52 citations · 296 across the 17 of their papers we have counts for
18 papers
A phase-field model for quasi-dynamic nucleation, growth, and propagation of rate-and-state faults
Fan Fei, Md Shumon Mia, Ahmed E. Elbanna +1
Despite its critical role in the study of earthquake processes, numerical simulation of the entire stages of fault rupture remains a formidable task. The main challenges in simulat…
Frequency of surveillance testing necessary to reduce transmission of SARS-CoV-2
Ahmed Elbanna, Nigel Goldenfeld
We estimate the reduction in transmission of SARS-CoV-2 achievable by surveillance testing of a susceptible population at different frequencies, comparing the cases of both the ori…
A three-dimensional hybrid finite element -- spectral boundary integral method for modeling earthquakes in complex unbounded domains
Gabriele Albertini, Ahmed Elbanna, David S. Kammer
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…
Modeling COVID-19 dynamics in Illinois under non-pharmaceutical interventions
George N. Wong, Zachary J. Weiner, Alexei V. Tkachenko +3
We present modeling of the COVID-19 epidemic in Illinois, USA, capturing the implementation of a Stay-at-Home order and scenarios for its eventual release. We use a non-Markovian a…
On the use of Multigrid Preconditioners for Topology Optimization
Darin Peetz, Ahmed Elbanna
Topology optimization for large scale problems continues to be a computational challenge. Several works exist in the literature to address this topic, and all make use of iterative…
Supershear shock front contribution to the tsunami from the 2018 7.5 Palu, Indonesia earthquake
Faisal Amlani, Harsha S. Bhat, Wim J. F. Simons +7
Hazardous tsunamis are known to be generated predominantly at subduction zones. However, the 2018 Mw 7.5 Sulawesi (Indonesia) earthquake on a strike-slip fault generated a tsunami…
Characterization of fracture in topology-optimized bio-inspired networks
Chantal Nguyen, Darin Peetz, Ahmed E. Elbanna +1
Designing strong and robust bio-inspired structures requires an understanding of how function arises from the architecture and geometry of materials found in nature. We draw from t…
An Adaptive Quasi-Continuum Approach for Modeling Fracture in Networked Materials: Application to Modeling of Polymer Networks
Ahmed Ghareeb, Ahmed Elbanna
Materials with network-like microstructure, including polymers, are the backbone for many natural and human-made materials such as gels, biological tissues, metamaterials, and rubb…
Network models for characterization of trabecular bone
Avik Mondal, Chantal Nguyen, Xiao Ma +2
Trabecular bone is a lightweight, compliant material organized as a web of struts and rods (trabeculae) that erode with age and the onset of bone diseases like osteoporosis, leadin…
A new hybrid numerical scheme for modeling elastodynamics in unbounded media with near-source heterogeneities
Setare Hajaroalsvadi, Ahmed Elbanna
The Finite Difference (FD) and the Spectral Boundary Integral (SBI) methods have been used extensively to model spontaneously propagating shear cracks in a variety of engineering a…
A Model for Athermal Strain Localization in Dry Sheared Fault Gouge
Xiao Ma, Ahmed Elbanna
Shear banding is widely observed in natural fault zones as well as in gouge layers in laboratory experiments. Understanding the dynamics of strain localization under different load…
Localization and instability in sheared granular materials: Role of friction and vibration
Konik R. Kothari, Ahmed Elbanna
Shear banding and stick-slip instabilities have been long observed in sheared granular materials. Yet, their microscopic underpinnings, interdependencies and variability under diff…
Stick-slip instabilities in sheared granular flow: the role of friction and acoustic vibrations
Charles K. C. Lieou, Ahmed E. Elbanna, J. S. Langer +1
We propose a theory of shear flow in dense granular materials. A key ingredient of the theory is an effective temperature that determines how the material responds to external driv…
Crack Propagation in Bone on the Scale of Mineralized Collagen Fibrils : Role of Polymers with Sacrificial Bonds and Hidden Length
Wenyi Wang, Ahmed Elbanna
Sacrificial bonds and hidden length (SBHL) in structural molecules provide a mechanism for energy dissipation at the nanoscale. It is hypothesized that their presence leads to grea…
Shear flow of angular grains: acoustic effects and non-monotonic rate dependence of volume
Charles K. C. Lieou, Ahmed E. Elbanna, J. S. Langer +1
Naturally-occurring granular materials often consist of angular particles whose shape and frictional characteristics may have important implications on macroscopic flow rheology. I…
A two-scale model for sheared fault gouge: Competition between macroscopic disorder and local viscoplasticity
Ahmed E. Elbanna, Jean M. Carlson
We develop a model for sheared gouge layers that accounts for the local increase in temperature at the grain contacts during sliding. We use the shear transformation zone (STZ) the…
Grain fragmentation in sheared granular flow: weakening effects, energy dissipation, and strain localization
Charles K. C. Lieou, Ahmed E. Elbanna, Jean M. Carlson
We describe the shear flow of a disordered granular material in the presence of grain fracture using the shear-transformation-zone (STZ) theory of amorphous plasticity adapted to s…
Sacrificial bonds and hidden length in biomaterials -- a kinetic, constitutive description of strength and toughness in bone
Charles K. C. Lieou, Ahmed E. Elbanna, Jean M. Carlson
Sacrificial bonds and hidden length in structural molecules account for the greatly increased fracture toughness of biological materials compared to synthetic materials without suc…