アルミニウムの疲労過程におけるAE特性について

概要

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We investigated AE (acoustic emission) properties in a fatigue test of an aluminum alloy and the frequency analysis of measured waveforms, The results obtained are as follows. (1) The occurrence patterns of an AE event in the fatigue process have three stages according to the fatigue damage; therefore we can monitor the progress of the fatigue damage of the specimen by monitoring the AE event count. (2) In the case of the pulsating fatigue test, a high AE event count was obtained near the pulsating load to be maximum. (3) The AE energy rate at the first load showed a maximum and increased with increasing stress amplitude. (4)A good correlation between the AE energy at the first load and number of cycles to failure was obtained enabling us to predict the lifetime of the specimen from the AE energy rate at the first load.
1996-05-25