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Uploaded byDr Mohamed Elfarran
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MEP 209: Design of Machine elements LEC 5
The document discusses fatigue in materials, detailing its causes, failure mechanisms, and methodologies for predicting fatigue life through stress-based, strain-based, and linear elastic fracture mechanics approaches. Historical examples illustrate the consequences of fatigue, such as the Meudon train crash and de Havilland Comet accidents, both attributed to fatigue failure. The text also covers the stages of crack propagation and presents empirical data on fatigue strength through various test methods.
