Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 08, 2016 - October 10, 2016
Sonic-IR, which is based on the thermographic detection of the temperature rise due to frictional heating at the defect faces under ultrasonic excitation, has an advantage in the detection of closed defects. In the present study, we investigate the fundamental physics of heat generation at defects by using the Sonic-IR method. A contact point between a hemisphere specimen and a beam specimen was observed, and the relationship between the temperature rise at the contact point and the contact position exhibited a distribution with several peaks. The distribution of heat generation corresponded with the distribution of vibration obtained by FEM analysis.
