Scanning induction thermography (SIT) for imaging damages in carbon-fibre reinforced plastics (CFRP) components

Thomas, K. Renil; Balasubramaniam, Krishnan

doi:10.1063/1.4914624

Cited by 13 publications

(6 citation statements)

References 1 publication

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“…Since the influence of non-uniform heating is periodically suppressed in phase images, the authors found that the damage imaging resolution (accuracy) was enhanced. Renil Thomas and Balasubramaniam [ 139 ] developed a scanning induction method for ECST on impact damaged CFRP samples, in which the induction coil moved over the sample at the speed of ~40 mm/s and the temperature profiles caused by Joule heating were captured with an IR camera. The final ECST image was compared with a standard ultrasonic C-Scan showing good agreement in terms of damage location and severity ( Figure 19 ).…”

Section: Eddy Current Stimulated Thermographymentioning

confidence: 99%

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Recent Advances in Active Infrared Thermography for Non-Destructive Testing of Aerospace Components

Ciampa

Mahmoodi

Pinto

et al. 2018

Sensors

346

185

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Active infrared thermography is a fast and accurate non-destructive evaluation technique that is of particular relevance to the aerospace industry for the inspection of aircraft and helicopters’ primary and secondary structures, aero-engine parts, spacecraft components and its subsystems. This review provides an exhaustive summary of most recent active thermographic methods used for aerospace applications according to their physical principle and thermal excitation sources. Besides traditional optically stimulated thermography, which uses external optical radiation such as flashes, heaters and laser systems, novel hybrid thermographic techniques are also investigated. These include ultrasonic stimulated thermography, which uses ultrasonic waves and the local damage resonance effect to enhance the reliability and sensitivity to micro-cracks, eddy current stimulated thermography, which uses cost-effective eddy current excitation to generate induction heating, and microwave thermography, which uses electromagnetic radiation at the microwave frequency bands to provide rapid detection of cracks and delamination. All these techniques are here analysed and numerous examples are provided for different damage scenarios and aerospace components in order to identify the strength and limitations of each thermographic technique. Moreover, alternative strategies to current external thermal excitation sources, here named as material-based thermography methods, are examined in this paper. These novel thermographic techniques rely on thermoresistive internal heating and offer a fast, low power, accurate and reliable assessment of damage in aerospace composites.

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Section: Eddy Current Stimulated Thermographymentioning

confidence: 99%

“… Comparison between eddy current stimulated thermography ( a ) and ultrasonic C-Scan ( b ) on impact damaged CFRP sample, with permission from [ 139 ]. …”

Section: Figurementioning

confidence: 99%

Recent Advances in Active Infrared Thermography for Non-Destructive Testing of Aerospace Components

Ciampa

Mahmoodi

Pinto

et al. 2018

Sensors

346

185

View full text Add to dashboard Cite

show abstract

“…In order to completely detect all segments of the crack, it is necessary to move the excitation coil to perform a scanning heat excitation. However, it is difficult to use continuous scanning approach presented in previous work [18] because PDC bits have an irregular (rather than flat) surface. Therefore, a successive scanning mode is proposed for heat excitation on PDC bits.…”

Section: Pca-based Image Reconstructionmentioning

confidence: 99%

“…These scanning thermography techniques can achieve defect detection on a large area or cylinder. For example, Thomas et al demonstrated that scanning induction thermography is effective for defect detection of composite components with flat surfaces [18]. Such achievements motivate us to develop a new scanning mode for ECPT to detect surface cracks on PDC bits with more complicated geometry.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, it is necessary to develop a new detection mode for ECPT to detect surface cracks on PDC bits. Some researchers have proposed scanning thermography techniques, such as line scanning thermography, scanning induction thermography, and so on [16][17][18]. These scanning thermography techniques can achieve defect detection on a large area or cylinder.…”

Section: Introductionmentioning

confidence: 99%

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An Investigation on Eddy Current Pulsed Thermography to Detect Surface Cracks on the Tungsten Carbide Matrix of Polycrystalline Diamond Compact Bit

Gong

Zhang

et al. 2017

Applied Sciences

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Polycrystalline diamond compact (PDC) bits are commonly used drill bits in the petroleum drilling industry. Cracks often occur on the surface of a bit, which may result in the unexpected suspension of the drilling operation, or even accidents. Therefore, the detection of surface cracks on PDC bits is of great importance to ensure continuous drilling operation and to prevent accidents. However, it is extremely difficult to detect such cracks by visual inspection or other traditional nondestructive testing (NDT) techniques due to the small size of cracks and the irregular geometry of bits. As one emerging NDT technique, eddy current pulsed thermography (ECPT) can instantly detect surface cracks on metal parts with irregular geometry. In this study, the feasibility of ECPT of detecting surface cracks on the tungsten carbide matrix of PDC bits was investigated. A successive scanning detection mode is proposed to detect surface cracks by using ECPT with a low power heating excitation unit and small-size coils. The influence of excitation duration on the detection result was also investigated. In addition, principal component analysis (PCA) was employed to process the acquired IR image sequences to improve detection sensitivity. Finally, the whole shape of a crack was restored with processed images containing varied cracks segments. Based on the experimental results, we conclude that the surface cracks on the tungsten carbide matrix of PDC bit can be detected effectively and conveniently by ECPT in scanning mode with the aid of PCA.

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Infrared Thermography Testing and Evaluation of Fiber-Reinforced Composite Materials

Zhong

Nsengiyumva

2022

Nondestructive Testing and Evaluation of Fiber-Reinforced Composite Structures

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Scanning induction thermography (SIT) for imaging damages in carbon-fibre reinforced plastics (CFRP) components

Cited by 13 publications

References 1 publication

Recent Advances in Active Infrared Thermography for Non-Destructive Testing of Aerospace Components

Recent Advances in Active Infrared Thermography for Non-Destructive Testing of Aerospace Components

An Investigation on Eddy Current Pulsed Thermography to Detect Surface Cracks on the Tungsten Carbide Matrix of Polycrystalline Diamond Compact Bit

Infrared Thermography Testing and Evaluation of Fiber-Reinforced Composite Materials

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