Abstract
Self-sustaining fracture waves hypothesized by Galin and Cherepanov (1966) have been observed in shock-compressed glasses and in Prince Rupert’s drops, but their speed did not correspond to the predicted value. This controversy is addressed in the present note. We now assume that this speed is equal to the local velocity of sound in the particulate material just behind the wave front, and show that, then, it is in a reasonable agreement with test data. The specific heat spent on the self-sustaining fracture wave in soda lime glass is estimated to be 1 to 20 J/g for moderately high pressures.
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