Volume 13, Issue 6 (2013)                   Modares Mechanical Engineering 2013, 13(6): 20-29 | Back to browse issues page

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Abstract:   (3958 Views)
In this paper, the effect of bandwidth and loading level parameters changes of random load histories on the fatigue crack growth is studied by the central limit theory. In this method, the life probabilistic distribution and probability of failure function and reliability function are derived by the central limit theory. The walker equation is used to account the stress ratio effect in the fatigue crack growth rate equations. Then, the theoretical results are verified by the test results in the three random loading conditions with the various bandwidths and loading levels. A good agreement among the theory and test results was observed. The probability of failure and reliability diagrams via number of cycles is presented too.
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Article Type: Research Article | Subject: Creep, Fatigue & Failure|Analytical Methods
Received: 2013/01/7 | Accepted: 2013/02/23 | Published: 2013/07/6