Lamb wave-based damage imaging method for damage detection of rectangular composite plates

2014 ◽  
Vol 1 (4) ◽  
pp. 411-425
Author(s):  
Pizhong Qiao ◽  
Wei Fan
Keyword(s):  
Damage Detection ◽  
Lamb Wave ◽  
Composite Plates ◽  
Imaging Method ◽  
Damage Imaging

scholarly journals Development of Laboratory-scale Lamb Wave-based Health Monitoring System for Laminated Composites

2021 ◽  
Vol 53 (4) ◽  
pp. 210407
Author(s):  
Leonardo Gunawan ◽  
Muhammad Hamzah Farrasamulya ◽  
Andi Kuswoyo ◽  
Tatacipta Dirgantara
Keyword(s):  
Damage Detection ◽  
Health Monitoring ◽  
Lamb Wave ◽  
Laminated Composite ◽  
Composite Plates ◽  
Laboratory Scale ◽  
Optimum Number ◽  
Detection Scheme ◽  
Damage Location ◽  
Location Detection

This paper presents the development process of a laboratory-scale Lamb wave-based structural health monitoring (SHM) system for laminated composite plates. Piezoelectric patches are used in pairs as actuator/sensor to evaluate the time of flight (TOF), i.e. the time difference between the transmitted/received signals of a damaged plate and those of a healthy plate. The damage detection scheme is enabled by means of evaluating the TOF from at least three actuator/receiver pairs. In this work, experiments were performed on two GFRP plates, one healthy and the other one with artificial delamination. Nine piezoelectric transducers were mounted on each plate and the detection of the delamination location was demonstrated, using 4 pairs and 20 pairs of actuators/sensors. The combinations of fewer and more actuators/sensor pairs both provided a damage location that was in good agreement with the artificial damage location. The developed SHM system using simple and affordable equipment is suitable for supporting fundamental studies on damage detection, such as the development of an algorithm for location detection using the optimum number of actuator/sensor pairs.

Lamb-Wave Based Damage Detection in Anisotropic Composite Plates

2014 ◽  
Vol 627 ◽  
pp. 1-4 ◽  
Author(s):  
Z. Sharif-Khodaei ◽  
M.H. Aliabadi
Keyword(s):  
Damage Detection ◽  
Lamb Wave ◽  
Lamb Waves ◽  
Composite Plates ◽  
Detection Algorithm ◽  
Damage State ◽  
Anisotropic Composite ◽  
Cfrp Composite ◽  
The Difference ◽  
Imaging Algorithms

Damage detection in anisotropic composite plates based on Lamb wave technique has been investigated. A network of transducers is used to detect barely visible damage caused by impact. A CFRP composite plate has been impacted and tested to verify the proposed damage detection algorithms. The difference in the propagational properties of Lamb waves in the pristine state and the damage state is used through data fusion and imaging algorithms to detect, locate and characterise the damage. The influence of directionality of the velocity on the validity of the detection algorithm is examined and some results are presented.

scholarly journals Damage Detection of Composite Plates by Lamb Wave Ultrasonic Tomography with a Sparse Hexagonal Network Using Damage Progression Trends

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
C. J. Keulen ◽  
M. Yildiz ◽  
A. Suleman
Keyword(s):  
Damage Detection ◽  
Lamb Wave ◽  
Composite Structures ◽  
Composite Plates ◽  
Reconstruction Algorithm ◽  
Detection Algorithm ◽  
Ultrasonic Tomography ◽  
Large Area ◽  
Sparse Network ◽  
Damage Progression

Lamb wave based structural health monitoring shows a lot of potential for damage detection of composite structures. However, currently there is no agreement upon optimal network arrangement or detection algorithm. The objective of this research is to develop a sparse network that can be expanded to detect damage over a large area. To achieve this, a novel technique based on damage progression history has been developed. This technique gives an amplification factor to data along actuator-sensor paths that show a steady reduction in transmitted power as induced damage progresses and is implemented with the reconstruction algorithm for probabilistic inspection of damage (RAPID) technique. Two damage metrics are used with the algorithm and a comparison is made to the more commonly used signal difference coefficient (SDC) metric. Best case results show that damage is detected within 12 mm. The algorithm is also run on a more sparse network with no damage detection, therefore indicating that the selected arrangement is the most sparse arrangement with this configuration.

