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New applications of a model of electromechanical impedance for SHM
SPIE Proceedings, 2014The paper focuses on the further development of the model of the electromechanical impedance (EMI) of the piezoceramics transducer (PZT) and its application for aircraft structural health monitoring (SHM). There was obtained an expression of the electromechanical impedance common to any dimension of models (1D, 2D, 3D), and directly independent from
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Electromechanical Impedance Modeling for Adhesively Bonded Piezo-Transducers
Journal of Intelligent Material Systems and Structures, 2004The electromechanical impedance (EMI) technique for structural health monitoring (SHM) and nondestructive evaluation (NDE) employs piezoelectric-ceramic (PZT) patches, which are surface bonded to the monitored structures using adhesives. The adhesive forms a finitely thick, permanent interfacial layer between the host structure and the patch.
Suresh Bhalla, Chee Kiong Soh
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Estimation of fatigue life using electromechanical impedance technique
SPIE Proceedings, 2010Fatigue induced damage is often progressive and gradual in nature. Structures subjected to large number of fatigue load cycles will encounter the process of progressive crack initiation, propagation and finally fracture. Monitoring of structural health, especially for the critical components, is therefore essential for early detection of potential ...
Yee Yan Lim, Chee Kiong Soh
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Improved Electromechanical Transduction for PiezoMUMPS HBAR Impedance Sensors
2020 Joint Conference of the IEEE International Frequency Control Symposium and International Symposium on Applications of Ferroelectrics (IFCS-ISAF), 2020This study discloses how the distribution of the effective electromechanical coupling in the modes of our HBAR ultrasonic sensors at GHz range is significantly affected by the configuration of layers and materials used for its manufacture. Using analytical models from the literature supported by FEM simulations, frequency bands with greater coupling ...
Jesus Yanez +3 more
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Bone-crack detection by piezoeletric-electromechanical impedance method
2015 International Conference on Computer, Communications, and Control Technology (I4CT), 2015There is a growing interest in the application of smart materials such as piezoelectric in the biomedical field. The work presented in this paper is an attempt to demonstrate the feasibility of bone-crack detection by using piezoelectric-electromechanical impedance (EMI) method, which has the advantages of low cost, portable and simplicity in ...
M.H. Mazlina +4 more
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Verification of impedance measurements by a volumetric and electromechanical model.
Scandinavian audiology. Supplementum, 1983A dynamic model of the middle ear and mastoid cavity will be presented. A variety of precisely controlled volumetric changes were simulated by the model, singularly or in conjunction with pressure changes, mass and friction effects at the level of the drum.
I, Eliachar +5 more
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Electromechanical Impedance Method for Applications in Boundary Condition Replication
2019One of the most challenging parts of modeling structural dynamics is realistically replicating boundary conditions from either a theoretical or experimental perspective. In a finite element model, the mechanical impedance of bolted joints in an assembly can be modeled, as a first step, as an equivalent spring-damper connection.
Timothy A. Devine +2 more
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Concrete damage diagnosis using electromechanical impedance technique
Construction and Building Materials, 2017Abstract Here an embedded piezoelectric sensor was fabricated to monitor the freezing-thawing and crack damage of concrete by using electromechanical impedance technique. The results show that the damage evolution of concrete is dependent on impedance spectra of the piezoelectric sensor.
Peng Liu +4 more
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Grinding process monitoring based on electromechanical impedance measurements
Measurement Science and Technology, 2015Grinding is considered one of the last processes in precision parts manufacturing, which makes it indispensable to have a reliable monitoring system to evaluate workpiece surface integrity. This paper proposes the use of the electromechanical impedance (EMI) method to monitor the surface grinding operation in real time, particularly the surface ...
Marchi, Marcelo +3 more
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Electromechanical Impedance Based SHM System for Aviation Applications
Key Engineering Materials, 2012This paper concerns an approach based on the electromechanical impedance for damage detection and monitoring of aircraft components. In the introductory part of the paper the theory of proposed method and the characteristics of elaborated structural health monitoring system are briefly described.
Mateusz Rosiek +2 more
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