THz spectroscopy application for detection and localisation of water inclusion in glass composite

Mieloszyk, Magdalena; Majewska, Katarzyna; Ostachowicz, Wiesław

doi:10.1016/j.compstruct.2018.03.040

Cited by 24 publications

(8 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In regards to the detection of contamination, Mieloszyk et al [63] demonstrated the imaging of a water drop placed within a stack of glass fibre reinforced polymer (GFRP). Detecting water ingress into GFRP predicts microcracking induced by the water absorption and desorption cycle.…”

Section: Polymer Compositesmentioning

confidence: 99%

Non-Contact, Non-Destructive Testing in Various Industrial Sectors with Terahertz Technology

Tao

Fitzgerald

Wallace

2020

Sensors

180

View full text Add to dashboard Cite

In this article, we survey various non-contact, non-destructive testing methods by way of terahertz (THz) spectroscopy and imaging designed for use in various industrial sectors. A brief overview of the working principles of THz spectroscopy and imaging is provided, followed by a survey of selected applications from three industries—the building and construction industry, the energy and power industry, and the manufacturing industry. Material characterization, thickness measurement, and defect/corrosion assessment are demonstrated through the examples presented. The article concludes with a discussion of novel spectroscopy and imaging devices and techniques that are expected to accelerate industry adoption of THz systems.

show abstract

Section: Polymer Compositesmentioning

confidence: 99%

Non-Contact, Non-Destructive Testing in Various Industrial Sectors with Terahertz Technology

Tao

Fitzgerald

Wallace

2020

Sensors

180

View full text Add to dashboard Cite

show abstract

“…The contaminated area (water, dust) is no bigger than ca 5–10 mm and no thicker than one layer of GFRP material. Investigation using THz spectroscopy allows to conclude that the water drop contamination is a mixture of epoxy and water where the volume fraction of water is equal to 5 per cent and its thickness is equal to 50–60 µ m (Mieloszyk et al , 2018b), the dust inclusion region is spread and its area is ca 12 × 40 mm (Mieloszyk et al , 2018a). The heat capacity of the applied materials (GFRP and OF) and contaminations (water, dust) were compared and it allowed to conclude that differences are not significantly but differ enough to applied the proposed thermography methods.…”

Section: Experimental Investigationmentioning

confidence: 99%

“…THz radiation can be used in analysis of materials that affect minimum one of three THz wave parameters: refractive index, absorption coefficient or wave scattering (Mittleman, 2013). For GFRP elements, the THz technique can be applied for identification of defects like: gaps, delaminations (Ryu et al , 2016), burning on a material surface (Stoik et al , 2010) as well as inclusion of Teflon layers (Zhang et al , 2016), water (Mieloszyk et al , 2018a, b), oil and dust (Mieloszyk et al , 2018b). THz spectroscopy allows to inspect internal structure of material and determines the inclusion location also in the sample thickness direction, but the measurement time is significantly longer than for IRT.…”

Section: Introductionmentioning

confidence: 99%

Active thermography as a tool for internal composite structure observation and evaluation

Majewska

Mieloszyk

Ostachowicz

2018

IJSI

Self Cite

View full text Add to dashboard Cite

Purpose The purpose of this paper is to study if it is possible applying infrared thermography (both vibro and pulsed) to detect and localise material discontinuities as well as to find the place where the inclusion was introduced. Design/methodology/approach The experimental investigation is performed on samples manufactured during infusion process. The measurements were performed on three four-layered rectangular composite samples with discontinuities. The discontinuities introduced in the samples were as follow: all three samples between first and second layer counting form the bottom two optical fibres (OFs) were embedded and additionally: sample no. 1 – one of the OF was broken, sample no. 2 – the drop of water was introduced, and sample no. 3 – the little amount of dust was introduced. Findings For some discontinuities, the vibrothermography is excellent tool (placement of broken OF, drop of water), for same is not sufficient (healthy OFs or dust). For dust, the pulsed thermography seems to be the required tool. Different approaches (vibrothermography and pulsed thermography) for the same sample will confirm that for same defects vibrothermograpy is better and for some pulsed thermography – complex combination of different thermography approaches is needed to have complex response about sample structural condition. Originality/value The presented paper is an original research work. There are very limited literature papers applying both vibro and pulsed thermography for one problem. The assessment of different discontinuities (inclusions) and detailed analysis is presented.

show abstract

“…Considerable efforts have been devoted to utilising non-destructive testing (NDT) for accurate evaluation of the structural integrity. A number of NDT techniques are available for selection, such as conventional strain gauges, ultrasonic testing, guided Lamb waves [2,3], acoustic emission [4], infrared thermography, optical fibre sensing, shearography, eddy current testing (ECT) [5], terahertz imaging [6] and X-ray tomography [7]. However, each NDT method has its own specific advantages, disadvantages and the applications to which it is particularly suited.…”

Section: Introductionmentioning

confidence: 99%

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

Haigh

Soutis

et al. 2019

Nondestructive Testing and Evaluation

View full text Add to dashboard Cite

show abstract

THz spectroscopy application for detection and localisation of water inclusion in glass composite

Cited by 24 publications

References 36 publications

Non-Contact, Non-Destructive Testing in Various Industrial Sectors with Terahertz Technology

Non-Contact, Non-Destructive Testing in Various Industrial Sectors with Terahertz Technology

Active thermography as a tool for internal composite structure observation and evaluation

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

Contact Info

Product

Resources

About