Introduction
One of the most common incipient losses of structural integrity in mechanical structures is the development and propagation of cracks. A crack may propagate from some small imperfections on the surface of the body or inside of the material and it is most likely to appear in correspondence of high stress concentration. For example, figure 1.1 shows a crack developed in the stiffening plate of a generator casing.
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Bachschmid, N., Pennacchi, P., Tanzi, E. (2010). Cracks in Rotating Shafts. In: Cracked Rotors. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-01485-7_1
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