Open AccessFracture of quasi-brittle geomaterials with a circular hole under compression
Author(s) -
S. V. Suknev
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/773/1/012082
Subject(s) - materials science , fracture (geology) , ultimate tensile strength , brittleness , compression (physics) , gypsum , stress (linguistics) , composite material , brittle fracture , microstructure , point (geometry) , geometry , mathematics , philosophy , linguistics
The new nonlocal fracture criteria are proposed, which are the extension of the average stress criterion and the point stress criterion, and which contain a complex parameter that characterizes the size of the fracture process zone and accounts not only for the material microstructure, but also ductile properties of the material, geometry of the specimen, and its loading conditions. The formulas are obtained for the critical pressure in the problem of tensile fracture initiation in the specimens of geomaterials containing a circular hole and subjected to uniformly or nonuniformly distributed compression. The results of the calculations are in good agreement with the experimental data on failure of gypsum plates with a hole.