Relationship between Fatigue Crack Growth Rate and Total Acoustic Emission Counts per Cycle

피로균열 성장률과 싸이클당 AE수 증가율간의 상호관계

A new relationship between total acoustic emission counts per cycle and crack growth rate is derived in terms of stress intensity factor to explain the acoustic emission behavior due to fatigue crack growth. The experimental results of the total acoustic emission counts per cycle obtained from aluminium 5,000 series alloy specimens are compared with the theoretical values. Both experimental and theoretical total acoustic emission counts per cycle result in the linear relationship to the crack length.