Numerical simulation of fracture in rocks

Yurii P. Stefanov, Viktor D. Evseev

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

Аннотация

The processes of localized deformation band formation and crack generation in brittle-plastic materials are simulated numerically in various loading conditions. The patterns of cracking and strain localized band for a sandstone specimen in compression and are obtained. To describe inelastic behavior of pressure-sensitive materials, the mathematical tools and concepts of plasticity theory are employed. In the computations the Nikolaevskii model with a non-associated flow rule is used. In the course of "plastic" deformation damages, are accumulated. Macrocrack opening and material fracture are described explicitly. For this purpose the node-splitting technique is used and the free-surface conditions are given on newly formed boundaries. This provides self-acting account of crack generation for the entire calculation area in the course of deformation. The use of the considered approaches in describing the behavior of a rock specimen as an ideal homogeneous medium allows a good agreement of fracture patterns as well as of various types of stress-strain dependences with the experimental findings. In order to describe in detail the behavior peculiarities of heterogeneous porous and cracked materials, it is necessary to give due consideration for their structural features and crack growth.

Язык оригиналаАнглийский
Название основной публикации11th International Conference on Fracture 2005, ICF11
Страницы4455-4460
Число страниц6
Том6
СостояниеОпубликовано - 2005
Событие11th International Conference on Fracture 2005, ICF11 - Turin, Италия
Продолжительность: 20 мар 200525 мар 2005

Другое

Другое11th International Conference on Fracture 2005, ICF11
СтранаИталия
ГородTurin
Период20.3.0525.3.05

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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  • Цитировать

    Stefanov, Y. P., & Evseev, V. D. (2005). Numerical simulation of fracture in rocks. В 11th International Conference on Fracture 2005, ICF11 (Том 6, стр. 4455-4460)