research

I am trying to apply Berendsen thermostat for CNT. When I choose to leave one third of the tube atoms to evolve freely with out distrubing the momentum, I am unable to acheive the target temperature and further temperature increases gradually over the whole simulation run (even with a thermostat parameter equals to the timestep i.e., like a simple scaling). How it is possible to acheive target temperature,by scaling only a part of atoms, using some scaling value which should actually scales all the atoms momenta.

One of the most important things every researcher does in the beginning of his introduction to a topic is review process. Most helpful papers in this regard are review papers. Review papers are important. They are primary and best way to understand the value of a work for the societyto award and grant. They help researchers to find out needs of people who use our research and goal functions of scientific society. Help researchers to find out good topics and also good solutions. And the final effect of a research on the society.

I've started to look into the modeling of polyurethane.  So far I'v found one paper that specifically looks into how to model the mechanical behavior of PU. It describes a possible constitutive model for PU:

Stress-strain behavior of thermoplastic polyurethanes, Qi,H.J.; Boyce, M.C., Mech. Mater. 2005, 37, 8, 817-839

Does someone know of any other resources on the modeling of PU?  Thanks, Andreas

Consider a ridig pillar ontop of a elastic substrate. Applying a moment to the pillar will lead to elastic deformation of the substrate. If the pillar is infinitly large in diameter, then this problem is the same as an infinitely sharp crack, considering the symmetry of the crack problem, i.e. there are square root singularities. However, the infinitly large diameter assumtion does not hold if the global rotation of the substrate under the pillar is of interest, because the both sides of the pillar interact.

dear imechanica friends

   the Grand challenges  for Engineering make clear that we should work for the good of our Society.  So, how much of technology really makes are happier?

hi all

i want to make a model of  e-glass epoxy composite laminate with [45(10),0(10)] of 20 layers with out considering the symmetry

i have fundamental knowledge about ansys

please  suggest the procedure

I am a junior graduate student now, and very interesting in wave motion. My advisor Prof. Zhong wanxie and his PHD student qiang Gao have developed a precise numerical technique to solve the Rayleigh wave frequency equation, which can avoid the missing root. They did a systematic work involving surface wave propagation in a transversely isotropic stratified solid resting on an elastic semi-infinte space, wave propagation in the anisotropic layered media and the propagation of stationary and non-stationary random waves in a viscoelastic, transversely isotropic and stratified half space.

We study the effects of grain boundary adhesion and grain size on the ductility of thin metal films well bonded to polymer substrates, using finite element method. It is shown that the ductility of polymer-supported metal films increases approximately linearly as the grain boundary adhesion increases, and as the grain size decreases. A rule-of-thumb estimate of the ductility of polymer-supported metal films agrees well with the simulation results.

In press, Scripta Materialia, 2008 

I recently stumbled across the patent that is attached to this post.  It's title 'Simulation of String Vibration' obviously caught my attention.  Hoping there was more to it, I downloaded and read it.  To save you the time, I'll summarize.  It basically reads like a conference paper that would probably not get accepted into any respectable journal.  What is patent is a little more specific than the title would imply but nothing that is any more than a trivial extension of existing research.  Essentially the patent describes a way (finite elements) to simulate the planar vibration of a strin

Here is a report on Citation Statistics written by the  International Mathematical Union written in cooperation with the ICIAM and IMS.

Given all the discussion on impact factors and h-indicies, I thought many people may find this report interesting.