Investigations on pulse compression favourable thermal imaging approaches for characterisation of glass fibre‐reinforce polymers. Issue 19 (1st September 2020)

• Record Type: Journal Article
• Authors: Rani, A.; Mulaveesala, R.
• Is Part Of: Electronics letters. Volume 56:Issue 19(2020)
• Page Start: 995
• Page End: 998
• Publication Date: 2020-09-01
• Subjects: pulse compression -- nondestructive testing -- infrared imaging -- photothermal effects -- glass fibre reinforced plastics; magnetic prosperities -- thermal response -- predefined incident heat flux -- subsurface anomalies -- quantitative testing capabilities -- fibre reinforced polymers -- glass fibre‐reinforced polymer -- subsurface hidden defects -- pulse compression favourable thermal wave imaging -- modulated heat fluxes -- test specimen -- time‐domain pulse compression based approach -- pulse compression favourable thermal imaging approaches -- glass fibre‐reinforce polymers -- promising remote -- field characterisation techniques -- nondestructive testing -- electrical prosperities; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2020.0789
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : Active infrared imaging is one of the promising remote and whole field characterisation techniques for non‐destructive testing and evaluation of various solids irrespective of their electrical and magnetic prosperities. This technique relies on a mapping of thermal response for a predefined incident heat flux over the test object to detect the presence of surface and subsurface anomalies. Due to its fast, non‐contact, safe and quantitative testing capabilities, infrared thermography has gained significant importance in the testing of fibre reinforced polymers. This Letter highlights testing and evaluation of glass fibre‐reinforced polymer (GFRP) specimen for detection of subsurface hidden defects using pulse compression favourable thermal wave imaging techniques (for an imposed digitised chirp as well as a 7‐bit Barker coded modulated heat fluxes over the test specimen). Further depth scanning capabilities of the proposed schemes have been compared using a time‐domain pulse compression based approach. Proposed analytical, as well as simulation studies, have been validated with the experimental results on GFRP material having flat bottom holes as defects.