We present a geometric theory of nonlinear solids with distributed dislocations. In this theory the material manifold - where the body is stress free - is a Weitzenbock manifold, i.e. a manifold with a flat affine connection with torsion but vanishing non-metricity. Torsion of the material manifold is identified with the dislocation density tensor of nonlinear dislocation mechanics. Using Cartan's moving frames we construct the material manifold for several examples of bodies with distributed dislocations. We also present non-trivial examples of zero-stress dislocation distributions.

ACS Nano, DOI: 10.1021/nn204476h

There is an immediate opening for a postdoctoral research position in the Advanced Computational Research Lab at RPI, Troy NY to work on Crystal Plasticity Finite Element Methods. Currently we are working on interesting advances in the areas of radiation damage and high strain rate loading conditions. Encouraged to apply are creative, self-motivated individuals with a sound baclkground in computational mechanics, CPFEM and materials science. RPI is home to the CCNI, one of the most powerful university-based supercomputational research facilities in the world.

I have formulated a shear-lag model for calculating the variation of stress along carbon nanohorns (CNHs), which are conical shaped wrapped carbon sheets, embedded in an epoxy matrix under axial loading.  I found that the stress distribution along the length of CNHs depends on the cone angle of these structures and maximum normal axial stress has a smaller value in CNHs compared to a carbon nanotube (CNT) with same cross-section as of the CNH's tip.  Furthermore, I read an article stating that synthesis of CNHs are easier compared to CNTs.  However, the only article I could f

Dear Colleague,

We are pleased to send you the updates on the 23rd International Congress of Theoretical and Applied Mechanics (ICTAM2012) of the International Union of Theoretical and Applied Mechanics (IUTAM) that will be held in Beijing, August 19-24, 2012.

Research Assistants / Research Associates (3 Posts)

Salary:

£24370 - £28251 per annum (Grade 5), £29972 - £35788 per annum (Grade 6). 
http://www.cardiff.ac.uk/jobs/engin/research-assistants--research-assoc…

"I can't understand how people are still working on growth. That stuff's all done." This was the beginning of the first lunch conversation at a recent Banff workshop on Mathematical Foundations on Mechanical Biology... somewhat frustrating for someone who is excited about growth. Fortunately, most of the presentations and discussions still focused on growth. Although "that stuff's all done".

Forthcoming papers of International Journal of Applied Mechanics (IJAM) Vol.4 No.1:

1.     “A SPECTRAL/HP FINITE ELEMENT FORMULATION FOR VISCOELASTIC BEAMS BASED ON A HIGH-ORDER BEAM THEORY”,  V. P. VALLALA, G. S. PAYETTE AND J. N. REDDY, (TEXAS A&M UNIVERSITY, USA).