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      7075 알루미늄 합금재의 피로균열 진전에 관한 연구 = A Probabilistic Analysis for Fatigue Crack Propagation of 7075 Aluminum Alloy

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      https://www.riss.kr/link?id=A2029290

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      Fatigue crack growth tests were conducted on 26 CT specimens of 7075 Aluminum alloy under identical loading conditions of constant amplitude loads. Fatigue crack propagation law, da/dN=C(△K)m was applied to each specimen and the statical characteristics of C and m among specimen were studied.
      As results, m follows a normal distribution and C follows a log-normal distribution approximately and strong negative linear correlation on the semi-log axes exists between m and log C, so it can be expressed as C=A*Bm . The average of m is 2.729, the standard deviation is 0.27 and the coefficient of variation is 0.099. The average of log C is -14.93. the standard deviation is 0.618, and the coefficient of variation is 0.041. The Fatigue crack propagation life N from certain crack length a1 to a2 follows a log-normal distribution approximately. And the coefficient of variation of N was about 0.15

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      Fatigue crack growth tests were conducted on 26 CT specimens of 7075 Aluminum alloy under identical loading conditions of constant amplitude loads. Fatigue crack propagation law, da/dN=C(△K)m was applied to each specimen and the statical characteri...

      Fatigue crack growth tests were conducted on 26 CT specimens of 7075 Aluminum alloy under identical loading conditions of constant amplitude loads. Fatigue crack propagation law, da/dN=C(△K)m was applied to each specimen and the statical characteristics of C and m among specimen were studied.
      As results, m follows a normal distribution and C follows a log-normal distribution approximately and strong negative linear correlation on the semi-log axes exists between m and log C, so it can be expressed as C=A*Bm . The average of m is 2.729, the standard deviation is 0.27 and the coefficient of variation is 0.099. The average of log C is -14.93. the standard deviation is 0.618, and the coefficient of variation is 0.041. The Fatigue crack propagation life N from certain crack length a1 to a2 follows a log-normal distribution approximately. And the coefficient of variation of N was about 0.15

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