Prediction of void growth using gradient enhanced polycrystal plasticity

Emin Semih Perdahcioglu; Emin Erkan Asik; A. H. Van Den Boogaard

doi:10.1063/1.5112754

Prediction of void growth using gradient enhanced polycrystal plasticity

Emin Semih Perdahcioglu^*, Emin Erkan Asik, A. H. Van Den Boogaard

^*Corresponding author for this work

Nonlinear Solid Mechanics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

1 Citation (Scopus)

Abstract

The growth of existing voids in the microstructure is governed by the localized plastic deformation around their boundaries. These voids are initially around an order of magnitude smaller than the grain size of common metallic materials. Consequently, the plastic deformation around the void can be reasonably well approximated by the crystal plasticity finite modeling approach. On the other hand, due to the intrinsic size scales involved, the gradient of the plastic strain will be very large which is known to result in generation of significant amounts of Geometrically Necessary Dislocations. These have a direct influence on the governing equations of plasticity and hence the growth process. Therefore, the proposed approach takes into account hardening based on dislocation densities which include the GNDs as a source of dislocations. The generation of GNDs is modeled using a gradient enhancement in the finite element simulation. The growth of voids are qualitatively compared to experimental results found in the literature.

Original language	English
Title of host publication	Proceedings of the 22nd International ESAFORM Conference on Material Forming, ESAFORM 2019
Editors	Pedro Arrazola, Eneko Saenz de Argandona, Nagore Otegi, Joseba Mendiguren, Mikel Saez de Buruaga, Aitor Madariaga, Lander Galdos
Publisher	American Institute of Physics
ISBN (Electronic)	9780735418479
DOIs	https://doi.org/10.1063/1.5112754
Publication status	Published - 2 Jul 2019
Event	22nd International Conference on Material Forming 2019 - Votoria-Gasteiz, Spain Duration: 8 May 2019 → 10 May 2019 Conference number: 22 https://esaform2019.mondragon.edu/en/home

Publication series

Name	AIP Conference Proceedings
Volume	2113
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	22nd International Conference on Material Forming 2019
Abbreviated title	ESAFORM 2019
Country/Territory	Spain
City	Votoria-Gasteiz
Period	8/05/19 → 10/05/19
Internet address	https://esaform2019.mondragon.edu/en/home

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10.1063/1.5112754

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Perdahcioglu, E. S., Asik, E. E., & Van Den Boogaard, A. H. (2019). Prediction of void growth using gradient enhanced polycrystal plasticity. In P. Arrazola, E. Saenz de Argandona, N. Otegi, J. Mendiguren, M. Saez de Buruaga, A. Madariaga, & L. Galdos (Eds.), Proceedings of the 22nd International ESAFORM Conference on Material Forming, ESAFORM 2019 [180016] (AIP Conference Proceedings; Vol. 2113). American Institute of Physics. https://doi.org/10.1063/1.5112754

Perdahcioglu, Emin Semih ; Asik, Emin Erkan ; Van Den Boogaard, A. H. / Prediction of void growth using gradient enhanced polycrystal plasticity. Proceedings of the 22nd International ESAFORM Conference on Material Forming, ESAFORM 2019. editor / Pedro Arrazola ; Eneko Saenz de Argandona ; Nagore Otegi ; Joseba Mendiguren ; Mikel Saez de Buruaga ; Aitor Madariaga ; Lander Galdos. American Institute of Physics, 2019. (AIP Conference Proceedings).

