A thermal emissions-based real-time monitoring system for in situ detection of fatigue cracks

التفاصيل البيبلوغرافية
العنوان:	A thermal emissions-based real-time monitoring system for in situ detection of fatigue cracks
المؤلفون:	Amjad, K, Lambert, P, Middleton, CA, Greene, RJ, Patterson, EA
بيانات النشر:	The Royal Society
سنة النشر:	2022
المجموعة:	The University of Liverpool Repository
الوصف:	The advent of packaged infrared (IR) bolometers has led to thermography-based techniques becoming popular for non-destructive evaluation of aerospace structures. In this work, a real-time monitoring system for in situ crack detection has been presented which uses an original equipment manufacturer microbolometer. The system costs one-tenth the price of a packaged bolometer and has the potential to transform the use of IR imaging for condition and structural health monitoring in the aerospace industry and elsewhere. A computer, consisting of a single circuit board with dimensions comparable to a credit card, has been integrated into the system for real-time, on-board data processing. Crack detection has been performed based on the principles of thermoelastic stress analysis (TSA). Proof-of-concept laboratory tests were performed on open-hole aluminium specimens to compare the performance of the proposed system against a state-of-the-art cooled IR photovoltaic effect detector. It was demonstrated that cracks as small as 1 mm in length can be detected with loading frequencies as low as 0.3 Hz. This represents a significant advance in the viability of TSA-based crack detection in large-scale structural tests where loading frequencies are usually lower than 1 Hz.
نوع الوثيقة:	article in journal/newspaper
وصف الملف:	text
اللغة:	English
Relation:	http://livrepository.liverpool.ac.uk/3165201/1/rspa.2021.0796.pdf; Amjad, K orcid:0000-0002-9348-0335 , Lambert, P orcid:0000-0001-9525-0667 , Middleton, CA orcid:0000-0001-9488-9717 , Greene, RJ orcid:0000-0002-5373-0598 and Patterson, EA orcid:0000-0003-4397-2160 (2022) A thermal emissions-based real-time monitoring system for in situ detection of fatigue cracks. PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 478 (2266).
DOI:	10.1098/rspa.2021.0796
الاتاحة:	http://livrepository.liverpool.ac.uk/3165201/ https://doi.org/10.1098/rspa.2021.0796 http://livrepository.liverpool.ac.uk/3165201/1/rspa.2021.0796.pdf
رقم الانضمام:	edsbas.5AF982B4
قاعدة البيانات:	BASE

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