Multiscale Modeling of Nanocrystalline Metals based on Competing Grain Boundary and Grain Interior Deformation Mechanisms



Multiscale Modeling of Nanocrystalline Materials: A Variational Approach
Birkle, Manuel; Gürses, Ercan; Miehe, Christian (2011-04-21)
This paper presents a variational multi-scale constitutive model in the finite deformation regime capable of capturing themechanical behavior o f nanocrystalline (nc) fcc metals. The nc-material is modeled as a two-phase material consistin g of agrain interior (GI) phase and a grain boundary (GB) phase. A rate-independent isotropic porous plasticity model is employedto describe the GB p hase, whereas a cryst al - plasticity model which accounts for t he transition from partial disl ocation to fulldislocation...
Multiscale Modeling of High Energetic Materials under Impact Loads
Rımolı, Julıan; Gürses, Ercan; Ortız, Mıchael (2009-07-19)
Multiscale Modeling of Thin-Wire Coupling Problems Using Hybridization of Finite Element and Dipole Moment Methods and GPU Acceleration
ÖZGÜN, ÖZLEM; Mittra, Raj; Kuzuoğlu, Mustafa (2020-01-01)
In this article, a hybrid numerical method, called finite element method (FEM) + dipole moment (DM), is presented for efficient solution of multiscale electromagnetic radiation and scattering problems that involve structures with fine features, such as thin-wire antennas or objects. In this method, the FEM is hybridized with the DM approach to help ease certain computational burdens, such as mesh refinement, ill-conditioning, memory overload, and long computation times, when solving multiscale problems with...
Multiscale analysis of solids flux signals measured in a high density circulating fluidized bed using wavelet transformation
Külah, Görkem (2005-05-13)
In order characterize the annulus thickness in a high density circulating fluidized bed, local instantaneous solids fluxes are measured using a three-fibre optical probe in a 0.20 m diameter, 5.9 m tall CFB riser operating at superficial gas velocity of 6 m/s and solids circulation flux of 330 kg/m(2)s, with FCC particles of mean diameter 70 mu m and density 1700 kg/m(3) as the bed material. Measurements obtained at three axial levels (z = 0.76, 1.27, 3.10 m) and six radial locations (r/R = 0.94, 0.88, 0.75...
Multiscale Modeling of the Morphology and Properties of Segmented Silicone-Urea Copolymers
Yıldırım, Erol; Yurtsever, Ersin; Yilgor, Iskender; Yilgor, Emel (Springer Science and Business Media LLC, 2011-9-9)
Molecular dynamics and mesoscale dynamics simulation techniques were used to investigate the effect of hydrogen bonding on the microphase separation, morphology and various physicochemical properties of segmented silicone-urea copolymers. Model silicone-urea copolymers investigated were based on the stoichiometric combinations of alpha,omega-aminopropyl terminated polydimethylsiloxane (PDMS) oligomers with number average molecular weights ranging from 700 to 15,000 g/mole and bis(4-isocyanatocyclohexyl)meth...
Citation Formats
E. Gürses, “Multiscale Modeling of Nanocrystalline Metals based on Competing Grain Boundary and Grain Interior Deformation Mechanisms,” 2012, Accessed: 00, 2021. [Online]. Available: