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From: Jennifer A Carvajal (Jennifer.Carvajal_at_chemail.tamu.edu)
Date: Tue Nov 14 2006 - 14:51:13 CST

I have built a crystal system of nanotubes and I want apply a compressive force to estimate elastic properties of the system. I was using SMD to apply the forces but I don’t want to fix atoms.
Is there any way to apply this kind of forces in VMD without fixing atoms?

There is a paper citing VMD related:

Tuszynski, J.A., Luchko, T., Portet, S., Dixon, J.M.
Anisotropic elastic properties of microtubules
EUROPEAN PHYSICAL JOURNAL E, 17:29-35, MAY 2005
www.ks.uiuc.edu/Research/vmd/allversions/citations/abstracts/ISI:000232026300004.html

Thanks in advance for your suggestions,
 
Andrea