Spectral method for fatigue damage estimation with non zero mean stress is popular PDF and ePub book, written by Pedro H. Alves Corrêa in 2022-08-01, it is a fantastic choice for those who relish reading online the Technology & Engineering genre. Let's immerse ourselves in this engaging Technology & Engineering book by exploring the summary and details provided below. Remember, Spectral method for fatigue damage estimation with non zero mean stress can be Read Online from any device for your convenience.
Spectral method for fatigue damage estimation with non zero mean stress Book PDF Summary
This thesis consists of a fatigue study carried out on an aluminum alloy 2024-T3 in both time domain and frequency domain. Non-zero mean random signals of strain and stress are analyzed in time domain using usual Rainflow method and the damage is accumulated with the Palmgren-Miner rule, according to mean stress equations. The signals are analyzed in frequency domain using the power spectral density and the probability density function. The spectral domain analysis does not consider the negative effect of the mean stress in metal life under fatigue, so the correction factors for mean stresses developed by Goodman, Morrow, and Smith-Watson-Topper are used to change the power spectral density and, thus, the damage calculated by the probability density functions postulated by Dirlik and Tovo and Benasciutti. It is found that both Dirlik and Tovo and Benasciutti are non-conservative for a non-zero mean stress signal when comparing the damage to the one obtained in time domain analysis. When the spectral method is corrected, the results vary from Rainflow 4.9% for wide band and 6.8% for narrow band signals, always in the conservative zone, therefore predicting more damage. Tovo and Benasciutti 2 method is found to be the spectral function with the closest results when compared to the usual Rainflow method in time domain.
Detail Book of Spectral method for fatigue damage estimation with non zero mean stress PDF
- Author : Pedro H. Alves Corrêa
- Release : 01 August 2022
- Publisher : Editora Dialética
- ISBN : 9786525253213
- Genre : Technology & Engineering
- Total Page : 68 pages
- Language : English
- PDF File Size : 7,6 Mb
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