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Necking of anisotropic micro-films with strain-gradient effects

Necking of anisotropic micro-films with strain-gradient effects Abstract Necking of stubby micro-films of aluminum is investigated numerically by considering tension of a specimen with an initial imperfection used to onset localisation. Plastic anisotropy is represented by two different yield criteria and strain-gradient effects are accounted for using the visco-plastic finite strain model. Furthermore, the model is extended to isotropic anisotropic hardening (evolving anisotropy). For isotropic hardening plastic anisotropy affects the predicted overall nominal stress level, while the peak stress remains at an overall logarithmic strain corresponding to the hardening exponent. This holds true for both local and nonlocal materials. Anisotropic hardening delays the point of maximum overall nominal stress. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Acta Mechanica Sinica" Springer Journals

Necking of anisotropic micro-films with strain-gradient effects

"Acta Mechanica Sinica" , Volume 24 (5): 11 – Oct 1, 2008

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References (53)

Publisher
Springer Journals
Copyright
2008 The Chinese Society of Theoretical and Applied Mechanics and Springer-Verlag GmbH
ISSN
0567-7718
eISSN
1614-3116
DOI
10.1007/s10409-008-0186-6
Publisher site
See Article on Publisher Site

Abstract

Abstract Necking of stubby micro-films of aluminum is investigated numerically by considering tension of a specimen with an initial imperfection used to onset localisation. Plastic anisotropy is represented by two different yield criteria and strain-gradient effects are accounted for using the visco-plastic finite strain model. Furthermore, the model is extended to isotropic anisotropic hardening (evolving anisotropy). For isotropic hardening plastic anisotropy affects the predicted overall nominal stress level, while the peak stress remains at an overall logarithmic strain corresponding to the hardening exponent. This holds true for both local and nonlocal materials. Anisotropic hardening delays the point of maximum overall nominal stress.

Journal

"Acta Mechanica Sinica"Springer Journals

Published: Oct 1, 2008

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