Characteristics of the Acoustic Emission Waveforms from the Fatigue Crack Propagation of 2024 Aluminum Alloy with Rivet Hole

J. Ocean Eng. Technol. 2001;15(1):52-56.

리벳구멍을 갖는 2024 알루미늄 합금의 피로 균열 진전 동안에 발생한 음향방출 파형 특성

남기우,안석환

부경대학교 재료공학부,부경대학교 기계공학부

Keywords: Acoustic emission, Waveform, Power spectrum, Rivet hole, Fatigue, Lamb wave

핵심용어: 음향방출, 파형, 파워 스펙트럼, 리벳구멍, 피로, 판파

Abstract

This study were looks at the effect of the initial cut length or stress concentration level, on the wave forms produced by crack propagation. The signals were collected, then classified visually for each type of sample. They were put into three classes according to their shapes in the time and frequency domain. Each class should domain signals which could be correlated to a certain micro-failure mechanism that occurs during the fatigue process. Classes of these signals compared, with each sample. To see if there were any classes common to the three samples. The fatigue test attempted to determine if the initial cut length has any influence on the type of signals.