1. Context
Parts and structures subjected to cyclic mechanical or thermo-mechanical stresses can fail at stress levels far lower than those observed under creep or monotonic loading. Fatigue failure is often insidious, consisting of a slow process of crack propagation that can extend over several hundred or thousands of load cycles, without any detectable change in the physical-mechanical properties of the material at the scale of the part or structure in question. This has been a major scientific, technological and industrial issue since the beginning of the industrial revolution in the naval and railway industries.
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Context
Acoustic emission: reminders and definitions
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