Discussion
A rainflow count is applied to a variable-amplitude load history in order to
Answer: A
Correct answer: Extract discrete countable cycles
A real load history is an irregular sequence of peaks and troughs with no obvious cycles in it, and Miner’s rule needs discrete cycles of known amplitude and mean. Rainflow counting pairs the reversals in a way that matches the material’s hysteresis behaviour, so that a nested small excursion is counted as its own cycle within the larger one containing it.
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