Among structural acoustics methods, the electro-mechanical (E/M) impedance method is a new method that is easy to implement on complex structures with minimum instrumentation and straightforward results. This new acoustic method benefits from the advent of commercially available low-cost piezoceramics that have opened new opportunities for structural identification. The structural dynamics is i...

Fuzzy Logic is an Artificial Intelligence technique that is dedicated to the construction of meta-models based on the human comprehension of a specific phenomenon. When a person is capable to understand such a phenomenon, it is possible to determine the response of the plant based on subjective rules associated to the system under study. This contribution focus on the use of fuzzy logic techniq...

the importance of health indicators in the recent years has created challenges in resource allocation. balanced and fair distribution of health resources is one of the main principles in achieving equity. the goal of this cross-sectional descriptive study, conducted in 2010, was to classify health structural indicators in the fars province using the scalogram technique. health structural indica...

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 concrete slabs with piezoelectric patches attached to their surfaces were chosen as the research objects and the Electromechanical Impedance met...

We report the transformation of a conventional composite material into multifunctional structure able to provide information about its structural integrity. A purposely positioned grid carbon fabric strips located within glass fibre laminate in alternating 0/90 configuration combined with ternary nanomodified epoxy matrix imparted health monitoring (SHM) topographic capabilities using impedance...

Impact damage, excessive loading, and corrosion have been identified as critical and long-term problems that constantly threaten the integrity and reliability of structural systems (e.g., civil infrastructures, aircrafts, and naval vessels). While a variety of sensing transducers have been proposed for structural health monitoring, most sensors only offer measurement of structural behavior at d...

The use of piezoelectric wafer active sensors (PWAS) for structural health monitoring (SHM) purposes is state of the art for acousto-ultrasonic-based methods. For system reliability, detailed information about the PWAS itself is necessary. This paper gives an overview on frequent PWAS faults and presents the effects of these faults on the wave propagation, used for active acousto-ultrasonics-ba...