作者: Giuseppe Lacidogna , Federico Accornero , Alberto Carpinteri
DOI: 10.1016/J.ENGFRACMECH.2018.06.042
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摘要: Abstract Experimental tests are carried out to evidence the energy emitted during snap-back instabilities of rock specimens in compression. Several gypsum samples with different slenderness considered, and all monitored by means Acoustic Emission (AE) technique. In particular, cumulated number AE signals is used represent energy. The performed have been controlled compression two ways: through vertical or circumferential displacement, imposing both cases a constant displacement rate. For more brittle crack propagation suddenly occurs catastrophic drop load carrying capacity, resulting appears burst curve. When elongation, damage increment measured roller-link chain wrapped around cylindrical at mid-height order obtain complete vs. response. cases, decrease propagation: totally dissipated consequently no emissions due phenomena observed, proving that crushing fracture independent physical quantities, latter from local structural