Advanced SearchSearch Tips
A Study on Determination of by Time-Frequency Analysis Method
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
A Study on Determination of by Time-Frequency Analysis Method
Nam, Gi-U; An, Seok-Hwan; Kim, Bong-Gyu;
  PDF(new window)
Elastic-plastic fracture toughness JIC can be used a s an effective design criterion in elastic-plastic fracture mechanics. Among the JIC test methods approved by ASTM, unloading compliance method was used in this study. In order to examine the relationship between fracture behavior of JIC test and AE signals, the post processing of AE signals has been carried out by Short Time Fourier Transform(STFT), one of the time-frequency analysis methods. The objective of this study is to evaluate the application of characterization of AE signals for unloading compliance method of JIC test. As a result of time-frequency analysis, we could extract the AE from the raw signal and analyze the frequencies in AE signal at the same time. AE signal generated by elastic-plastic fracture of material has some different aspects at elastic and plastic ranges, or the first portion of crack growth by fracture. First of all, increased energy recorded and detected by using AE count method increase rapidly from the start of ductile fracture. The variation of main frequency range with time-frequency analysis method could be confirmed. We could know fracture behavior of interior material by examination AE characteristics generated in real-time when elastic-plastic fracture occurred in material under loading.
Elastic-Plastic Toughness;Acoustic Emission;Unloading Compliance;Signal Characteristics;Time-Frequency Analysis;Nondestructive Evaluation;
 Cited by
시간-주파수 해석법에 의한 $J_{IC}$결정에 관한 연구,남기우;안석환;김봉규;

대한기계학회논문집A, 2001. vol.25. 5, pp.765-771 crossref(new window)
'Standard Test Method for JIC, A Meseare of Fracture Toughness,' ASTM E 813-81

Standard Test Method for JIC. JSME S001, 1981

원종일, 석창성, 1999, '역사이클하중이 원자력배관재료의 파괴저항곡선에 미치는 영향,' 대한기계학회논문집, 제23권, 제7호, pp. 1112-1119

석창성, 강병구, 'SA508CL.Ia 탄소강 배관소재의 파괴저항특성,' 대한기계학회논문집, 제23권, 제7호, pp. 1147-1154

오세욱, 임만배, 김진선, 'J적분을 이용한 원자력 압력용기강의 파괴인성치의 결정,' 한국해양공학회지, 제9권, 제1호, pp. 111-119

석창성, 최용식, 'J-R곡선에서의 균열길이 감소현상에 대한 연구(Ⅱ),' 대한기계학회논문집, 제16권, 제9호, pp. 1627-1631

Desai, J. D. and Gerberich, W. W., 1975 'Analysis of Incremental Cracking by The Stress-Wave Emission Technique,' Enginerring Fracture Mechanics, Vol. 7, p.153 crossref(new window)

Mori, Y., Kuribayashi, K., Kishi, T., Shirasuna, Y., Niitsuma, H., Takahashi, H., Yuuki, R. and Kitagawa, H., 1981, 'Procedure of Round Robin Tests on Estabilshment of Elastic-Plastic Fracture Toughness Testing Method by Means of AE,' JSNT, Vol. 30, pp. 837-841

Ando, K., Obata, Y., Sakaki, M., Schimada, M., Nakano, M. and Ueyama, H., 1981, 'Elastic-Plastic Fracture Toughness and Acoustic Emission of Rolled Steel for General Structure (SS41),' JSNT, Vol. 30, pp. 868-869

Kobayashi, H., Takashima, N., Nakamura, H. and Nakazawa, H., 1981, Elastic-Plastic Fracture Toughness of High-Tensile Steels (HT60, HT80) and 304 Stainless Steel,' JSNT, Vol. 30, pp. 918-621

Fukuzawa, Y., Nakamura, T., Ringshall, N. W. and Adachi, A., 1983, 'Correlation between the Micro-fracture Behavior and AE Characteristics on Stells,' JSNT, Vol. 32, pp. 544-553

Nam, K. W., Lee, K. C. and Oh, J. H., 1999, 'Application of Joint Time Frequency Analysis Methods of Nondestructive Evaluation,' AMD-Vol.234/NDE-Vol.17, The 1999 ASME International Mechanical Engineering Congress & Exposition, November 14 - 19, 1999, Nashville, Tennessee, pp. 67-74

Allan, M. and Stuat, K., 1991, 'The Time-Frequency Analysis of Ultrasonic Signals,' Review of Progress in Quantitative Nondestructive Evaluation, Vol. 10, pp. 741-748

Malik, M. A., Jin, X. M. and Saniie, J., 1996, 'Joint Time-Frequency Processing of Ultrasonic Signals,' Review of Progress in Quantitative Nondestructive Evaluation, Vol. 15, pp. 2089-2096

이건찬, 오정환, 남기우, 이주석, 1999, '열화된 SUS316강의 시간-주파수 해석에 의한 비파괴평가,' 비파괴검사학회지, 제19권, 제4호, pp. 270-276

김현수, 강창룡, 남기우, 2000, '고강도 구조용 내화강의 피로특성 및 음향방출신호의 시간-주파수 해석,' 대한금속.재료학회지, 제38권, 제11호, pp. 1478-1482