THE USE OF NONLOCAL CRITERIA IN FORECASTING FRACTURE OF QUASI-BRITTLE MATERIAL WITH A HOLE UNDER COMPRESSION

摘要: The study is aimed at the development of new failure criteria for quasi-brittle materials in conditions stress concentration. possibility using non-local description brittle, and ductile fracture with notches analyzed. general feature these consists introduction internal dimension characterizing structure material, which provides describing a large-scale effect concentration thereby expand area their application compared to traditional though it limited cases brittle or small pre-ffacture zone. To broaden scope developed pre-fracture zone we propose abandon hypothesis about size as constant related only material. A number nonlocal criteria, are mean fictitious crack, developed, substantiated from physical standpoint, proved experimentally. These contain complex parameter taking into account not structure, but also properties specimen geometry loading conditions. expressions critical pressure problem tensile crack formation upon compression samples geomaterials circular hole derived. results calculations match rather well experimental data on destruction drilled gypsum slabs.