39 citations · 474 across the 54 of their papers we have counts for
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Compressive Splitting in Brittle Solids: The Inverse of Wrinkling in Sheets
Maryam Khodadad, Francois Barthelat, John D. Clayton +2
Axial splitting is the dominant failure mode of brittle solids under compression, yet its mechanical origin remains unclear. We show that clamped loading platens suppress lateral P…
Nonlocal Linear Instability Drives the Initiation of Motion of Rational and Irrational Twin Interfaces
Chang-Tsan Lu, Anthony Rollett, Kaushik Dayal
Twin boundaries play a central role in the functional behavior of martensitic materials, yet the mechanisms governing the initiation of their motion remain poorly understood for tw…
Stress Asymmetry in Hard Magnetic Soft Materials
H. Gökçen Güner, Francois Barthelat, John D. Clayton +3
Hard magnetic soft materials -- soft polymers embedded with hard magnetic particles -- are modeled using continuum magnetomechanical formulations in which the deformation and the m…
A Kinetic Phase-Field Model of Diffusion Bonding: A Nonlocal Approach to Interface Coalescence
Maryam Khodadad, Noel Walkington, Suresh Kalyanam +2
Conventional phase-field models often drive solid-solid interfaces to coalesce when in close proximity. This feature limits their use for processes like diffusion bonding, where th…
Two-Scale Analysis of the Electrostatics of Dielectric Crystals: Emergence of Polarization Density and Boundary Charges
Shoham Sen, Yang Wang, Timothy Breitzman +1
Ionic crystals, such as solid electrolytes and complex oxides, are central to modern technologies for energy storage, sensing, actuation, and other functional applications. An impo…
Crack Face Contact Modeling is Essential to Predict Crack-Parallel Stresses
Maryam Hakimzadeh, Noel Walkington, Carlos Mora-Corral +2
Phase-field fracture models provide a powerful approach to modeling fracture, potentially enabling the unguided prediction of crack growth in complex patterns. To ensure that only…
Phase-Field Modeling of Fracture under Compression and Confinement in Anisotropic Geomaterials
Maryam Hakimzadeh, Carlos Mora-Corral, Noel Walkington +2
Strongly anisotropic geomaterials undergo fracture under compressive loading. This paper applies a phase-field fracture model to study this fracture process. While phase-field frac…
Impact of grain boundary energy anisotropy on grain growth
S. Kiana Naghibzadeh, Zipeng Xu, David Kinderlehrer +3
A threshold dynamics model of grain growth that accounts for the anisotropy in the grain boundary energy has been used to simulate experimentally observed grain growth of polycryst…
Interplay between Nucleation and Kinetics in Dynamic Twinning
Janel Chua, Vaibhav Agrawal, Noel Walkington +2
In this work, we apply a phase-field modeling framework to elucidate the interplay between nucleation and kinetics in the dynamic evolution of twinning interfaces. The key feature…
Grain boundary migration in polycrystalline -Fe
Zipeng Xu, Yu-Feng Shen, S. Kiana Naghibzadeh +8
High energy x-ray diffraction microscopy was used to image the microstructure of -Fe before and after a 600 C anneal. These data were used to determine the areas, curvat…
Comparison of simulated and measured grain volume changes during grain growth
Xiaoyao Peng, Aditi Bhattacharya, S. Kiana Naghibzadeh +4
The three-dimensional microstructure of Ni, observed after five annealing intervals, was compared to simulations of grain growth using the threshold dynamics method with the assump…
A 3D phase field dislocation dynamics model for body-centered cubic crystals
Xiaoyao Peng, Nithin Mathew, Irene J. Beyerlein +2
In this work, we present a 3D Phase Field Dislocation Dynamics (PFDD) model for body-centered cubic (BCC) metals. The model formulation is extended to account for the dependence of…
A Dynamic Multiscale Phase-field Model for Structural Transformations and Twinning: Regularized Interfaces with Transparent Prescription of Complex Kinetics and Nucleation
Vaibhav Agrawal, Kaushik Dayal
The motion of microstructural interfaces is important in modeling materials that undergo twinning and structural phase transformations. Continuum models fall into two classes: shar…
Anomalous phonon behavior of carbon nanotubes: First-order influence of external load
Amin Aghaei, Kaushik Dayal, Ryan S. Elliott
External loads typically have a indirect influence on phonon curves, i.e., they influence the phonon curves by changing the state about which linearization is performed. In this pa…
Symmetry-Adapted Phonon Analysis of Nanotubes
Amin Aghaei, Kaushik Dayal, Ryan S. Elliott
The characteristics of phonons, i.e. linearized normal modes of vibration, provide important insights into many aspects of crystals, e.g. stability and thermodynamics. In this pape…