ORCID Profile
0000-0001-9565-7571
Current Organisation
University of Nottingham
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Publisher: Elsevier BV
Date: 07-2021
Publisher: Wiley
Date: 18-10-2018
DOI: 10.1002/NAG.2865
Publisher: Research Square Platform LLC
Date: 27-04-2023
DOI: 10.21203/RS.3.RS-2635293/V1
Abstract: Fractures are ubiquitous and lead to catastrophic failure of materials. While fracture in a two-dimensional plane is well understood, all fractures are, in fact, extended and propagate in a three-dimensional space and their behavior is more complex. Here we show that forward propagation of a fracture front always occurs through an initial rupture, nucleated at some localized position, followed by very rapid transverse expansion at velocities as high as the Rayleigh-wave speed. We study a circular geometry to achieve an uninterrupted extended fracture front and use fluid to control the loading conditions that determine the litude of the forward jump we find this litude correlates with the transverse velocity. Dynamic rupture simulations capture the observations for only high transverse velocity. These results highlight the importance of transverse dynamics in the forward propagation of extended fracture.
Publisher: American Geophysical Union (AGU)
Date: 08-2017
DOI: 10.1002/2017JB014301
Publisher: Elsevier BV
Date: 02-2021
Publisher: American Physical Society (APS)
Date: 15-07-2021
Publisher: Elsevier BV
Date: 08-2021
Publisher: Wiley
Date: 05-09-2021
DOI: 10.1002/NME.6816
Abstract: We present a 3D hybrid method which combines the finite element method (FEM) and the spectral boundary integral method (SBIM) to model nonlinear problems in unbounded domains. The flexibility of FEM is used to model the complex, heterogeneous, and nonlinear part— such as the dynamic rupture along a fault with near fault plasticity—and the high accuracy and computational efficiency of SBIM is used to simulate the exterior half spaces perfectly truncating all incident waves. The exact truncation allows us to greatly reduce the domain of spatial discretization compared to a traditional FEM approach, leading to considerable savings in computational time and memory requirements. The coupling of FEM and SBIM is achieved by the exchange of traction and displacement boundary conditions at the computationally defined boundary. The method is suited to implementation on massively parallel computers. We validate the developed method by means of a benchmark problem. Three more complex ex les with a low velocity fault zone, low velocity off‐fault inclusion, and interaction of multiple faults, respectively, demonstrate the capability of the hybrid scheme in solving problems of very large sizes. Finally, we discuss potential applications of the hybrid method for problems in geophysics and engineering.
Publisher: Elsevier BV
Date: 04-2020
Location: United States of America
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Gabriele Albertini.