Study of Plastic Shear Localization via the Flow Theory of Mechanism-Based Strain Gradient Plasticity
Publication: Journal of Engineering Mechanics
Volume 135, Issue 3
Abstract
The plastic shear localization is studied via the flow theory of mechanism-based strain gradient plasticity. The shear strain rate displays a rather sharp decrease from the center to the boundary of shear band, and gradually approaches the uniform remote shear strain rate outside the shear band. The shear band thickness obtained analytically is linearly proportional to the (length of) Burgers vector, and also depends on the softening modulus and mesoscale cell size. The maximum shear strain rate in the shear band, however, is sensitive to other material properties such as the ultimate tensile strength and intrinsic material length in strain gradient plasticity.
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Acknowledgments
This research is supported by ONR Composites for Marine Structures Program (Grant No. UNSPECIFIEDN00014-01-1-0205, Program Manager Dr. Y. D. S. Rajapakse). K. C. H. acknowledges the support from the National Basic Research Program of China (973 Program) Grant No. UNSPECIFIED2007CB936803. The support from the NSFC and Ministry of Education of China is also acknowledged.NSFC
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 135 • Issue 3 • March 2009
Pages: 132 - 138
Copyright
© 2009 ASCE.
History
Received: Oct 11, 2007
Accepted: Jan 22, 2008
Published online: Mar 1, 2009
Published in print: Mar 2009
Notes
Note. Associate Editor: George Z. Voyiadjis
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