Simulation of buoyancy-driven fracture propagation using the displacement discontinuity boundary element method

E. Detournay, J. A.L. Napier

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A coupled flow and fracture propagation model is described for the simulation of buoyancy-driven propagation of volcanic dyke structures. The fluid properties are assumed to be Newtonian and the elastic interaction between the opening volume of the crack structure and the surrounding rock is evaluated using displacement discontinuity boundary element influence functions. The shape of the evolving crack is represented by unstructured triangular elements with a region of moving elements at the crack edge. A refinement of this approach is described to allow differential renewal of the edge region, depending on the incremental propagation distance. This approach is compared to a simpler computation strategy using regular fixed grid elements with no specific control of the asymptotic crack edge opening shape. Some illustrative examples are provided to indicate the large-scale footprint shape of a dyke structure and the effect of source flow duration.

Original languageEnglish (US)
Title of host publicationAdvances in Engineering Materials, Structures and Systems
Subtitle of host publicationInnovations, Mechanics and Applications - Proceedings of the 7th International Conference on Structural Engineering, Mechanics and Computation, 2019
EditorsAlphose Zingoni
PublisherCRC Press/Balkema
Pages525-530
Number of pages6
ISBN (Print)9781138386969
DOIs
StatePublished - Jan 1 2019
Event7th International Conference on Structural Engineering, Mechanics and Computation, 2019 - Cape Town, South Africa
Duration: Sep 2 2019Sep 4 2019

Publication series

NameAdvances in Engineering Materials, Structures and Systems: Innovations, Mechanics and Applications - Proceedings of the 7th International Conference on Structural Engineering, Mechanics and Computation, 2019

Conference

Conference7th International Conference on Structural Engineering, Mechanics and Computation, 2019
CountrySouth Africa
CityCape Town
Period9/2/199/4/19

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  • Cite this

    Detournay, E., & Napier, J. A. L. (2019). Simulation of buoyancy-driven fracture propagation using the displacement discontinuity boundary element method. In A. Zingoni (Ed.), Advances in Engineering Materials, Structures and Systems: Innovations, Mechanics and Applications - Proceedings of the 7th International Conference on Structural Engineering, Mechanics and Computation, 2019 (pp. 525-530). (Advances in Engineering Materials, Structures and Systems: Innovations, Mechanics and Applications - Proceedings of the 7th International Conference on Structural Engineering, Mechanics and Computation, 2019). CRC Press/Balkema. https://doi.org/10.1201/9780429426506-92