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https://hdl.handle.net/11147/11471
Title: | Misorientation and Grain Boundary Orientation Dependent Grain Boundary Response in Polycrystalline Plasticity | Authors: | Yalçınkaya, Tuncay Özdemir, İzzet Tandoğan, İzzet Tarık |
Keywords: | Strain gradient plasticity Microforming Size effect Grain boundary Crystal plasticity |
Publisher: | Springer | Abstract: | This paper studies the evolution of intergranular localization and stress concentration in three dimensional micron sized specimens through the Gurtin grain boundary model (J Mech Phys Solids 56:640-662, 2008) incorporated into a three dimensional higher-order strain gradient crystal plasticity framework (Yalcinkaya et al. in Int J Solids Struct 49:2625-2636, 2012). The study addresses continuum scale dislocation-grain boundary interactions where the effect of crystal orientation mismatch and grain boundary orientation are taken into account through the grain boundary model in polycrystalline metallic specimens. Due to the higher-order nature of the model, a mixed finite element formulation is used to discretize the problem in which both displacements and plastic slips are considered as primary variables. For the treatment of grain boundaries within the solution algorithm, an interface element is formulated and implemented together with the bulk plasticity model. The capabilities of the framework is demonstrated through 3D polycrystalline examples considering grain boundary conditions, grain boundary strength, the orientation distribution and the specimen size. A detailed grain boundary condition and stress concentration analysis is presented. The advantages and the disadvantages of the model is discussed in detail through numerical examples. | URI: | https://doi.org/10.1007/s00466-021-01972-z https://hdl.handle.net/11147/11471 |
ISSN: | 0178-7675 1432-0924 |
Appears in Collections: | Civil Engineering / İnşaat Mühendisliği Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection |
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Yalçinkaya2021_Article.pdf | 5.03 MB | Adobe PDF | View/Open |
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