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Multi-Scale Computational Modeling of Two-Phased Metal Using GMC MethodA multi-scale computational model for determining plastic behavior in two-phased CMSX-4 Ni-based superalloys is developed on a finite element analysis (FEA) framework employing crystal plasticity constitutive model that can capture the microstructural scale stress field. The generalized method of cells (GMC) micromechanics model is used for homogenizing the local field quantities. At first, GMC as stand-alone is validated by analyzing a repeating unit cell (RUC) as a two-phased sample with 72.9% volume fraction of gamma'-precipitate in the gamma-matrix phase and comparing the results with those predicted by finite element analysis (FEA) models incorporating the same crystal plasticity constitutive model. The global stress-strain behavior and the local field quantity distributions predicted by GMC demonstrated good agreement with FEA. High computational saving, at the expense of some accuracy in the components of local tensor field quantities, was obtained with GMC. Finally, the capability of the developed multi-scale model linking FEA and GMC to solve real life sized structures is demonstrated by analyzing an engine disc component and determining the microstructural scale details of the field quantities.
Document ID
20140016761
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Moghaddam, Masoud Ghorbani (Clarkson Univ. Potsdam, NY, United States)
Achuthan, A. (Clarkson Univ. Potsdam, NY, United States)
Bednacyk, B. A. (NASA Glenn Research Center Cleveland, OH, United States)
Arnold, S. M. (NASA Glenn Research Center Cleveland, OH, United States)
Pineda, E. J. (NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
November 26, 2014
Publication Date
January 13, 2014
Subject Category
Structural Mechanics
Metals And Metallic Materials
Report/Patent Number
GRC-E-DAA-TN12482
Meeting Information
Meeting: SciTech2014
Location: National Harbor, MD
Country: United States
Start Date: January 13, 2014
End Date: January 17, 2014
Sponsors: American Inst. of Aeronautics and Astronautics
Funding Number(s)
WBS: WBS 794072.02.03.03.02.01
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
nickel alloys
plastic deformation
multiscale models

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