A multiscale phenomenological constitutive model for strain rate dependent tensile ductility in nanocrystalline metals

M. Amir Siddiq; Tamer El Sayed

doi:10.1016/j.matlet.2014.11.112

A multiscale phenomenological constitutive model for strain rate dependent tensile ductility in nanocrystalline metals

M. Amir Siddiq^*, Tamer El Sayed

^*Corresponding author for this work

Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

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Abstract

A variational multiscale constitutive model that accounts for strain rate dependent ductility of nanocrystalline materials during intergranular failure has been presented. The presented model is an extension of the previous work [1], in which a nanocrystalline material is modelled as two-phase with grain interior being modelled using crystal plasticity theory while grain boundary affected zone using porous plasticity model which accounts for ductile damage due to void growth and coalescence. The model capability of capturing the strain rate dependent deformation and failure has been demonstrated through validations against uniaxial test data taken from literature. The validated results show a good agreement between experimental and simulated response.

Original language	English
Pages (from-to)	60-63
Number of pages	4
Journal	Materials Letters
Volume	142
Early online date	29 Nov 2014
DOIs	https://doi.org/10.1016/j.matlet.2014.11.112
Publication status	Published - 1 Mar 2015

Bibliographical note

Acknowledgments
No external funding was received for this project.

Keywords

Crystal plasticity theory
Intergranular failure
Nanocrystalline materials
Strain rate sensitivity
Variational updates

Access to Document

10.1016/j.matlet.2014.11.112

NC_RateSENS_Paper
NOTICE: this is the author’s version of a work that was accepted for publication in Materials Letters. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in MATERIALS LETTERS VOL 142, (2015) DOI: 10.1016/j.matlet.2014.11.112
Accepted author manuscript, 1.03 MB

Cite this

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title = "A multiscale phenomenological constitutive model for strain rate dependent tensile ductility in nanocrystalline metals",

abstract = "A variational multiscale constitutive model that accounts for strain rate dependent ductility of nanocrystalline materials during intergranular failure has been presented. The presented model is an extension of the previous work [1], in which a nanocrystalline material is modelled as two-phase with grain interior being modelled using crystal plasticity theory while grain boundary affected zone using porous plasticity model which accounts for ductile damage due to void growth and coalescence. The model capability of capturing the strain rate dependent deformation and failure has been demonstrated through validations against uniaxial test data taken from literature. The validated results show a good agreement between experimental and simulated response.",

keywords = "Crystal plasticity theory, Intergranular failure, Nanocrystalline materials, Strain rate sensitivity, Variational updates",

author = "Siddiq, {M. Amir} and {El Sayed}, Tamer",

note = "Acknowledgments No external funding was received for this project.",

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AU - Siddiq, M. Amir

AU - El Sayed, Tamer

N1 - Acknowledgments No external funding was received for this project.

PY - 2015/3/1

Y1 - 2015/3/1

N2 - A variational multiscale constitutive model that accounts for strain rate dependent ductility of nanocrystalline materials during intergranular failure has been presented. The presented model is an extension of the previous work [1], in which a nanocrystalline material is modelled as two-phase with grain interior being modelled using crystal plasticity theory while grain boundary affected zone using porous plasticity model which accounts for ductile damage due to void growth and coalescence. The model capability of capturing the strain rate dependent deformation and failure has been demonstrated through validations against uniaxial test data taken from literature. The validated results show a good agreement between experimental and simulated response.

AB - A variational multiscale constitutive model that accounts for strain rate dependent ductility of nanocrystalline materials during intergranular failure has been presented. The presented model is an extension of the previous work [1], in which a nanocrystalline material is modelled as two-phase with grain interior being modelled using crystal plasticity theory while grain boundary affected zone using porous plasticity model which accounts for ductile damage due to void growth and coalescence. The model capability of capturing the strain rate dependent deformation and failure has been demonstrated through validations against uniaxial test data taken from literature. The validated results show a good agreement between experimental and simulated response.

KW - Crystal plasticity theory

KW - Intergranular failure

KW - Nanocrystalline materials

KW - Strain rate sensitivity

KW - Variational updates

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DO - 10.1016/j.matlet.2014.11.112

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VL - 142

SP - 60

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JO - Materials Letters

JF - Materials Letters

ER -

A multiscale phenomenological constitutive model for strain rate dependent tensile ductility in nanocrystalline metals

Abstract

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M. Amir Siddiq

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A multiscale phenomenological constitutive model for strain rate dependent tensile ductility in nanocrystalline metals

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Bibliographical note

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M. Amir Siddiq

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