Repair of Cracked Structures under Dynamic Load Using Electromechanical Admittance Approach

Providakis, C. P.

doi:10.4028/www.scientific.net/kem.348-349.49

Cited by 3 publications

(3 citation statements)

References 7 publications

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“…Rybicki and Kanninen 87 estimated the SIF for mode I and mode II of a single analysis with a constant strain and stress analysis using the FE method and simulated for a double cantilever beam (DCB) test specimen. Providakis 88 investigated the repair method for the cracked structure under dynamic load using the electromechanical admittance approach (EMA). The author used the 3D FEM method to model a cantilever beam with the combination of two different healthy and cracked structures’ admittance signatures in the specific frequency range.…”

Section: Repair/control Methods In Fracture Mechanics Studiesmentioning

confidence: 99%

Review of Piezoelectric Actuator Applications in Damaged Structures: Challenges and Opportunities

et al. 2023

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Piezoelectric material transducers can work as an actuator or sensor. Generally, the actuator will be used to repair the structure, and the sensor will be used to find the health condition. In the last two decades, piezoelectric actuators have shown the capacity to lower and control the shear stress concentration and joint edge peel in adhesively bonded joint systems. Hence, this paper aims at reviewing the application of piezoelectric actuators in damaged structures and adhesively bonded combined systems based on three different repair investigation methods: analytical, numerical, and experimental. Moreover, the study also explores the delamination control of composite material beams and some other studies using a piezoelectric actuator. The specific aim of this work is to determine scientific challenges and future opportunities for considering piezoelectric materials in damaged structure investigations for novice researchers.

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Section: Repair/control Methods In Fracture Mechanics Studiesmentioning

confidence: 99%

Review of Piezoelectric Actuator Applications in Damaged Structures: Challenges and Opportunities

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Another line of investigation can be found in the study conducted by Providakis [3], who explored structures under dynamic loading. In his work, the author presented an investigation related to the repair of the cracks formed in the structures, based on the electromechanical admittance (EMA) approach.…”

Section: Active Repair Of Isotropic Materialsmentioning

confidence: 99%

“…None of the existing research related to applications of piezoelectric actuators in repair and control have presented a clear definition of the terms "Active Repair" [3,4] or "Control" [5,6]. The terms have been used interchangeably by several researchers in describing the same concept.…”

Section: Introductionmentioning

confidence: 99%

Survey of Active Structural Control and Repair Using Piezoelectric Patches

Abuzaid¹,

Hrairi²,

Dawood³

2015

Actuators

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Abstract:The piezoelectric actuator has gained popularity over the last few years. Attention has been directed towards the study of their electromechanical response in active repair and the control of damaged structures. This has been made possible through the development of various numerical and analytical techniques for such studies. The shift of focus towards the piezoelectric based approaches has been due to their advantages, which include strategic cost benefits in maintenance, as well as an increase in the life cycle of the repaired structures. Furthermore, adhesively bonded joints are widely used in the manufacturing and repairing of structures in many industries, especially automotive and aerospace engineering. This is due to the requirement for lightweight materials as well as the potential adhesive used to join materials with different characteristics. The piezoelectric actuator has also shown the capacity in controlling and lowering the shear stress concentration and joint edge peel in adhesively bonded joint systems. The structure's control of stress and repair can generally be viewed as a reinforcement that influences the structure's damage tolerance. Therefore, the interest of this review is on the applications of the piezoelectric actuators in both structural damage and the bonded adhesive joint system. The specific goal is to recognize the contemporary scientific challenges, including future opportunities.

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Modified Swift Criteria for Residual Strength of Multiple Site Damage Structure

Zhang

Bao

Fei

2009

KEM

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As more aircrafts reach or exceed their design life, it is becoming very important to research multiple cracks damage, especially the multiple site damage (MSD) in order to re-evaluate their service life and damage tolerance/durability performance. The existing of MSD may remarkably reduce the residual strength of an aerospace structural component than those with a singe lead crack. This study investigated the residual strength of aluminum alloy sheet with MSD through three types of aluminum specimens test. Aluminum panels with bare collinear constant diameter holes were chosen as specimens. After some constant amplitude tension-tension load cycles, the MSD were found in these specimens since there were multiple fatigue cracks emanating from the saw cuts of holes. The residual strength was recorded as the maximum load when every specimen was subjected to monotonically increasing tensile load until failure occurred. In different failure prediction criteria that were often used in engineering in order to evaluate the accuracy of these criteria, Swift criterion (ligament yield) criterion got more accurate prediction results than other criteria. Although Swift criterion was more accurate than some other criteria, its error was still big for some specimens. Two modified approaches were proposed in order to get more accurate and appropriate failure criterion for MSD structure.

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Repair of Cracked Structures under Dynamic Load Using Electromechanical Admittance Approach

Cited by 3 publications

References 7 publications

Review of Piezoelectric Actuator Applications in Damaged Structures: Challenges and Opportunities

Review of Piezoelectric Actuator Applications in Damaged Structures: Challenges and Opportunities

Survey of Active Structural Control and Repair Using Piezoelectric Patches

Modified Swift Criteria for Residual Strength of Multiple Site Damage Structure

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