Search Results - "Karma, A."

Growth competition of columnar dendritic grains: A phase-field study by Tourret, D., Karma, A.

“…We report the results of an extensive phase-field study of the growth competition of columnar dendritic grains in two dimensions. We investigate the influence…”
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Phase field modeling of chemomechanical fracture of intercalation electrodes: Role of charging rate and dimensionality by Mesgarnejad, A., Karma, A.

“…•We investigate the role of flaw size, flux, particle size, and dimensionality.•Power-law governs the activation of flaws over intermediate charging rates.•At…”
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Grain growth competition during thin-sample directional solidification of dendritic microstructures: A phase-field study by Tourret, D., Song, Y., Clarke, A.J., Karma, A.

“…We present the results of a comprehensive phase-field study of columnar grain growth competition in bi-crystalline samples in two dimensions (2D) and in three…”
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Three-dimensional dendritic needle network model for alloy solidification by Tourret, D., Karma, A.

“…We present a three-dimensional (3D) formulation of the multiscale Dendritic Needle Network (DNN) model for dendritic microstructure growth. This approach is…”
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Phase-field models for fatigue crack growth by Mesgarnejad, A., Imanian, A., Karma, A.

“…•First class of phase-field models of fatigue crack growth to reproduce the Paris law.•Yields different Paris law exponents characteristic of brittle and…”
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Coupled motion of asymmetrical tilt grain boundaries: Molecular dynamics and phase field crystal simulations by Trautt, Z.T., Adland, A., Karma, A., Mishin, Y.

“…Previous simulation and experimental studies have shown that some grain boundaries (GBs) can couple to applied shear stresses and be moved by them, producing…”
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Multiscale dendritic needle network model of alloy solidification by Tourret, D., Karma, A.

“…We present a novel dendritic needle network (DNN) model for simulating quantitatively the solidification of dendritic alloys. This approach is intended to…”
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Solidification microstructures and solid-state parallels: Recent developments, future directions by Asta, M., Beckermann, C., Karma, A., Kurz, W., Napolitano, R., Plapp, M., Purdy, G., Rappaz, M., Trivedi, R.

“…Rapid advances in atomistic and phase-field modeling techniques as well as new experiments have led to major progress in solidification science during the…”
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Phase-field formulation for quantitative modeling of alloy solidification by Karma, A

“…A phase-field formulation is introduced to simulate quantitatively microstructural pattern formation in alloys. The thin-interface limit of this formulation…”
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Growth competition between columnar dendritic grains – Cellular automaton versus phase field modeling by Pineau, A., Guillemot, G., Tourret, D., Karma, A., Gandin, Ch.-A.

“…Cellular Automaton (CA) simulations of two-dimensional growth competition among columnar dendritic grains are carried out for a succinonitrile - 0.4 wt%…”
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Microstructure selection in thin-sample directional solidification of an Al-Cu alloy: In situ X-ray imaging and phase-field simulations by Clarke, A.J., Tourret, D., Song, Y., Imhoff, S.D., Gibbs, P.J., Gibbs, J.W., Fezzaa, K., Karma, A.

“…We study microstructure selection during directional solidification of a thin metallic sample. We combine in situ X-ray radiography of a dilute Al-Cu alloy…”
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Spatiotemporal dynamics of oscillatory cellular patterns in three-dimensional directional solidification by Bergeon, N, Tourret, D, Chen, L, Debierre, J-M, Guérin, R, Ramirez, A, Billia, B, Karma, A, Trivedi, R

“…We report results of directional solidification experiments conducted on board the International Space Station and quantitative phase-field modeling of those…”
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Spatiotemporal Organization of Electromechanical Phase Singularities during High-Frequency Cardiac Arrhythmias by Molavi Tabrizi, A., Mesgarnejad, A., Bazzi, M., Luther, S., Christoph, J., Karma, A.

“…Ventricular fibrillation (VF) is a life-threatening electromechanical dysfunction of the heart associated with complex spatiotemporal dynamics of electrical…”
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Thermal-field effects on interface dynamics and microstructure selection during alloy directional solidification by Song, Y., Tourret, D., Mota, F.L., Pereda, J., Billia, B., Bergeon, N., Trivedi, R., Karma, A.

“…We carry out three-dimensional phase-field simulations to model unique experimental observations of cellular and dendritic solidification structures formed…”
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Phase-field simulation of solidification by BOETTINGER, W. J, WARREN, J. A, BECKERMANN, C, KARMA, A

“…▪ Abstract  An overview of the phase-field method for modeling solidification is presented, together with several example results. Using a phase-field variable…”
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The optimal treatment of type II and III odontoid fractures in the elderly: an updated meta-analysis by Huybregts, Jeroen G. J., Barot, Karma A., Recio, Camila, Doucette, Joanne, Mekary, Rania A., Vleggeert-Lankamp, Carmen L. A.

“…Purpose Odontoid fractures are the most common cervical spine fractures in the elderly, with a controversial optimal treatment. The objective of this review…”
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Crystal-melt interfacial free energies in hcp metals: A molecular dynamics study of Mg by Sun, D. Y., Mendelev, M. I., Becker, C. A., Kudin, K., Haxhimali, Tomorr, Asta, M., Hoyt, J. J., Karma, A., Srolovitz, D. J.

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Solidification microstructures: recent developments, future directions by Boettinger, W.J., Coriell, S.R., Greer, A.L., Karma, A., Kurz, W., Rappaz, M., Trivedi, R.

“…The status of solidification science is critically evaluated and future directions of research in this technologically important area are proposed. The most…”
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Modeling Melt Convection in Phase-Field Simulations of Solidification by Beckermann, C, Diepers, H.-J, Steinbach, I, Karma, A, Tong, X

“…A novel diffuse interface model is presented for the direct numerical simulation of microstructure evolution in solidification processes involving convection…”
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Initial dynamics of a solid–liquid interface within a thermal gradient by Xu, M., Fabietti, L.M., Song, Y., Tourret, D., Karma, A., Trivedi, R.

“…In directional solidification experiments an alloy is placed in the thermal gradient assembly and kept stationary to achieve a steady-state thermal profile…”
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