Multi-spectral near infrared NDE of polymer composites

Senni, Luca; Laureti, Stefano; Rizwan, Muhammad Khalid; Burrascano, Pietro; Hutchins, David A.; Davis, Lee A. J.; Ricci, Marco

doi:10.1016/j.ndteint.2018.12.012

Cited by 4 publications

(1 citation statement)

References 19 publications

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“…Several Non-Destructive Testing (NDT) techniques have been successfully employed for detecting defects/flaws in composite materials often used in the aerospace industry, such as carbon fibre reinforced composite (CFRP), glass laminate aluminium reinforced epoxy (GLARE) and so on. Examples of NDT techniques for investigating composites are eddy-currents [10,11,12,13,14], active thermography [15,16,17,18,19], ultrasonic testing including guided waves [20,21,22,23,24,25], shearography [26,27,28,29], and near infrared spectroscopy [30,31,32,33]. However, the choice of the optimal NDT method for a given sample depends on the physical properties and size of the specimen, as well as whether there is access to one or both sides of the sample.…”

Section: Introductionmentioning

confidence: 99%

Delamination Detection in Polymeric Ablative Materials Using Pulse-Compression Thermography and Air-Coupled Ultrasound

Laureti

Rizwan

Malekmohammadi

et al. 2019

Sensors

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Ablative materials are used extensively in the aerospace industry for protection against high thermal stresses and temperatures, an example being glass/silicone composites. The extreme conditions faced and the cost-risk related to the production/operating stage of such high-tech materials indicate the importance of detecting any anomaly or defect arising from the manufacturing process. In this paper, two different non-destructive testing techniques, namely active thermography and ultrasonic testing, have been used to detect a delamination in a glass/silicone composite. It is shown that a frequency modulated chirp signal and pulse-compression can successfully be used in active thermography for detecting such a delamination. Moreover, the same type of input signal and post-processing can be used to generate an image using air-coupled ultrasound, and an interesting comparison between the two can be made to further characterise the defect.

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Section: Introductionmentioning

confidence: 99%

Delamination Detection in Polymeric Ablative Materials Using Pulse-Compression Thermography and Air-Coupled Ultrasound

Laureti

Rizwan

Malekmohammadi

et al. 2019

Sensors

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On the Use of X-ray Computed Tomography in Assessment of 3D-Printed Components

Khosravani

Reinicke

2020

J Nondestruct Eval

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Technical advantages of additive manufacturing (AM) have drawn great attention over the past few years. This cost-effective manufacturing process proved its potential applications in a wide range of fields. Although AM techniques (known as 3D printing) are able to fabricate geometrically complex components, it is necessary to evaluate internal and external dimensions of the printed parts. In this context, x-ray computed tomography (CT) as a nondestructive evaluation technique has been utilized. Indeed, CT can be used for geometric analysis, defects detection, quantitative comparison, structural quantification and porosity analysis. In the current study, we present a brief review of 3D printing processes and evolution of CT technology. Moreover, applications of CT in assessment of 3D-printed components are explained in detail. Although CT has been used in academic and industrial researches, abilities of this inspection method are not yet fully documented for precision engineering applications. In this work, usage of this technique in study of printed components are categorized in four subdomains and discussed. The documented data proved that CT is an appropriate non-contact technique for technical evaluation of various printed parts. As usage of CT in assessment of printed parts is still evolving, the limitations, challenges and future perspective are outlined.

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