Please use this identifier to cite or link to this item: http://hdl.handle.net/2080/4314
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dc.contributor.authorSharma, Manish-
dc.contributor.authorBose, Tanmoy-
dc.date.accessioned2024-01-16T06:06:18Z-
dc.date.available2024-01-16T06:06:18Z-
dc.date.issued2023-12-
dc.identifier.citation33rd Annual Conference and Exhibition on Non Destructive Evaluation & Enabling Technologies (NDE 2023), Pune, India, 7-9 December 2023en_US
dc.identifier.urihttp://hdl.handle.net/2080/4314-
dc.descriptionCopyright belongs to proceeding publisheren_US
dc.description.abstractIn this paper, local defect resonance-based vibrothermography has been studied for different sweep direction and ranges. Two different carbon fiber-reinforced polymer (CFRP) composite plate has been fabricated from vacuum assisted resin transfer molding. Two barely visible impact damages are created in plate using low velocity impact testing. The area of delamination has been determined from phased array ultrasound testing. Laser doppler vibrometry (LDV) has been performed first for different sweep ranges and directions. The CFRP plate is excited with a piezoelectric element at 150 Vpp and the vibration over defect area is captured using a single point laser doppler vibrometer, operating in scanning mode. It has been found that vibration amplitude at local defect resonance (LDR) frequency increases in narrow sweep range compared to a wideband excitation. Again, in both cases, it has been found that backward sweep produces more amplitude compared to forward one due to softening nonlinearity. An asymmetry in LDR frequency is also been observed when the sweep range is further narrowed. An uncooled microbolometer camera is used for reception in case of vibrothermography. Backward sweep is found to be more effective as compared to the forward one and the temperature increment increases in case of narrowband excitation range.en_US
dc.subjectLocal Defect Resonanceen_US
dc.subjectSweep Vibro-thermographyen_US
dc.subjectLaser Doppler Vibrometryen_US
dc.subjectBarely Visible Impact Damageen_US
dc.subjectCarbon Fiber Reinforced Polymer Compositeen_US
dc.titleAsymmetry around Local Defect Resonance Frequency in Sweep Vibro-thermographyen_US
dc.typePresentationen_US
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