TY  - SER
AU  - Smolin,Igor Yu
AU  - Makarov,Pavel V.
AU  - Eremin,Mikhail O.
AU  - Bakeev,R.A.
AU  - Krasnoveikin,Vladimir A.
AU  - Kulkov,Aleksey S.
TI  - Blow-up regimes in failure of rock specimens
KW  - одноосное сжатие
KW  - образцы горных пород
KW  - катастрофическое разрушение
KW  - механическое поведение
KW  - статьи в журналах
N1  - Библиогр.: 9 назв
N2  - For damage evaluation, the stage of superfast catastrophic failure of a medium and its mechanical behavior in a state of self-organized criticality prior to the onset of a blow-up fracture mode is of great interest for identification of its precursors. In this work, the data of experimental and numerical investigations of mechanical behavior of a medium before its catastrophic failure and the onset of a blow-up fracture mode are presented. Rock samples and ceramic specimens are subjected to three-point bending and uniaxial compression testing. Surface velocities of the loaded specimens are registered using a laser Doppler vibrometer. The blow-up regime duration is measured to be about 10–20 ms. The specimens’ mechanical behavior is numerically simulated under experimental conditions, including the regime of catastrophic fracture. The model parameters of damage accumulation are determined from a comparison with the experimental data. A number of features of the material mechanical response before the catastrophic fracture are identified, which could be treated as failure precursors
UR  - http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000623877
ER  -