Hi, I’m trying to deform a CNT sample using “fix 2 all deform 1 x erate 0.1 remap x units box” where 0.1 is erate value = R R = engineering strain rate (1/time units) But I cannot figure out is this strain rate equivalent to a strain rate like 0.1 mm/sec or something like this? I’m using “real” units for the simulation. What’s the actual meaning of this R and is there any othe…

I downloaded a data file from Lammps examples and the file is not organized in a way readable by lammps. The file contains atom positions along with all of the bond, angle, and dihedral angle lists of polyethylene (attached). I need to reorganize the structure that can be read by LAMMPS. The final product should look like this: image794×1006 55.8 KB I was wondering if you kn…

Dear LAMMPS Users, I’m trying to install the latest stable version of LAMMPS (lammps-29Oct20) on my MacBook with macOS 11. When I use “make serial” command to compile, it shows me these: make serial make[1]: libmpi_stubs.a' is up to date. Gathering installed package information (may take a little while) make[1]: lmpinstalledpkgs.h’ is up to date. Gathering git version informati…

Hello everyone, I am running glassy polymer simulation in lammps. I choose a box that is 1/3rd volume filled with glassy polymer chains(1000 chains). then I equilibrate this box and maintained zero pressure inside the box. Now I am filling 1/3rd volume by another 1000 chains. now we get some positive pressure in our system. can anyone explain why we are getting some positive pre…