Modelling the mechanical structure of extreme shear ruptures with friction approaching zero generated in brittle materials

Тип публикации: статья из журнала

Год издания: 2017

Идентификатор DOI: 10.1007/s10704-017-0223-1

Ключевые слова: Structure of shear rupture, Shear rupture mechanism, Shear ruptures of extreme dynamics, Low friction, mathematical modelling

Аннотация: Experiments on frictional stick-slip instability in brittle materials and natural observations show that friction falls towards zero in the head of shear ruptures propagating with extreme velocities (up to supershear levels). Although essential for understanding earthquakes, fracture mechanics and tribology the question of what physical processes determine how weakening occurs is still unclear. Here, using a mathematical model, we demonstrate that the extremely low friction can be caused by a fan-like fault structure formed on the basis of a tensile-cracking process observed in all extreme ruptures. The mathematical model visualises and describes the fan-structure as a mechanical system during rupture propagation. It explains some features observed in laboratory experiments.

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Издание

Журнал: International Journal of Fracture

Выпуск журнала: Т.207, 1

Номера страниц: 87-97

ISSN журнала: 03769429

Издатель: Springer Science+Business Media B.V., Formerly Kluwer Academic Publishers B.V.

Авторы

  • Tarasov Boris G. (Centre for Offshore Foundation Systems, University of Western Australia)
  • Guzev Mikhail A. (Institute of Applied Mathematics of Far Eastern Branch of the Russian Academy of Sciences)
  • Sadovskii Vladimir M. (Krasnoyarsk Science Centre of the Siberian Branch of Russian Academy of Science)
  • Cassidy Mark J. (Centre for Offshore Foundation Systems, University of Western Australia)

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