Abstract: Fracture toughness of compact samples and polymethyl methacrylate double-cantilever beams in tension is investigated experimentally and theoretically. In loading mode I, the critical loads and propagation paths of cracks in these samples differ noticeably. The theoretical model presented is based on the energy concept. It allows predicting instability of crack propagation paths. The model includes stresses in front of the crack tip and the T-stress. The theoretical model is proved using the fracture test data on a few samples with mode I cracks. The computer modeling of crack propagation is performed in the geometrically and physically nonlinear formulation. The calculation and testing data comparison shows that the crack path instability essentially depends on geometry and can be avoided by changing the sample geometry or the type of loading.

Cite: Kurguzov V.D. , Demeshkin A.G.
Curving of Normal Tension Crack Path in Brittle Fracture
Journal of Mining Science. 2021. V.57. N4. P.569–580. РИНЦ OpenAlex

Original: Кургузов В.Д. , Демешкин А.Г.
Изгиб траектории трещины нормального отрыва при хрупком разрушении
Физико-технические проблемы разработки полезных ископаемых. 2021. №4. С.36-48. DOI: 10.15372/FTPRPI20210404 РИНЦ OpenAlex

Dates:

Submitted:	Jun 1, 2021
Accepted:	Jun 30, 2021

Identifiers:

Elibrary:	47537468
OpenAlex:	W4205206994

Citing: Пока нет цитирований