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Strain Gradient Plasticity

Submitted by Rashid K. Abu Al-Rub on

Recently, there have been many strain gradient theories that are used for the interpretation of size effect at the micron and submicron length scales. The basic idea of these theories is the introduction of a first, or second (or both) gradients of strain or any internal state variable in the governing equations of classical theories.

iMechanica has just upgraded to Drupal 5. Any issues?

Submitted by Zhigang Suo on

After testing for some time, Lesley Lam has just upgraded iMechanica to Drupal 5.  She has tried to make every function exactly the same as before, so that users should not see any abrupt changes.  If you do find any unfamiliar behavior of the new version, please leave a comment below.

Research Scientist Positions at the Institute of High Performance Computing, Singapore

Submitted by Chun Lu on

The Institute of High Performance Computing (IHPC), a member of the Agency for Science, Technology and Research (A*STAR) in Singapore, invites applications for eight available positions for research scientists in the field of theoretical and computational mechanics and materials science. These positions are connected to the A*STAR-sponsored Visiting Investigator Program (VIP) with Prof. Huajian Gao from Brown University as the Principle Investigator.

The development of Crystal plasticity

Submitted by Xu Zhang on
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Recent experiment have shown the size effect of the materials, when the characteristic length associated with non-uiform plastic deformation is on the scale of micros.The classic plasticity theories can't explain such phenomenon as their constitutive models posses no intrinsic length scale. The new models which contain strain gradient plasticity now are used to explain the experiment.

Community Standards for iMechanica

Submitted by John E. Dolbow on

As a moderator here on iMechanica, I have deleted a few posts recently that were clearly spam. As iMechanica grows and becomes more visible within the mechanics community and the broader internet community, we can expect the frequency of these kinds of posts to increase.

Do-it-yourself iMechanica Get Together

Submitted by Zhigang Suo on
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The classes are over. The summer is coming! Rui Huang, iMechanician Number 22, has just arranged an iMechanica Get Together in an evening at McMat 2007, in Austin. Here is a tentative agenda. Please join us if you are in town.