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Naslov:Fast Fourier transform approach to strain gradient crystal plasticity : regularization of strain localization and size effect
Avtorji:ID Lame Jouybari, Amirhossein, Institut "Jožef Stefan" (Avtor)
ID El Shawish, Samir, Institut "Jožef Stefan" (Avtor)
ID Cizelj, Leon, Institut "Jožef Stefan" (Avtor)
Datoteke:URL URL - Izvorni URL, za dostop obiščite https://www.sciencedirect.com/science/article/pii/S0749641924002808?via%3Dihub
 
.pdf PDF - Predstavitvena datoteka, prenos (9,87 MB)
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Jezik:Angleški jezik
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:Logo IJS - Institut Jožef Stefan
Povzetek:The Strain Gradient Crystal Plasticity (SGCP), based on cumulative shear strain, is developed to regularize and simulate the size effect behavior of polycrystalline aggregates, specifically in the formation of localization bands in terms of slip and kink bands, influenced by strain softening during the initial stages of plastic deformation. In this respect, the thermodynamically consistent derivation of the SGCP equations is presented, establishing their connection to the kinematics of classical crystal plasticity (CCP) framework. The governing balance equations are solved using the fixed-point algorithm of the fast Fourier transform (FFT)-homogenization method, involving explicit coupling between the classical and SGCP balance equations. To address this problem, a strong 21-voxel finite difference scheme is established. This scheme is considered to solve the higher order balance equation inherent to SGCP. Additionally, three types of interface conditions are implemented to explore the impact of grain boundaries on the transmission of localization bands. These conditions yield consistent intragranular/transgranular localization patterns in the MicroFree and MicroContinuity cases, while in the MicroHard condition all localization bands are intragranular with stress concentrations appearing at the grain boundaries. Analytical solutions corresponding to different material behaviors are developed and compared with numerical results to validate the numerical implementation of the FFT fixed-point algorithm. It is observed that both the macroscopic behavior and microscopic variables in CCP framework are highly influenced by grid resolutions (non-objective), leading to numerical instabilities arising from the material softening and subsequent formation of localization bands, both in single crystals and polycrystalline aggregates. Remarkably, the developed SGCP model provides results that are independent of grid resolutions (objective) and effectively regularizes the material behavior on local scale. Moreover, the non-local parameter of the model is capable of controlling the localization band widths. Finally, the proposed SGCP model, together with employed MicroHard condition on grain boundaries, is demonstrated to qualitatively reproduce main microstructural features of irradiated polycrystalline materials.
Ključne besede:strain localization A, strain gradient crystal plasticity B, polycrystalline material B, FFT-homogenization method C
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Poslano v recenzijo:14.03.2024
Datum objave:29.10.2024
Založnik:Elsevier
Leto izida:2024
Št. strani:str. 1-32
Številčenje:Vol. 183, [article no.] 104153
Izvor:Nizozemska
PID:20.500.12556/DiRROS-21936 Novo okno
UDK:53
ISSN pri članku:1879-2154
DOI:10.1016/j.ijplas.2024.104153 Novo okno
COBISS.SI-ID:213736707 Novo okno
Avtorske pravice:© 2024 The Authors.
Opomba:Nasl. z nasl. zaslona; Opis vira z dne 11. 11. 2024;
Datum objave v DiRROS:11.04.2025
Število ogledov:97
Število prenosov:50
Metapodatki:XML DC-XML DC-RDF
:
LAME JOUYBARI, Amirhossein, EL SHAWISH, Samir in CIZELJ, Leon, 2024, Fast Fourier transform approach to strain gradient crystal plasticity : regularization of strain localization and size effect. International journal of plasticity [na spletu]. 2024. Vol. 183,  104153, p. 1–32. [Dostopano 21 april 2025]. DOI 10.1016/j.ijplas.2024.104153. Pridobljeno s: https://dirros.openscience.si/IzpisGradiva.php?lang=slv&id=21936
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Gradivo je del revije

Naslov:International journal of plasticity
Založnik:Elsevier Sciense
ISSN:1879-2154
COBISS.SI-ID:175283203 Novo okno

Gradivo je financirano iz projekta

Financer:ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Številka projekta:P2-0026
Naslov:Reaktorska tehnika
Financer:ARIS - Javna agencija za znanstvenoraziskovalno in inovacijsko dejavnost Republike Slovenije
Program financ.:Young researcher grants

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:29.10.2024
Vezano na:VoR

Sekundarni jezik

Jezik:Slovenski jezik
Naslov:Fast Fourier transform approach to strain gradient crystal plasticity: regularization of strain localization and size effect
Ključne besede:plastičnost kristalnega gradienta B, lokalizacija seva, FFT-homogenizacijska metoda C, klasična kristalna plastičnost, Fourierjeva transformacija


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