발간논문

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Vol.38, No.11, 1478 ~ 1483, 2000
Title
Fatigue Characteristics of High Strength Fire Resistance Steel for Frame Structure and Time - Frequency Analysis of its Acoustic Emission Signals
김현수Hyun Soo Kim,강창용Chang Yong Kang,남기우Ki Woo Nam
Abstract
In this study, we analysed acoustic emission signals obtained in fatigue and tensile test of high strength fire resistance steel for frame structure with time-frequency analysis methods. The results obtained are summaries as follows; Fatigue life of TL direction specimen was shorter than LT specimen due to easiness of crack propagation. There was a little effect to fatigue crack propagation rate by N addition and with changing rolling condition, but fatigue life was increased by B addition. The main frequency range is different in the noise and the fatigue crack propagation. It could be classified that it were also generated by composite fracture mechanics of cleavage, dimple, inclusion separation etc.
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