Sonic-IR which is based on the thermographic detection of the temperature rise due to fric tional heating at the crack faces under ultrasonic excitation, has an advantage in the det ection of closed cracks. In this study, feasibility of the Sonic-IR technique for the dete ction of stress corrosion cracking is experimentally investigated by using plate specimens....
英字タイトル:
Evaluation of Detectability of Stress Corrosion Cracking by Sonic-IR Technique

When a piezoelectric film is glued on the surface of a structure member subjected to mechanical load, a distribution of electric potential is induced. In the existence of defects in the member, a characteristic variation of electri c potential is observed. Based on this phenomenon, the passive electric potential CT method is developed for detection and identification of defects in a structure. In this study, the applicability of the passive electric potential CT method to the detection and identification o...
英字タイトル:
An Application of the Passive Electric Potential CT Method to Detection of Delamination in Composite Materials

Thermographic NDT techniques based on transient temperature distribution after active heating have been developed by many researchers as one of effective quantitative nondestructive testing techniques. The interest of the researchers has been focused on how to process transient temperature data after active heating i.e., pulse heating or step heating, to conduct successful identification of defect parameters such as its depth, shape and size. In this paper, a new data processing technique based on the Four...
英字タイトル:
Nondestructive Defect Monitoring Using Infrared Thermography