Near-field microwave identification and quantitative evaluation of liquid ingress in honeycomb sandwich structures

Wang, Peiyu; Pei, Yongmao; Zhou, Licheng

doi:10.1016/j.ndteint.2016.06.002

Cited by 19 publications

(6 citation statements)

References 14 publications

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“…Any variation of the electromagnetic (EM) properties can be revealed in the signals received. For composites, microwave testing methods have been developed for monitoring automated tape laying (ATL) processes (62) , detection of impact damage (63)(64)(65) , delamination (66)(67)(68) , air voids (69) , lightning strike damage (70,71) and moisture ingress in sandwich structures (72,73) . Compared with the other NDT methods, microwave testing has the advantages of being non-contact, no need for surface transducers, couplants or complicated signal post-processing, it is operator friendly, relatively inexpensive and has no ionising hazards (74)(75)(76)(77) .…”

Section: Introductionmentioning

confidence: 99%

Review of microwave techniques used in the manufacture and fault detection of aircraft composites

Li¹,

Wang²,

Haigh³

et al. 2020

Aeronaut. j.

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Microwaves are a form of electromagnetic radiation commonly used for telecommunications, navigation and food processing. More recently microwave technologies have found applications in fibre-reinforced polymer composites, which are increasingly used in aircraft structures. Microwave energy can be applied with low power (up to milliwatts) for non-destructive testing and high power (up to kilowatts) for heating/curing purposes. The state-of-the-art applications at high power include curing, three-dimensional (3D) printing, joining and recycling, whereas low-power microwave techniques can provide quality checks, strain sensing and damage inspection. Low-power microwave testing has the advantage of being non-contact, there is no need for surface transducers or couplants, it is operator friendly and relatively inexpensive; high-power microwave energy can offer volumetric heating, reduced processing time and energy saving with no ionising hazards. In this paper the recent research progress is reviewed, identifying achievements and challenges. First, the critical electromagnetic properties of composites that are closely related to the heating and sensing performance are discussed. Then, representative case studies are presented. Finally, the trends are outlined, including intelligent/automated inspection and solid-state heating.

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Section: Introductionmentioning

confidence: 99%

Review of microwave techniques used in the manufacture and fault detection of aircraft composites

Li¹,

Wang²,

Haigh³

et al. 2020

Aeronaut. j.

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“…In contrast to the FF, the intensity of the NF decreases rapidly with the increase of the distance from the antenna; therefore, the NF just acts close to the antenna or the scattering objects (r λ), but the strength of NF is much stronger than the FF in the close range (r λ). More importantly, the NF does not obey the Rayleigh criterion [26] and can deliver the sub-wavelength information of the scattering or reflecting objects [27,28]. For this reason, the NF method has been widely used in microscope and achieved great success in the nanotechnology in recent years [29,30].…”

Section: Introductionmentioning

confidence: 99%

“…Up to now, the NF techniques are mainly focused on the characterization of micro-structure, and the EM waves adopted are mainly short-wavelength EM waves such as light or microwave [25,26]. In present work, we apply the NF method on the non-destructive test of macro-structure and propose a scheme to test and even image the steel corrosion under concrete by analyzing the diffracted NF of meter-band wave (λ ∼ 0.5 m), because meter-band wave can effectively penetrate the concrete cover and has a long active NF distance for the long-wavelength.…”

Section: Introductionmentioning

confidence: 99%

The Testing Scheme for Steel Corrosion in the Reinforced Concrete via Near Field Effect of Meter-Band Wave

Zhao¹,

Zhang²,

Zhou³

et al. 2017

PIER Letters

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Abstract-This paper presents a testing scheme for the steel corrosion in reinforced concrete based on near-field effect of meter wave. The physical mechanism of the near-field method was introduced, and the structure of the measurement device was presented in detail. The electromagnetic field near the steel bar buried in the concrete structure was simulated by the finite difference time domain method. The simulated data show that the mean radiation power decreases monotonously with the increase of the corroded depth of the steel bar, and the corroded area is promising to be imaged directly due to the localization of near field. The results indicate that the near-field technique can act as a new nondestructive testing technique to detect and even image the corrosion area buried in concrete in engineering structure.

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“…Wang et al[77] used a coaxial adapter to detect, identify and evaluate the liquid ingress in honeycomb sandwich structures with GFRP skins. This kind of lightweight sandwich structures are susceptible to moisture ingress.…”

mentioning

confidence: 99%

“…11. Experimental setup of the near-field microwave system for detection of liquid ingress in honeycomb sandwich structures[77].Fig. 12.…”

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confidence: 99%

A review of microwave testing of glass fibre-reinforced polymer composites

Haigh

Soutis

et al. 2019

Nondestructive Testing and Evaluation

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Near-field microwave identification and quantitative evaluation of liquid ingress in honeycomb sandwich structures

Cited by 19 publications

References 14 publications

Review of microwave techniques used in the manufacture and fault detection of aircraft composites

Review of microwave techniques used in the manufacture and fault detection of aircraft composites

The Testing Scheme for Steel Corrosion in the Reinforced Concrete via Near Field Effect of Meter-Band Wave

A review of microwave testing of glass fibre-reinforced polymer composites

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