Dear Lammps Users, Running a very simple simulation with strange results. I want to give particles from two groups an initial velocity so they move along the x-axis but in opposite directions. The “set velocity” command of lammps for groups of atoms does not appear to be working as nothing is really moving when I look at the dump files. However if I use “set velocity” for all part…

Hi, I am trying to obtain shear stress xy for a small region of my 3D workpiece during nanocutting process. However, my shear strength was around 10 times smaller than values provided by literature, and the trend is not obvious. I wonder if there is any mistake done in my code. However, my hydrostatic stress results matches the values of the literature. Part of my input file uni…

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Dear lammps users, I have a question about the visualization of files. When I use dump command such as 「dump 1 all custom 100 dump.file.bin id x y z」, OVITO can visualize dump file. However, when I use restart command such as 「restart 100 file.restart」, OVITO cannot treat restart file. Could you tell me how to visualize the restart file. Best regards, Yuki 1 …

Is it possible to use lammps to perform dynamics with forces provided by an external (python) code? If so, could you please suggest a viable strategy to implement it? I have a machine learning code that provides the cartesian components of the force acting on each atom. I am not interested in defining pair or bond terms. Most of the computer time will be used by the machine lea…