Category Archives: Fatigue Analysis

Improvement of the fatigue limit – Joints

  Improvement of joints with rows of bolts or rivets A simple double strap joint with two rows of bolts at each side of the joint is shown in the following Figure. Figure 1  It could be a good design … Continue reading

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Miner’s Rule

Miner’s rule is probably the simplest cumulative damage model. It states that if there are k different stress levels (with linear damage hypothesis)  and the average number of cycles to failure at the ith stress, Si, is Ni, then the damage fraction, … Continue reading

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Rainflow count method

The rainflow ( “rain-flow counting method”) is used in the analysis of fatigue in order to reduce a spectrum of varying stress into a set of simple stress reversals. Its importance is that it allows the application of Miner’s rule in order to assess the fatigue life of … Continue reading

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