Phased array ultrasonic inspection and automated identification of wrinkles in laminated composites

Zhang, Haiyan; Li, Peng; Zhang, Hui; Zhang, Ting; Zhu, Qihua

doi:10.1016/j.compstruct.2022.116170

Cited by 21 publications

(11 citation statements)

References 50 publications

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“…However, thin composite materials were widely inspected using Lamb waves for damage detection [ 55 ] or material properties evaluation, such as the dynamic Young’s modulus [ 56 , 57 ]. Currently, phased array transducers are widely used for composite inspection thanks to higher speed scanning, higher resolution sensing and digital imaging obtained with this technology when compared to traditional transducers [ 58 , 59 ]. Nowadays, intelligent damage recognition of composite materials, based on artificial intelligence, machine learning, and deep learning, in ultrasonic testing results is largely used [ 60 , 61 ].…”

Section: Volume Non-destructive Testing Techniquesmentioning

confidence: 99%

“…Damage monitoring can be performed in situ and in real-time, while analysing different parameters of the received acoustic emission signals, such as amplitude, cumulated counts, cumulated energy, duration, etc. [ 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 ]. This method is widely used in several industrial sectors, namely in the field of renewable energy systems and in particular for wind turbine blades [ 66 ].…”

Section: Volume Non-destructive Testing Techniquesmentioning

confidence: 99%

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Non-Destructive Health Monitoring of Structural Polymer Composites: Trends and Perspectives in the Digital Era

Chaki

Krawczak

2022

Materials

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Non-destructive testing (NDT) techniques are usually used for the characterisation of defects arising in polymer composites during manufacturing or in-service use. However, each of these NDT techniques cannot always allow a full diagnosis of the material’s or component’s structural health. Thus, several techniques have to be combined in order to improve the diagnosis of the damaged state of composite structures and their evolution during the part’s life span. This opinion paper proposes a critical overview of the use and applicability of these NDT techniques for the detection and characterisation of damage to structural composite materials in view of in-service performance assessment and residual durability prognosis. It also addresses some current trends of structural health monitoring (SHM) of these materials, such as sensor–actuator embedding and NDT data fusion, and draws future perspectives on how composite SHM could evolve in the digital era, taking advantage of artificial intelligence, Internet of Things and big data to implement digital twins.

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Section: Volume Non-destructive Testing Techniquesmentioning

confidence: 99%

Section: Volume Non-destructive Testing Techniquesmentioning

confidence: 99%

Non-Destructive Health Monitoring of Structural Polymer Composites: Trends and Perspectives in the Digital Era

Chaki

Krawczak

2022

Materials

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“…Large strain deviation in the web causes deformation in the ZD, which may generate visually observable wrinkles. When wrinkles are generated in the web, these wrinkles cause a thickness deviation in the machine direction (MD) and CMD during the coating or printing processes of the manufactured functional layer, which ultimately leads to degradation in the final products [ 38 , 39 ].…”

Section: Introductionmentioning

confidence: 99%

Web Wrinkle Defects due to Temperature Profile in Roll-to-Roll Manufacturing Systems

Noh

Jeon

et al. 2023

Polymers

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The roll-to-roll manufacturing system is extensively used for mass producing products made of plastic, paper, and fabric in several traditional industries. When flexible substrates, also known as webs, are heated and transported inside the dryer, an inconsistent temperature distribution occurs on the material in the machine direction (MD) and cross-machine direction (CMD). If rollers are not aligned in parallel on the same plane in the roll-to-roll web handling process, or if roller misalignment exists, strain deviation occurs in the web, resulting in lateral displacement and web wrinkles. Therefore, this study examined a wrinkle, which is a thermal deformation that occurs when an inconsistent web temperature distribution is formed on the material inside a dryer. The changes in the elastic modulus and thermal expansion of the web were also examined. Experiments were conducted using a PET film, and its elastic modulus and thermal expansion were examined. The results showed that the presence of a web wrinkle defect can cause a thickness deviation in the functional layer manufactured on the web. Moreover, an appropriate operating speed should be set to reduce the CMD temperature deviation, thereby reducing instances of wrinkle defects.

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“…[17] Such as nondestructive testing and evaluation and SHM techniques have involved implementing damage identification strategies for aircraft, bridges, and mechanical facilities. [18] Various crack-detection techniques, including visual investigation, electromechanical impedance, [19] ultrasonic inspection, [20][21][22] and image analysis, [23,24] have been proposed. Manual inspection has the disadvantages of high cost and low reliability, and it cannot identify cracks within the structure, [25] while the automated methods make it difficult to perform real-time monitoring and introduce high maintenance costs.…”

Section: Introductionmentioning

confidence: 99%

Piezoelectric Glass‐Fiber‐Reinforced Polymer Sensor for Structural Health Monitoring and Stiffness Sensing

Kubota²,

Kurita

et al. 2023

Adv Eng Mater

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Strengthening and repairing infrastructure with fiber‐reinforced polymers while achieving low‐cost, real‐time monitoring of cracks in engineering structures is highly challenging. Here, a piezoelectric glass‐fiber‐reinforced polymer (piezo‐GFRP) sensor was used to monitor the mechanical behavior of cement beams with cracks under cyclic bending. The output voltage and frequency of the sensor were shown to be effective feedback signals for determining the mechanical behavior. The thin piezo‐GFRP sensor showed sufficient piezoelectric sensitivity to monitor the slight variations in the mechanical behavior of the cement beams during the early stages of cracking. This result indicates that such sensors have the potential for the multi‐functional structural health monitoring of engineering structures.This article is protected by copyright. All rights reserved.

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Phased array ultrasonic inspection and automated identification of wrinkles in laminated composites

Cited by 21 publications

References 50 publications

Non-Destructive Health Monitoring of Structural Polymer Composites: Trends and Perspectives in the Digital Era

Non-Destructive Health Monitoring of Structural Polymer Composites: Trends and Perspectives in the Digital Era

Web Wrinkle Defects due to Temperature Profile in Roll-to-Roll Manufacturing Systems

Piezoelectric Glass‐Fiber‐Reinforced Polymer Sensor for Structural Health Monitoring and Stiffness Sensing

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