A unified first-order hyperbolic model for nonlinear dynamic rupture processes in diffuse fracture zones | Sciact - Система учета научной деятельности ИМ СО РАН

A unified first-order hyperbolic model for nonlinear dynamic rupture processes in diffuse fracture zones Научная публикация

Журнал

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
ISSN: 1364-503X , E-ISSN: 1471-2962

Вых. Данные

Год: 2021, Том: 379, Номер: 2196, Номер статьи : 20200130, Страниц : DOI: 10.1098/rsta.2020.0130

Ключевые слова

complex fault and secondary crack topology; diffuse interface/phase field approach; dynamic earthquake rupture; multi-physics coupling within fault zones; nonlinear large-strain elasto-plasticity; thermodynamically compatible systems

Авторы

Gabriel A.-A. ¹ , Li D. ¹ , Chiocchetti S. ³ , Tavelli M. ³ , Peshkov I. ³ , Romenski E. ^2,3 , Dumbser M. ³

Организации

1	Ludwig-Maximilians-Universität München, Theresienstr. 41, München, 80333, Germany
2	Sobolev Institute of Mathematics, 4 Acad. Koptyug Avenue, Novosibirsk, 630090, Russian Federation
3	Laboratory of Applied Mathematics, University of Trento, Via Mesiano, 77, Trento, 38123, Italy

Earthquake fault zones are more complex, both geometrically and rheologically, than an idealized infinitely thin plane embedded in linear elastic material. To incorporate nonlinear material behaviour, natural complexities and multi-physics coupling within and outside of fault zones, here we present a first-order hyperbolic and thermodynamically compatible mathematical model for a continuum in a gravitational field which provides a unified description of nonlinear elasto-plasticity, material damage and of viscous Newtonian flows with phase transition between solid and liquid phases. The fault geometry and secondary cracks are described via a scalar function ξ ∈ [0, 1] that indicates the local level of material damage. The model also permits the representation of arbitrarily complex geometries via a diffuse interface approach based on the solid volume fraction function α ∈ [0, 1]. Neither of the two scalar fields ξ and α needs to be mesh-aligned, allowing thus faults and cracks with complex topology and the use of adaptive Cartesian meshes (AMR). The model shares common features with phase-field approaches, but substantially extends them. We show a wide range of numerical applications that are relevant for dynamic earthquake rupture in fault zones, including the co-seismic generation of secondary off-fault shear cracks, tensile rock fracture in the Brazilian disc test, as well as a natural convection problem in molten rock-like material. This article is part of the theme issue 'Fracture dynamics of solid materials: from particles to the globe'.

Gabriel A.-A. , Li D. , Chiocchetti S. , Tavelli M. , Peshkov I. , Romenski E. , Dumbser M.
A unified first-order hyperbolic model for nonlinear dynamic rupture processes in diffuse fracture zones
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 2021. V.379. N2196. 20200130 . DOI: 10.1098/rsta.2020.0130 WOS Scopus OpenAlex

Web of science:	WOS:000629688600013
Scopus:	2-s2.0-85102914080
OpenAlex:	W3038810594

БД	Цитирований
Scopus	24
OpenAlex	12
Web of science	25