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title = "Prediction of void growth using gradient enhanced polycrystal plasticity",

abstract = "The growth of existing voids in the microstructure is governed by the localized plastic deformation around their boundaries. These voids are initially around an order of magnitude smaller than the grain size of common metallic materials. Consequently, the plastic deformation around the void can be reasonably well approximated by the crystal plasticity finite modeling approach. On the other hand, due to the intrinsic size scales involved, the gradient of the plastic strain will be very large which is known to result in generation of significant amounts of Geometrically Necessary Dislocations. These have a direct influence on the governing equations of plasticity and hence the growth process. Therefore, the proposed approach takes into account hardening based on dislocation densities which include the GNDs as a source of dislocations. The generation of GNDs is modeled using a gradient enhancement in the finite element simulation. The growth of voids are qualitatively compared to experimental results found in the literature.",

author = "Perdahcioglu, {Emin Semih} and Asik, {Emin Erkan} and {Van Den Boogaard}, {A. H.}",

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booktitle = "Proceedings of the 22nd International ESAFORM Conference on Material Forming, ESAFORM 2019",

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Perdahcioglu, ES, Asik, EE & Van Den Boogaard, AH 2019, Prediction of void growth using gradient enhanced polycrystal plasticity. in P Arrazola, E Saenz de Argandona, N Otegi, J Mendiguren, M Saez de Buruaga, A Madariaga & L Galdos (eds), Proceedings of the 22nd International ESAFORM Conference on Material Forming, ESAFORM 2019., 180016, AIP Conference Proceedings, vol. 2113, American Institute of Physics, 22nd International Conference on Material Forming 2019, Votoria-Gasteiz, Spain, 8/05/19. https://doi.org/10.1063/1.5112754

Prediction of void growth using gradient enhanced polycrystal plasticity. / Perdahcioglu, Emin Semih; Asik, Emin Erkan; Van Den Boogaard, A. H.

Proceedings of the 22nd International ESAFORM Conference on Material Forming, ESAFORM 2019. ed. / Pedro Arrazola; Eneko Saenz de Argandona; Nagore Otegi; Joseba Mendiguren; Mikel Saez de Buruaga; Aitor Madariaga; Lander Galdos. American Institute of Physics, 2019. 180016 (AIP Conference Proceedings; Vol. 2113).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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AU - Asik, Emin Erkan

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N2 - The growth of existing voids in the microstructure is governed by the localized plastic deformation around their boundaries. These voids are initially around an order of magnitude smaller than the grain size of common metallic materials. Consequently, the plastic deformation around the void can be reasonably well approximated by the crystal plasticity finite modeling approach. On the other hand, due to the intrinsic size scales involved, the gradient of the plastic strain will be very large which is known to result in generation of significant amounts of Geometrically Necessary Dislocations. These have a direct influence on the governing equations of plasticity and hence the growth process. Therefore, the proposed approach takes into account hardening based on dislocation densities which include the GNDs as a source of dislocations. The generation of GNDs is modeled using a gradient enhancement in the finite element simulation. The growth of voids are qualitatively compared to experimental results found in the literature.

AB - The growth of existing voids in the microstructure is governed by the localized plastic deformation around their boundaries. These voids are initially around an order of magnitude smaller than the grain size of common metallic materials. Consequently, the plastic deformation around the void can be reasonably well approximated by the crystal plasticity finite modeling approach. On the other hand, due to the intrinsic size scales involved, the gradient of the plastic strain will be very large which is known to result in generation of significant amounts of Geometrically Necessary Dislocations. These have a direct influence on the governing equations of plasticity and hence the growth process. Therefore, the proposed approach takes into account hardening based on dislocation densities which include the GNDs as a source of dislocations. The generation of GNDs is modeled using a gradient enhancement in the finite element simulation. The growth of voids are qualitatively compared to experimental results found in the literature.

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Perdahcioglu ES, Asik EE, Van Den Boogaard AH. Prediction of void growth using gradient enhanced polycrystal plasticity. In Arrazola P, Saenz de Argandona E, Otegi N, Mendiguren J, Saez de Buruaga M, Madariaga A, Galdos L, editors, Proceedings of the 22nd International ESAFORM Conference on Material Forming, ESAFORM 2019. American Institute of Physics. 2019. 180016. (AIP Conference Proceedings). doi: 10.1063/1.5112754

Prediction of void growth using gradient enhanced polycrystal plasticity

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