. Phase I highlights early rigid and discrete sensory interfaces. Phase II shows the transition toward flexible, stretchable, and large‐area e‐skin. Phase III captures the emergence of computational e‐skin.
Oliver Ozioko   +2 more
wiley   +1 more source

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