Show/Hide Menu
Hide/Show Apps
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Open Science Policy
Open Science Policy
Open Access Guideline
Open Access Guideline
Postgraduate Thesis Guideline
Postgraduate Thesis Guideline
Communities & Collections
Communities & Collections
Help
Help
Frequently Asked Questions
Frequently Asked Questions
Guides
Guides
Thesis submission
Thesis submission
MS without thesis term project submission
MS without thesis term project submission
Publication submission with DOI
Publication submission with DOI
Publication submission
Publication submission
Supporting Information
Supporting Information
General Information
General Information
Copyright, Embargo and License
Copyright, Embargo and License
Contact us
Contact us
Multiscale Modeling of Nanocrystalline Materials: A Variational Approach
Date
2011-04-21
Author
Birkle, Manuel
Gürses, Ercan
Miehe, Christian
Metadata
Show full item record
Item Usage Stats
110
views
0
downloads
Cite This
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 mediated plasticity is employed for the GI phase. Assuming th e rule of mixtures, t he overall behavior of a givengrain is obtained via volume averaging. The scale transition from a single grain to a polycrystal is achieved by Taylor-typehomogenization. It is shown that the proposed model is able to capture the inverse Hall-Petch effect.
URI
https://onlinelibrary.wiley.com/doi/epdf/10.1002/pamm.201110247
https://hdl.handle.net/11511/76048
DOI
https://doi.org/10.1002/pamm.201110247
Conference Name
82nd Annual Meeting of Gesellschaft für Angewandte Mathematik und Mechanik (GAMM), (18 - 21 April 2011)
Collections
Department of Aerospace Engineering, Conference / Seminar
Suggestions
OpenMETU
Core
Performance analysis of adaptive loading OFDM under Rayleigh fading
Canpolat, B; Tanik, Y (Institute of Electrical and Electronics Engineers (IEEE), 2004-07-01)
In this paper, we investigate the performance of adaptive loading orthogonal frequency-division multiplexing (OFDM) under Rayleigh fading with maximal ratio-combining (MRC) diversity at the receiver. We assume that channel-state information is available at both the transmitter and the receiver. Closed-form expressions for the lower bound on the average capacity of OFDM transmission under Rayleigh fading are provided for ideal MRC diversity. Simple approximate expressions for the average capacity of the Rayl...
Scalar mesons in radiative phi-meson decays into neutral k-meson states
Korkmaz (Şişman), Canan; Yılmaz, Osman; Department of Physics (2006)
Radiative Decays of the phi-meson to the scalar mesons f0(980) and a0(980) are investigated within the framework of charged kaon loop model for both point-like scalar mesons and for scalar mesons with extended structure. Then, the radiative phi-meson decay into neutral K-meson is studied via a two step mechanism in which the scalar mesons couple the final state to the phi-meson through the charged kaon loop. The branching ratio of this decay is calculated and it is shown that this reaction will not provide ...
A variational multiscale constitutive model for nanocrystalline materials
Gürses, Ercan (Elsevier BV, 2011-03-01)
This paper presents a variational multi-scale constitutive model in the finite deformation regime capable of capturing the mechanical behavior of nanocrystalline (nc) fcc metals. The nc-material is modeled as a two-phase material consisting of a grain interior phase and a grain boundary effected zone (GBAZ). A rate-independent isotropic porous plasticity model is employed to describe the GBAZ, whereas a crystal-plasticity model which accounts for the transition from partial dislocation to full dislocation m...
Parametric and posterior Cramér-Rao lower bounds for extended target tracking in a random matrix framework
Sarıtaş, Elif; Orguner, Umut; Department of Electrical and Electronics Engineering (2015)
This thesis presents the parametric and posterior Cramér-Rao lower bounds (CRLB) for extended target tracking (ETT) in a random matrix framework. ETT is an area of target tracking in which the common assumption of point targets does not hold due to the recent improvements in sensor technology. With the increased sensor capability, targets can generate more than one measurement in a single scan depending on their size. Therefore, not only the target’s kinematical state but also its extension can be estimated...
QUALITY EVALUATION OF STEREOSCOPIC VIDEOS USING DEPTH MAP SEGMENTATION
Sarikan, Selim S.; Olgun, Ramazan F.; Akar, Gözde (2011-09-09)
This paper presents a new quality evaluation model for stereoscopic videos using depth map segmentation. This study includes both objective and subjective evaluation. The goal of this study is to understand the effect of different depth levels on the overall 3D quality. Test sequences with different coding schemes are used. The results show that overall quality has a strong correlation with the quality of the background, where disparity is smaller relative to the foreground. The results also showed that con...
Citation Formats
IEEE
ACM
APA
CHICAGO
MLA
BibTeX
M. Birkle, E. Gürses, and C. Miehe, “Multiscale Modeling of Nanocrystalline Materials: A Variational Approach,” Graz, Avusturya, 2011, vol. 11, Accessed: 00, 2021. [Online]. Available: https://onlinelibrary.wiley.com/doi/epdf/10.1002/pamm.201110247.
