I am going to apply a constant force to one end of a carbon nanotube while the other end is constant. I have used command “fix setforce”, but the results does not make any sense. While I expect after some time to have a constant extension (with some fluctuations), the extension is increasing until the carbon nanotube rupturs. I am using MD, and the “pairstyle” is “Airebo”. What is your idea?
All the best,