Online detection of barely visible low-speed impact damage in 3D-core sandwich composite structure

Sikdar, Shirsendu; Kudela, Paweł; Radzieński, Maciej; Kundu, Amit; Ostachowicz, Wiesław

doi:10.1016/j.compstruct.2017.11.067

Cited by 44 publications

(16 citation statements)

References 31 publications

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“…Many researches have been conducted to detect BVID in laminated composites using different NDE techniques [7][8][9][10][11]. Polimeno et al [12] used the Nonlinear Elastic Wave Spectroscopy (NEWS) to detect BVID in carbon fiber composite plates.…”

Section: Introductionmentioning

confidence: 99%

Barely visible impact damage assessment in laminated composites using acoustic emission

Saeedifar

Najafabadi

Zarouchas

et al. 2018

Composites Part B: Engineering

106

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Despite the key advantages of Fiber Reinforced Polymer (FRP) composites, they are susceptible to Barely Visible Impact Damage (BVID) under transverse loadings. This study investigates BVID in two quasi-isotropic carbon/ epoxy laminates under quasi-static indentation and Low-Velocity Impact (LVI) loadings using Acoustic Emission (AE). First, the evolution of interlaminar and intralaminar damages is studied by analyzing the AE signals of the indentation test using b-value and sentry function methods. Then, the specimens are subjected to the LVI loading and the induced damages are compared with the indentation test and the percentage of each damage mechanism is calculated using Wavelet Packet Transform (WPT). In consistent with the mechanical data, ultrasonic C-scan and digital camera images of the specimens, the AE results show a considerable similarity between the induced BVID under quasi-static indentation and LVI tests. Finally, the obtained results show that AE is a powerful tool to study BVID in laminated composites under quasi-static and dynamic transverse loadings.

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Section: Introductionmentioning

confidence: 99%

Barely visible impact damage assessment in laminated composites using acoustic emission

Saeedifar

Najafabadi

Zarouchas

et al. 2018

Composites Part B: Engineering

106

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“…Analysis of the information signal form allows to get a greater number of diagnostic signs, perform object diagnostics under the condition of a limited amount of information, and provides high noise immunity of the system, and modern computing systems, signal acquisition, and processing devices allow to implement high complexity analysis algorithms, thereby increasing the accuracy of control [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Method of Reference Signals Creating in Non-Destructive Testing Based on Low-Speed Impact

2021

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The article describes the approach to the formation of a simulation model of information signals, which are typical for objects with different types of defects. The dispersive analysis of the signal spectrum components in the bases of the discrete Hartley transform and the discrete cosine transform is carried out. The analysis of the form of the reconstructed information signal is carried out depending on the number of coefficients of the spectral alignment in Hartley bases and cosine functions. The basis of orthogonal functions of a discrete argument is obtained, which can be used for the spectral transformation of information signals of a flaw detector. A method of simulation of information signals has been developed and experimentally investigated, which allows taking into account the deterministic and random components of the characteristics of real information signals. References 24, figures 13, tables 3.

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“…In several construction requirements, two or more such composite laminates are bonded with epoxy adhesives and debonds can occur at such adhesive interfaces, due to temperature fluctuations, improper handling, impact, fatigue and ageing [5,6,7,8,9]. Hence, fast and effective nondestructive evaluation and structural health monitoring (SHM) strategies are required to detect such hidden debonds under variable ambient temperature conditions, in order to avoid catastrophic failures while the structure is in-service [9,10]. Moreover, study of temperature effects on debond response is also important, as the change in temperature can significantly affect the results from such monitoring strategies [11].…”

Section: Introductionmentioning

confidence: 99%

“…Ultrasonic guided wave propagation-based SHM strategies have proven their potential to effectively identify hidden defects in complex layered materials [7,8,9,10,11,12,13,14,15]. As the piezoelectric transducer (PZT)-induced guided wave propagation-based SHM techniques offer long-distance inspection potential due to the penetration capacity into different layers in the composites with less attenuation [12,13,14,15].…”

Section: Introductionmentioning

confidence: 99%

Nondestructive Analysis of Debonds in a Composite Structure under Variable Temperature Conditions

Sikdar

Kundu

Jurek

et al. 2019

Sensors

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This paper presents a nondestructive analysis of debonds in an adhesively-bonded carbon-fibre reinforced composite structure under variable temperature conditions. Towards this, ultrasonic guided wave propagation based experimental analysis and numerical simulations are carried out for a sample composite structure to investigate the wave propagation characteristics and detect debonds under variable operating temperature conditions. The analysis revealed that the presence of debonds in the structure significantly reduces the wave mode amplitudes, and this effect further increases with the increase in ambient temperature and debond size. Based on the debond induced differential amplitude phenomenon, an online monitoring strategy is proposed that directly uses the guided wave signals from the distributed piezoelectric sensor network to localize the hidden debonds in the structure. Debond index maps generated from the proposed monitoring strategy show the debond identification potential in the adhesively-bonded composite structure. The accuracy of the monitoring strategy is successfully verified with non-contact active infrared-thermography analysis results. The effectiveness of the proposed monitoring strategy is further investigated for the variable debond size and ambient temperature conditions. The study establishes the potential for using the proposed damage index constructed from the differential guided wave signal features as a basis for localization and characterization of debond damages in operational composite structures.

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Online detection of barely visible low-speed impact damage in 3D-core sandwich composite structure

Cited by 44 publications

References 31 publications

Barely visible impact damage assessment in laminated composites using acoustic emission

Barely visible impact damage assessment in laminated composites using acoustic emission

Method of Reference Signals Creating in Non-Destructive Testing Based on Low-Speed Impact

Nondestructive Analysis of Debonds in a Composite Structure under Variable Temperature Conditions

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