the sound of breaking glass
the energy contained in the sound wave makes up only a small percentage of the energy released during fracture (about 5%)
"Listening to the sound of breaking glass,"Physics in Action, April 1998
hysteresis loop due to irradiation
"Harmonic frequency analysis of acoustic Barkhausen noise on neutron irradiated material," Korea Atomic Energy Research Institute
another fundamental ingredient usually not taken into account is the irreversablity of the rupture mechanism (.pdf)
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