The blades of windmills experience cyclic loading and hence must have excellent fatigue properties
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Blades of windmill is the most important part if a wind turbine, the blades are constructed in such a way to maximize the power generated. The blades of the windmill experience cycling loading and must have excellent fatigue properties .The fatigue property of a material is measured as follow.
Typically\ the fatigue characteristics of materials are determined by subjecting test specimens to fatigue cycles and counting the number of cycles to failure.
The R ratio of fatigue cycle is given by.
R=minimum Stress÷maximum stress
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