Evaluating impact damage in Kevlar/carbon composites by using laser vibrometry and active infrared thermography. Issue 19 (1st September 2020)

• Record Type: Journal Article
• Authors: Derusova, D.A.; Vavilov, V. P.; Chulkov, A.O.; Shagdirov, B.I.; Saeed, N.; Omar, M.
• Is Part Of: Electronics letters. Volume 56:Issue 19(2020)
• Page Start: 1001
• Page End: 1003
• Publication Date: 2020-09-01
• Subjects: carbon -- damping -- infrared imaging -- condition monitoring -- inspection -- impact (mechanical) -- structural engineering -- carbon fibres -- vibration measurement -- composite materials -- printed circuits -- nondestructive testing; laser vibrometry -- active infrared thermography -- carbon fibres -- flexible PCBs -- PCB quality -- visible impact damage -- carbon‐based composites -- inspection techniques -- detecting BVID -- composite materials -- three‐dimensional printing -- comparative analysis -- composite resistance -- multifold impacting -- additive manufacturing -- frequency 50.0 kHz to 100.0 kHz -- energy 15.0 J; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2020.1373
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : Recent developments in electronics have demonstrated some advantages of using carbon fibres in manufacturing flexible PCBs thus requiring to elaborate some new approaches for checking PCB quality. Barely visible impact damage (BVID) represents a typical type of defects in carbon‐based composites. In this study, the two inspection techniques, namely active infrared thermography and laser vibrometry, were comparatively used for detecting BVID in composite materials manufactured by three‐dimensional printing from kevlar and carbon fibres. The comparative analysis of the composite resistance towards multifold impacting with the total energy of up to 15 J has demonstrated advantages of the hybrid configuration obtained by using the technology of additive manufacturing. The measurement of damping characteristics of the composites in the 50–100 kHz frequency range has also confirmed the ability of the hybrid composite to absorb more energy than classical single component materials.