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http://dx.doi.org/10.3795/KSME-A.2003.27.6.923

Probabilistic Fatigue Crack Growth Behavior under Constant Amplitude Loads  

Jeong, Hyeon-Cheol (부경대학교 대학원 기계공학과)
Kim, Seon-Jin (부경대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.27, no.6, 2003 , pp. 923-929 More about this Journal
Abstract
In this paper, an analysis of fatigue crack growth behavior from a statistical point of view has been carried out. Fatigue crack growth tests were conducted on sixteen pre-cracked compact tension (CT) specimens of the pressure vessel (SPV50) steel in controlled identical load and environmental conditions. The assessment of the statistical distribution of fatigue crack growth experimental data obtained from SPV50 steel was studied and also the correlation of the parameter C and m in the Paris-Erdogan law was discussed. The probability distribution function of fatigue crack growth life seems to follow the 3-parameter Weibull. The fatigue crack growth rate seems to follow the 3-parameter Weibull and the log-normal distribution. The coefficient of variation (COV) of fatigue crack growth life was observed to decrease as the crack grows. Fatigue crack growth rate data shows a normal distribution for both m and logC. A strong negative linear correlation exists between the coefficient C and the exponent m.
Keywords
Probabilistic Fatigue Crack Growth; Constant Amplitude Loads; Weibull Distribution; Log-Normal Distribution; Normal Distribution;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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