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How to deal with the constitutive integration in plasticity?

Submitted by Bin Ji on
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Plastic theory has been developed systematically. As a beginner, however, some questions have confused me for a long time.

As is well known, the constitutive integration must be deal with in the flow theory. Instead of the explicit algorithm such as M-iteration, the implicit one - stress update algorithm - has been attractive for its simplicity, the most famous of which is rp (return mapping) for J2 flow theory.

Graduate Student or Graduate Employee?

Submitted by Amit.Ranade on
research
philosophy
schooling

Lately I have been thinking that "Graduate Student" is a misnomer. The correct title should be "Graduate Research Assistant" or "Graduate Engineer".  After more than a year spent in industry, I think that there really is no difference in the work done. Except that the work environment is more flexible in academia. 

The 2nd International Conference on Advanced Computational Engineering and Experimenting, ACE-X2008

Submitted by Yong Zhu on
conference
experiment
computation

The 2nd International Conference on Advanced Computational Engineering and Experimenting, ACE-X2008

Barcelona, Spain, July 14-15, 2008.



For more information, please check the ACE-X2008 website www.ace-x2008.com <http://www.ace-x2008.com/&gt;

Fabrication and Characterization of Patterned Single-Crystal Silicon Nanolines

Submitted by Minkyoo Kang on
research
fracture
buckling
R. Huang Group Research
nanomaterials
nanoindentation
friction
nanostructures


B. Li, M. K. Kang, K. Lu, R. Huang, P. S. Ho, R. A. Allen, and M. W. Cresswell, Nano Letters 8, 92 -98 (2008). (Web Release Date: 07-Dec-2007; DOI: 10.1021/nl072144i)

 

Kindle - The Future of Ink, part 2

Submitted by Michael H. Suo on
industry
large area electronics
display
industry

A year ago in my first post, The Future of Ink, I explored e-ink technology and the e-book concept when the potential was still largely unseen. But since then, the industry has completely transformed, and the prospect of the e-book is beginning to be realized.

Wing Kam Liu won the 2007 Robert Henry Thurston Lecture Award

Submitted by Anonymous (not verified) on
mechanician
asme
awards

At the 2007 ASME Congress, in Seattle, Professor Wing Kam Liu won the 2007 Robert Henry Thurston Lecture Award.  Wing Kam was a past chair of the Applied Mechanics Division, and has made seminal contributions in the field of computational mechanics.

stable elements for mixed elasticity

Submitted by Alessio on
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fem elasticity

I'm very interested in the choice of the finite element spaces for elasticity. I want to choose elements for the stress and the velocity, I was suggested to use piecewise constant for the stress and piecewise linear for the velocities to satisfy the Babuska-Brezzi condition. Is that right? I've heard that I can't use only 6 components for the stress in this way, but I must add some additional constraint to enforce its simmetry. I'm looking for additional documentation, but I can't find any. Has someone got any suggestion? Thanks.

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