4pPA1. Experimental studies of diffuse decay curvature.

Session: Thursday Afternoon, June 19

Author: John Burkhardt
Location: Dept. of Eng., Purdue Univ., Fort Wayne, IN 46805-1499


Reverberant, ultrasonic decay experiments were performed on an irregularly shaped aluminum block on which varying sized water drops were placed. The resulting nonproportionally damped systems were found to possess nonexponential decays in agreement with theoretically derived results. These findings support the author's proposition that the features of nonexponential decays are a possible quantitative nondestuctive technique for the characterization of localized fatigue damage in metals.

ASA 133rd meeting - Penn State, June 1997