Discrete simulation of defect flows and fragmentation of 2D interfaces under contact interaction

D. D. Moiseenko, S. V. Panin, E. N. Iriskina, P. V. Maksimov, S. N. Kupriyanov, I. G. Goryacheva

Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

Аннотация

The paper is devoted to multiscale computer modelling of defect flows along interfaces in loaded solids. Interfaces are considered as 2D self-organized subsystems. Discrete approach of stochastic excitable cellular automata (SECA, [1, 2]) was extended by adding of special algorithm of astable cellular automata (ACA) to simulate defect propagation and microcrack nucleation. SECA method provides 3D-modelling at mesoscale and it takes into account grain structure of the material; the ACA provides microscale simulations of 2D interface behaviour. Microcrack is considered as a specific "phase state" of local material volume. Defect flows are controled by specific "driving force" calculated from the values of material torsion, couple forces and hydrostatic pressures distributed at the interface. Numerical experiments of fragmentation and fracture in 2D interface show quasiperiodic cyclic character of microcrack nucleation and defect propagation. Computer simulation method based on excitable cellular automata allowed revealing undetected effects in the form of propagation of spiral waves in specimen under indentation. It is shown that rotational wave flows of defects are able to cause forming of quasiperiodical defect structures along the interface.

Язык оригиналаАнглийский
Название основной публикации19th European Conference on Fracture
Подзаголовок основной публикацииFracture Mechanics for Durability, Reliability and Safety, ECF 2012
ИздательEuropean Conference on Fracture, ECF
ISBN (печатное издание)978-5-905576-18-8
СостояниеОпубликовано - 1 янв 2012
Событие19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012 - Kazan, Российская Федерация
Продолжительность: 26 авг 201231 авг 2012

Конференция

Конференция19th European Conference on Fracture: Fracture Mechanics for Durability, Reliability and Safety, ECF 2012
СтранаРоссийская Федерация
ГородKazan
Период26.8.1231.8.12

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality

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