Issue 50

D. Triantis et alii, Frattura ed Integrità Strutturale, 50 (2019) 537-547; DOI: 10.3221/IGF-ESIS.50.45

C ONCLUSIONS

T

he experimental protocol described here was designed in order to gather data regarding the response of rock-like materials under stepwise uniaxial compression, at load levels closely approaching those causing fracture. As a first step, the acoustic activity was analyzed in terms of the improved b-value (I b -value) and the cumulative energy of the acoustic signals. It was demonstrated that, when the acoustic activity is weak, the I b -value varies in the 2

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