Water detection in honeycomb composite structures using terahertz thermography

Чулков, А. О.; Gavérina, Ludovic; Pradère, Christophe; Batsale, Jean Christophe; Вавилов, В. П.

doi:10.1134/s1061830915080033

Cited by 18 publications

(4 citation statements)

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“…In this study, we compare results of infrared (IR) thermographic and TeraHertz (THz) NDT of glass fiber reinforced plastic (GFRP) by using the Tanimoto criterion and analyzing heuristically some other characteristics of inspection performance. Our start point is that IR thermography is the acknowledged technique for detecting and evaluating discontinuities in GFRP in a one-sided test procedure [8][9][10][11][12][13][14], while the THz method is a promising newcomer in the field of NDT of composites [15][16][17][18]. The comparison of these two methods is of interest in the aviation and aerospace industry where composites are successfully replacing metals.…”

Section: Introductionmentioning

confidence: 99%

Analyzing efficiency of optical and THz infrared thermography in nondestructive testing of GFRPs by using the Tanimoto criterion

Чулков

Sommier

Pradère

et al. 2021

NDT & E International

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This study has illustrated the potentials of optical and THz infrared thermography in the identification of inserts of different nature in glass fiber reinforced polymer. The inspection efficiency has been comparatively evaluated by applying the Tanimoto criterion. The best test procedure has proven to be one-sided stationary thermal nondestructive testing (TNDT) implementing optical heating with Xenon lamps (Tanimoto criterion 87%). Close values of the Tanimoto criterion have been achieved by using the optical and THz line-scanning procedures. A more subjective evaluation of test procedures has been performed by comparing eight parameters of test performance. The line-scanning TNDT procedure implementing optical heating with halogen lamps seems to be optimal in practical applications.

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Section: Introductionmentioning

confidence: 99%

Analyzing efficiency of optical and THz infrared thermography in nondestructive testing of GFRPs by using the Tanimoto criterion

Чулков

Sommier

Pradère

et al. 2021

NDT & E International

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“…Moreover, THz is a promising tool for the high-resolution electromagnetic detection and evaluation of internal voids or delamination masked by the presence of water in marine GFRP, which may be difficult for acoustic methods to inspect (Ibrahim et al, 2021). THz has been utilized for the detection of damage and water ingress in thick woven GFRP (Chulkov et al, 2015). The volumetric defects in moist GFRP laminates were successfully detected and indicated that THz has the potential for water detection in the honeycomb panels of aircraft.…”

Section: Terahertz Testingmentioning

confidence: 99%

Nondestructive testing and evaluation techniques of defects in fiber-reinforced polymer composites: A review

Chen

Jin²

2022

Front. Mater.

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Fiber-reinforced polymer composites have excellent mechanical properties and outstanding development potential and are cost-effective. They have increasingly been used in numerous advanced and engineering applications as materials for wind turbine blades, helicopter rotors, high-pressure pipelines, and medical equipment. Understanding and assessing structural failure promptly in the whole lifecycle of a composite is essential to mitigating safety concerns and reducing maintenance costs. Various nondestructive testing and evaluation (NDT&E) technologies based on different evaluation principles have been established to inspect defects under different conditions. This paper reviews the established types of NDT&E techniques: acoustic emission, ultrasonic testing, eddy current testing, infrared thermography, terahertz testing, digital image correlation, shearography, and X-ray computed tomography, which is divided into three categories based on the operation frequency and data processing means of the output signal that is directly under analysis. We listed four types of defects/damage that are currently of great interest, namely, voids and porosity, fiber waviness and wrinkling, delamination and debonding, as well as impact damage. To identify a suitable method for different defects/damage, we performed characterization and evaluation by using these NDT&E techniques for typical defects/damage. Then, the cost, inspection speed, benefits and limitations, etc. were compared and discussed. Finally, a brief overview of the development of the technologies and their applications in the field of composite fabrication was discussed.

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“…This is one of several works that used LTT to perform subsurface defect detection and characterization [ 14 ]. Other similar works were performed by Shrestha [ 15 ], Chulkov [ 16 ], Pitarresi [ 17 ], An, Y.K, [ 18 ], Zoecke [ 19 ], and Peng [ 20 ]. The usage of lasers as an excitation source is not the most common.…”

Section: Introductionmentioning

confidence: 99%

Lock-In Thermal Test Simulation, Influence, and Optimum Cycle Period for Infrared Thermal Testing in Non-Destructive Testing

Silva

Vaz

Leite

et al. 2022

Sensors

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Lock-in thermal tests (LTTs) are one of the best ways to detect defects in composite materials. The parameter that most affects their performance is the cycle period of the stimulation wave. Its influence on the amplitude-phase results was determined by performing various numeric simulations and laboratory tests. The laboratory tests were used to infer part of the simulation parameters, namely the input and output heat, corresponding to the stimulation and natural convection. The simulations and the analysis of their results focus on the heat flow inside the sample and the manner they change for different geometries. This was performed for poly(methyl methacrylate (PMMA) and carbon fiber-reinforced polymers (CFRPs). The simulation of these materials was also used to create prediction surfaces and equations. These predict the amplitude and phase for a sample with a thickness l and a cycle period. These new findings were validated with new laboratory tests and two new samples. These validated the prediction surfaces and equations and can now be used as a reference for future works and industrial applications.

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Water detection in honeycomb composite structures using terahertz thermography

Cited by 18 publications

References 4 publications

Analyzing efficiency of optical and THz infrared thermography in nondestructive testing of GFRPs by using the Tanimoto criterion

Analyzing efficiency of optical and THz infrared thermography in nondestructive testing of GFRPs by using the Tanimoto criterion

Nondestructive testing and evaluation techniques of defects in fiber-reinforced polymer composites: A review

Lock-In Thermal Test Simulation, Influence, and Optimum Cycle Period for Infrared Thermal Testing in Non-Destructive Testing

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