research

It is well known that the wall-to-wall interactions play a great part in the deformation of MWCNTs. At the first glance, I thought the pressures, duing to van der Waal interaction, on the inner tube and out tube should be proportional to their radii inversely, because this interaction is a kind of action and reaction. BUT actually it is not the case, as illuminated in our paper published in APL, although this two pressures are both functions of the radii, they are not inversely proportional to the radii. 

As we know, lattice boltzmann method is one method to solve the fluid problems. and the primary work to use this method is give the corrected "boundary conditon"__pressure conditions and velocity conditions.

To general problems, the PC and VC for 2D/3D problems has been obtained by some scientists(eg.D3Q19,D2q9 ...model).

But to the lowest scale problems, the "force" fields is complexed and the traditional PC/VC is not suit for this kind of problems.

My opinion:

Research on multiscale stochastic modeling is becoming big. In this article "A Green-function-based multiscale method for uncertainty quantification of finite body random heterogeneous materials"  doi:10.1016/j.compstruc.2009.05.009 , one of the first multiscale stochastic methods is developed for solid mechanics applications.....    

For a flexible electronic device integrating inorganic materials on a polymer substrate, the polymer can deform substantially, but the inorganic materials usually fracture at small strains.  This paper describes an approach to make such a device highly stretchable.  A polyimide substrate is first coated with a thin layer of an elastomer, on top of which SiN_x islands are fabricated.  When the substrate is stretched to a large strain, the SiN_x islands remain intact.  Calculations confirm that the elastomer reduces the strain in the S

In a lithium-ion battery, both electrodes are atomic frameworks that host mobile lithium ions. When the battery is being charged or discharged, lithium ions diffuse from one electrode to the other. Such an insertion reaction deforms the electrodes, and may cause the electrodes to crack. This paper uses fracture mechanics to determine the critical conditions to avert cracking. The method is applied to cracks induced by the mismatch between phases in crystalline particles of LiFePO4

Recently published, this special issue of the Journal of the Mechanical Behavior of Biomedical Materials, dedicated to ‘Nanoindentation of Biological Materials' provides a snapshot of the novel uses on nanoindentation technology that is now readily available to researchers and expands the scope of existing techniques to optimize methods for biological tissues and related biomaterials.

Access the issue online:

http://www.sciencedirect.com/science/journal/17516161 (ScienceDirect subscribers)

Two new papers grabbed my attention on my long unread list of journal tables of contents in Google Reader. 

1) The first was