Structural Health Monitoring: State of the Art and Perspectives

Liu, Yingtao; Nayak, S.

doi:10.1007/s11837-012-0370-9

Cited by 55 publications

(34 citation statements)

References 13 publications

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“…Real-time NDE has been under investigation as a method to monitor the integrity of materials and structures over the past two decades. Progress has been made in developing and improving real-time NDE, which allows early detection of material defects, providing timely warning to those at stake [13][14][15][16][17]. Real-time NDE technologies utilizing advanced sensors (i.e., piezoelectric ceramic sensors [18,19], impedance-based sensors [20,21], piezoresistive sensors [22,23], and fiber Brag grating sensors [24,25]) have been referred to as structural health monitoring (SMH) and prognostics.…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh Resolution Pulsed Laser-Induced Photoacoustic Detection of Multi-Scale Damage in CFRP Composites

et al. 2020

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This paper presents a photoacoustic non-destructive evaluation (pNDE) system with an ultrahigh resolution for the detection of multi-scale damage in carbon fiber-reinforced plastic (CFRP) composites. The pNDE system consists of three main components: a picosecond pulsed laser-based ultrasonic actuator, an ultrasound receiver, and a data acquisition/computing subsystem. During the operation, high-frequency ultrasound is generated by pulsed laser and recorded by an ultrasound receiver. By implementing a two-dimensional back projection algorithm, pNDE images can be reconstructed from the recorded ultrasound signals to represent the embedded damage. Both potential macroscopic and microscopic damages, such as surface notches and delamination in CFRP, can be identified by examining the reconstructed pNDE images. Three ultrasonic presentation modes including A-scan, B-scan, and C-scan are employed to analyze the recorded signals for the representation of the detected micro-scale damage in two-dimensional and three-dimensional images with a high spatial resolution of up to 60 µm. Macro-scale delamination and transverse ply cracks are clearly visualized, identifying the edges of the damaged area. The results of the study demonstrate that the developed pNDE system provides a non-destructive and robust approach for multi-scale damage detection in composite materials.

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Section: Introductionmentioning

confidence: 99%

Ultrahigh Resolution Pulsed Laser-Induced Photoacoustic Detection of Multi-Scale Damage in CFRP Composites

et al. 2020

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“…Applying different DOFSs, the evaluation of concrete and steel bridges, and others structures had performed successfully (Enckell et al 2011, Minardo et al 2012, Bastiniani et al 2005a, Bastiniani et al 2005b. However, if one of the principal aims of a SHM process is the implementation of a damage identification strategy (Liu and Nayak 2012), and the SHM system is based on DOFSs with 1 m spatial resolution, valuable data about structural damage could be lost. For example, opening cracks of the order of millimeters as sign of severe structural damage is shorter than the DOFSs 1m spatial resolution.…”

Section: Introductionmentioning

confidence: 99%

SHM by DOFS in civil engineering: a review

Rodríguez¹,

Casas²,

Villalba³

2015

Structural Monitoring and Maintenance

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Abstract. This paper provides an overview of the use of different Distributed Optical Fiber Sensor systems (DOFSs) to perform Structural Health Monitoring (SHM) in the specific case of civil engineering structures. Nowadays, there are several methods available for extracting distributed measurements from optical fiber, and their use have to be according with the aims of the SHM performance. The continuous-in-space data is the common advantage of the different DOFSs over other conventional health monitoring systems and, depending on the particular characteristics of each DOFS, a global and/or local health structural evaluation is possible with different accuracy. Firstly, the fundamentals of different DOFSs and their principal advantages and disadvantages are presented. Then, laboratory and field tests using different DOFSs systems to measure strain in structural elements and civil structures are presented and discussed. Finally, based on the current applications, conclusions and future trends of DOFSs in SHM in civil structures are proposed.

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“…Although in the past few years there has been an increased interest in the development of robust SHM systems, the implementation of such a system requires a multidisciplinary research effort in a number of areas. This includes novel sensors and sensing methodologies, improved interrogation techniques that better diagnose current state and conditions, robust approaches to characterize material behavior and predict future failures, and life assessment techniques integrated with high fidelity modeling [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A supervised outlier analysis for risk assessment in composite wing structures

Liu

Duong

2015

SPIE Proceedings

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Impact damage has been identified as a critical form of defect that constantly threatens the reliability of composite structures, such as those used in aircrafts and naval vessels. Low energy impacts can introduce barely visible damage and cause structural degradation. Therefore, efficient damage detection and risk assessment methods, which can accurately detect, quantify, and localize impact damage in complex composite structures, are required. In this paper a novel damage detection methodology is demonstrated for monitoring and quantifying the impact damage propagation. Statistical outlier analysis, composed of features extracted from the time and frequency domains, are developed. Auto-regression with exogenous is used to classify the statistical feature and estimate the structural risk. The developed methodology has been validated using low velocity impact experiments with a sandwich composite wing.

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Structural Health Monitoring: State of the Art and Perspectives

Cited by 55 publications

References 13 publications

Ultrahigh Resolution Pulsed Laser-Induced Photoacoustic Detection of Multi-Scale Damage in CFRP Composites

Ultrahigh Resolution Pulsed Laser-Induced Photoacoustic Detection of Multi-Scale Damage in CFRP Composites

SHM by DOFS in civil engineering: a review

A supervised outlier analysis for risk assessment in composite wing structures

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