19 鋼球落下標準AE源を介した計測値と割れの大きさの対応(昭和49年学協会刊行物掲載論文再録集)

概要

論文の詳細を見る
A linear correlation in log-log plot between energy of acoustic emission and area of crack was obtained in a tearing test of TIG welded specimen. Energy of AE was calibrated in comparison with a standard AE source which was generated by a steel ball dropped on the tested specimen from a known height. As for the standard AE, experiments show that: (1) ringing frequency of standard AE signal is approxmately inversely proportional to the diameter of a ball and independent of the dropping height and the thickness of plate, (2) the amplitude of standard AE signal is proportional to the 2/3 power of the dropping height. These results were well explained by a theory on rebound height of dropped ball.
独立行政法人海上技術安全研究所の論文
1975-01-25