Ultrasound excited thermography is used to determine the length of vertical surface breaking cracks. Two methods are proposed based on the analysis of the maximum temperature reached along the line containing the crack and the time at which the maximum temperature occurs. It is shown that, for short bursts, the full width at half maximum of the maximum temperature curve provides the crack length, and that the time at which the maximum temperature occurs increases beyond the crack tip. The range of application of the methods is analysed and the validity is checked taking data on samples containing artificial calibrated cracks.
Sizing the length of surface breaking cracks using vibrothermography / Cavallone, C.; Colom, M.; Mendioroz, A.; Salazar, A.; Palumbo, D.; Galietti, U.. - In: NDT & E INTERNATIONAL. - ISSN 0963-8695. - STAMPA. - 112:(2020). [10.1016/j.ndteint.2020.102250]
Sizing the length of surface breaking cracks using vibrothermography
Palumbo D.;Galietti U.
2020-01-01
Abstract
Ultrasound excited thermography is used to determine the length of vertical surface breaking cracks. Two methods are proposed based on the analysis of the maximum temperature reached along the line containing the crack and the time at which the maximum temperature occurs. It is shown that, for short bursts, the full width at half maximum of the maximum temperature curve provides the crack length, and that the time at which the maximum temperature occurs increases beyond the crack tip. The range of application of the methods is analysed and the validity is checked taking data on samples containing artificial calibrated cracks.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
