Title: A hybrid finite element-spectral boundary integral approach: Applications to dynamic rupture modeling in unbounded domains

Journal Article · · International Journal for Numerical and Analytical Methods in Geomechanics
DOI: https://doi.org/10.1002/nag.2865 · OSTI ID:1566410
ORCiD logo [1];  [1];  [2];  [2];  [1]
  1. Univ. of Illinois at Urbana‐Champaign, Champaign, IL (United States). Dept. of Civil and Environmental Engineering
  2. Cornell Univ., Ithaca, NY (United States). School of Civil and Environmental Engineering
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The finite element method (FEM) and the spectral boundary integral method (SBI) have both been widely used in the study of dynamic rupture simulations along a weak interface. Here, we present a hybrid method that combines FEM and SBI through the consistent exchange of displacement and traction boundary conditions, thereby benefiting from the flexibility of FEM in handling problems with nonlinearities or small-scale heterogeneities and from the superior performance and accuracy of SBI. We validate the hybrid method using a benchmark problem from the Southern California Earthquake Center's dynamic rupture simulation validation exercises.We further demonstrate the capability and computational efficiency of the hybrid scheme for resolving off-fault heterogeneities by studying a 2D in-plane shear crack in two different settings: one where the crack is embedded in a high-velocity zone and another where it is embedded in a low-velocity zone. Finally, we discuss the potential of the hybrid method for addressing a wide range of problems in geophysics and engineering.

Research Organization:
Energy Frontier Research Centers (EFRC), Washington D.C. (United States). Center for Geologic Storage of CO2 (GSCO2); Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Organization:
USDOE; USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI ID:
1566410
Journal Information:
International Journal for Numerical and Analytical Methods in Geomechanics, Journal Name: International Journal for Numerical and Analytical Methods in Geomechanics Journal Issue: 1 Vol. 43; ISSN 0363-9061
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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  • International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 33, Issue 13 https://doi.org/10.1002/nag.777
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58 GEOSCIENCES
carbon sequestration
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earthquakes
finite element
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spectral boundary integral