HYDRAULIC FRACTURE TESTING OF CYLINDRICAL CONCRETE SPECIMENS AND ULTIMATE PRESSURE ESTIMATES BASED ON LOCAL AND NONLOCAL FAILURE CRITERIA
M.A. Legan, V.A. Blinov, A.N. Novoselov
Lavrentyev Institute of Hydrodynamics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
Keywords: hydraulic fracturing, brittle fracture, alumina cement-based concrete, nonlocal failure criterion
Abstract
An experimental study of hydraulic fracturing of thick-walled concrete cylinders with a central hole is conducted using a high-pressure fluid test setup. The cylinders are made of sand-based concrete with GTs 50 alumina cement. Estimates of the ultimate pressure obtained using local and nonlocal failure criteria are compared with experimental data. Satisfactory agreement between the calculated ultimate loads and the experimental failure data under nonuniform stress conditions is shown to be achieved with nonlocal failure criteria.
|