scholarly journals An Omnidirectional Near-Field Comprehensive Damage Detection Method for Composite Structures

2019 ◽  
Vol 9 (3) ◽  
pp. 567 ◽  
Author(s):  
Zhiling Wang ◽  
Zhenwei Xiao ◽  
Yonglin Li ◽  
Yudong Jiang
Keyword(s):  
Composite Materials ◽  
Damage Detection ◽  
Phased Array ◽  
Detection Method ◽  
Near Field ◽  
Imaging Method ◽  
Field Sampling ◽  
Damage Monitoring ◽  
Damage Imaging ◽  
Ultrasonic Phased Array

As one of the active structural health monitoring methods based on the Lamb wave, the ultrasonic phased-array damage detection method can provide information such as damage location and range more intuitively, which is why this method is a research hotspot in the field of Lamb wave-based damage monitoring. However, the ultrasonic phased-array damage detection method intended for the far field is not applicable to near-field damage monitoring. In addition, the traditional one-dimensional piezoelectric phased-array damage imaging method suffers from a blind area in the near field, and the data collection time of its angle scanning is relatively long. In view of these problems, this paper proposes an omnidirectional damage imaging monitoring method, combining the near-field sampling phased-array damage monitoring algorithm and the two-dimensional phased-array. The proposed method is verified by experiments using complex composite materials, and the results obtained show that the proposed omnidirectional near-field sampling phased-array damage imaging method is suitable for real-time damage detection in complex composite materials.

Localization of Barely Visible Impact Damage (BVID) in Composite Plates

2014 ◽  
Vol 627 ◽  
pp. 217-220 ◽  
Author(s):  
Shi Yang Meng ◽  
Zahra Sharif Khodaei ◽  
M.H. Aliabadi
Keyword(s):  
Damage Detection ◽  
Impact Damage ◽  
Composite Plates ◽  
Structural Features ◽  
Detection Technique ◽  
Stiffened Panel ◽  
Imaging Method ◽  
Flat Panel ◽  
Isotropic Composite ◽  
The Impact

This paper exploits the implementation of a delay-and-sum imaging method using Lamb wave signals to localise barely visible impact damage (BVID) in quasi-isotropic composite panels. The structural discontinuities, such as opening and stiffener, has also been tested to reflect the common structural features of an aircraft and to examine the feasibility of the proposed detection technique. The prediction results are compared with ultrasonic C-scan images, which indicate location error for three different panels –flat panel, flat panel with an opening and stiffened panel. The accuracy is believed to be improved by increasing the number of transducers. Overall the proposed damage detection technique, with the use of only four transducers, demonstrated sufficient accuracy and efficiency in impact damage detection and can be applied alongside the traditional NDT inspections for providing a priori information of the impact damage location.

A Dry-Coupled Lamb Wave Damage Imaging Method by Time-Reversal

2017 ◽  
Vol 12 (5) ◽  
pp. 532-539
Author(s):  
Ai Chun'an ◽  
Cai Xiaofeng ◽  
Li Jian ◽  
Tong Zhao
Keyword(s):  
Time Reversal ◽  
Lamb Wave ◽  
Imaging Method ◽  
Damage Imaging

Influence of Adhesive Layer on Actuation of Lamb Wave Signals

2012 ◽  
Vol 525-526 ◽  
pp. 617-620 ◽  
Author(s):  
Z. Sharif-Khodaei ◽  
Qu Liu ◽  
M.H. Aliabadi
Keyword(s):  
Lamb Wave ◽  
Adhesive Layer ◽  
Composite Plates ◽  
Wave Generation ◽  
Actuation Frequency ◽  
Adhesive Thickness

In this work, Lamb wave generation and propagation have been modelled in composite plates. Actuation and acquisition of signals when the PZT transducers are tied to the structure or bonded with an adhesive layer are investigated. The effect of adhesive thickness and actuation frequency of Lamb wave have been examined.

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