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http://dx.doi.org/10.3795/KSME-A.2002.26.4.745

Evaluation of Depth of Surface-breaking Slit by Nondestructive Self-calibrating Technique Using Laser Based Ultrasound  

Lee, Jun-Hyeon (부산대학교 기계공학부)
Choe, Sang-U (부산대학교 대학원)
Ha, Sang-Bong (부산대학교 대학원)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.26, no.4, 2002 , pp. 745-753 More about this Journal
Abstract
It is required to evaluate nondestructively the crack depth of surface-breaking cracks for the assurance of safety of structure. Optical generation of ultrasound produces well defined pulses with a repeatable frequency content, that are free of any mechanical resonances; they are broad band and are ideal for the measurement of attenuation and scattering over a wide frequency range. Self-calibrating surface signal transmission measurement is very sensitive and practical tool for surface-breaking crack depth. In this paper, the self-calibrating technique by laser-based ultrasound is used to evaluate the depth of surface-breaking crack of material. It is suggested that the relationship between the signal transmission and crack depth can be used as a practical model for predicting the surface-breaking crack depths from the signal transmission measured in structure.
Keywords
Self-Calibrating Technique; Nondestructive Evaluation; Laser Based Ultrasound; Surface-Breaking Crack; One-sided Technique;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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